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authorMark Thompson <sw@jkqxz.net>2018-09-09 23:08:11 +0100
committerMark Thompson <sw@jkqxz.net>2018-09-26 23:27:53 +0100
commitc8c81ac5026c20ce60860dc9aa905e5e1634bed1 (patch)
tree81af3b529e2b4a54a26f945546bba25dbe23ef3e
parent5ee4144701921cef908c159a4042c8fa9a7b24d1 (diff)
downloadffmpeg-c8c81ac5026c20ce60860dc9aa905e5e1634bed1.tar.gz
lavc: Add coded bitstream read/write support for AV1
-rwxr-xr-xconfigure2
-rw-r--r--libavcodec/Makefile1
-rw-r--r--libavcodec/av1.h88
-rw-r--r--libavcodec/cbs.c6
-rw-r--r--libavcodec/cbs_av1.c1320
-rw-r--r--libavcodec/cbs_av1.h429
-rw-r--r--libavcodec/cbs_av1_syntax_template.c1694
-rw-r--r--libavcodec/cbs_internal.h1
8 files changed, 3541 insertions, 0 deletions
diff --git a/configure b/configure
index f3795833b1..db8d5c74e6 100755
--- a/configure
+++ b/configure
@@ -2271,6 +2271,7 @@ CONFIG_EXTRA="
bswapdsp
cabac
cbs
+ cbs_av1
cbs_h264
cbs_h265
cbs_jpeg
@@ -2535,6 +2536,7 @@ w32threads_deps="atomics_native"
threads_if_any="$THREADS_LIST"
# subsystems
+cbs_av1_select="cbs"
cbs_h264_select="cbs golomb"
cbs_h265_select="cbs golomb"
cbs_jpeg_select="cbs"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f0eb96a865..5ec773c61b 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -63,6 +63,7 @@ OBJS-$(CONFIG_BLOCKDSP) += blockdsp.o
OBJS-$(CONFIG_BSWAPDSP) += bswapdsp.o
OBJS-$(CONFIG_CABAC) += cabac.o
OBJS-$(CONFIG_CBS) += cbs.o
+OBJS-$(CONFIG_CBS_AV1) += cbs_av1.o
OBJS-$(CONFIG_CBS_H264) += cbs_h2645.o h2645_parse.o
OBJS-$(CONFIG_CBS_H265) += cbs_h2645.o h2645_parse.o
OBJS-$(CONFIG_CBS_JPEG) += cbs_jpeg.o
diff --git a/libavcodec/av1.h b/libavcodec/av1.h
index c989b69974..f2ec39c86b 100644
--- a/libavcodec/av1.h
+++ b/libavcodec/av1.h
@@ -39,4 +39,92 @@ typedef enum {
AV1_OBU_PADDING = 15,
} AV1_OBU_Type;
+// Metadata types (section 6.7.1).
+enum {
+ AV1_METADATA_TYPE_HDR_CLL = 1,
+ AV1_METADATA_TYPE_HDR_MDCV = 2,
+ AV1_METADATA_TYPE_SCALABILITY = 3,
+ AV1_METADATA_TYPE_ITUT_T35 = 4,
+ AV1_METADATA_TYPE_TIMECODE = 5,
+};
+
+// Frame types (section 6.8.2).
+enum {
+ AV1_FRAME_KEY = 0,
+ AV1_FRAME_INTER = 1,
+ AV1_FRAME_INTRA_ONLY = 2,
+ AV1_FRAME_SWITCH = 3,
+};
+
+// Reference frames (section 6.10.24).
+enum {
+ AV1_REF_FRAME_INTRA = 0,
+ AV1_REF_FRAME_LAST = 1,
+ AV1_REF_FRAME_LAST2 = 2,
+ AV1_REF_FRAME_LAST3 = 3,
+ AV1_REF_FRAME_GOLDEN = 4,
+ AV1_REF_FRAME_BWDREF = 5,
+ AV1_REF_FRAME_ALTREF2 = 6,
+ AV1_REF_FRAME_ALTREF = 7,
+};
+
+// Constants (section 3).
+enum {
+ AV1_MAX_OPERATING_POINTS = 32,
+
+ AV1_MAX_SB_SIZE = 128,
+ AV1_MI_SIZE = 4,
+
+ AV1_MAX_TILE_WIDTH = 4096,
+ AV1_MAX_TILE_AREA = 4096 * 2304,
+ AV1_MAX_TILE_ROWS = 64,
+ AV1_MAX_TILE_COLS = 64,
+
+ AV1_NUM_REF_FRAMES = 8,
+ AV1_REFS_PER_FRAME = 7,
+ AV1_TOTAL_REFS_PER_FRAME = 8,
+ AV1_PRIMARY_REF_NONE = 7,
+
+ AV1_MAX_SEGMENTS = 8,
+ AV1_SEG_LVL_MAX = 8,
+
+ AV1_SEG_LVL_ALT_Q = 0,
+ AV1_SEG_LVL_ALT_LF_Y_V = 1,
+ AV1_SEG_LVL_REF_FRAME = 5,
+ AV1_SEG_LVL_SKIP = 6,
+ AV1_SEG_LVL_GLOBAL_MV = 7,
+
+ AV1_SELECT_SCREEN_CONTENT_TOOLS = 2,
+ AV1_SELECT_INTEGER_MV = 2,
+
+ AV1_SUPERRES_NUM = 8,
+ AV1_SUPERRES_DENOM_MIN = 9,
+
+ AV1_INTERPOLATION_FILTER_SWITCHABLE = 4,
+
+ AV1_GM_ABS_ALPHA_BITS = 12,
+ AV1_GM_ALPHA_PREC_BITS = 15,
+ AV1_GM_ABS_TRANS_ONLY_BITS = 9,
+ AV1_GM_TRANS_ONLY_PREC_BITS = 3,
+ AV1_GM_ABS_TRANS_BITS = 12,
+ AV1_GM_TRANS_PREC_BITS = 6,
+ AV1_WARPEDMODEL_PREC_BITS = 16,
+
+ AV1_WARP_MODEL_IDENTITY = 0,
+ AV1_WARP_MODEL_TRANSLATION = 1,
+ AV1_WARP_MODEL_ROTZOOM = 2,
+ AV1_WARP_MODEL_AFFINE = 3,
+};
+
+
+// The main colour configuration information uses the same ISO/IEC 23001-8
+// (H.273) enums as FFmpeg does, so separate definitions are not required.
+
+// Chroma sample position.
+enum {
+ AV1_CSP_UNKNOWN = 0,
+ AV1_CSP_VERTICAL = 1, // -> AVCHROMA_LOC_LEFT.
+ AV1_CSP_COLOCATED = 2, // -> AVCHROMA_LOC_TOPLEFT.
+};
+
#endif /* AVCODEC_AV1_H */
diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index bb3ce95971..ecbf57c293 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -29,6 +29,9 @@
static const CodedBitstreamType *cbs_type_table[] = {
+#if CONFIG_CBS_AV1
+ &ff_cbs_type_av1,
+#endif
#if CONFIG_CBS_H264
&ff_cbs_type_h264,
#endif
@@ -47,6 +50,9 @@ static const CodedBitstreamType *cbs_type_table[] = {
};
const enum AVCodecID ff_cbs_all_codec_ids[] = {
+#if CONFIG_CBS_AV1
+ AV_CODEC_ID_AV1,
+#endif
#if CONFIG_CBS_H264
AV_CODEC_ID_H264,
#endif
diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c
new file mode 100644
index 0000000000..9bac9dde09
--- /dev/null
+++ b/libavcodec/cbs_av1.c
@@ -0,0 +1,1320 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/pixfmt.h"
+
+#include "cbs.h"
+#include "cbs_internal.h"
+#include "cbs_av1.h"
+#include "internal.h"
+
+
+static int cbs_av1_read_uvlc(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ const char *name, uint32_t *write_to,
+ uint32_t range_min, uint32_t range_max)
+{
+ uint32_t value;
+ int position, zeroes, i, j;
+ char bits[65];
+
+ if (ctx->trace_enable)
+ position = get_bits_count(gbc);
+
+ zeroes = i = 0;
+ while (1) {
+ if (get_bits_left(gbc) < zeroes + 1) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at "
+ "%s: bitstream ended.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (get_bits1(gbc)) {
+ bits[i++] = '1';
+ break;
+ } else {
+ bits[i++] = '0';
+ ++zeroes;
+ }
+ }
+
+ if (zeroes >= 32) {
+ value = MAX_UINT_BITS(32);
+ } else {
+ value = get_bits_long(gbc, zeroes);
+
+ for (j = 0; j < zeroes; j++)
+ bits[i++] = (value >> (zeroes - j - 1) & 1) ? '1' : '0';
+
+ value += (1 << zeroes) - 1;
+ }
+
+ if (ctx->trace_enable) {
+ bits[i] = 0;
+ ff_cbs_trace_syntax_element(ctx, position, name, NULL,
+ bits, value);
+ }
+
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_av1_write_uvlc(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ const char *name, uint32_t value,
+ uint32_t range_min, uint32_t range_max)
+{
+ uint32_t v;
+ int position, zeroes;
+
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (ctx->trace_enable)
+ position = put_bits_count(pbc);
+
+ if (value == 0) {
+ zeroes = 0;
+ put_bits(pbc, 1, 1);
+ } else {
+ zeroes = av_log2(value + 1);
+ v = value - (1 << zeroes) + 1;
+ put_bits(pbc, zeroes + 1, 1);
+ put_bits(pbc, zeroes, v);
+ }
+
+ if (ctx->trace_enable) {
+ char bits[65];
+ int i, j;
+ i = 0;
+ for (j = 0; j < zeroes; j++)
+ bits[i++] = '0';
+ bits[i++] = '1';
+ for (j = 0; j < zeroes; j++)
+ bits[i++] = (v >> (zeroes - j - 1) & 1) ? '1' : '0';
+ bits[i++] = 0;
+ ff_cbs_trace_syntax_element(ctx, position, name, NULL,
+ bits, value);
+ }
+
+ return 0;
+}
+
+static int cbs_av1_read_leb128(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ const char *name, uint64_t *write_to)
+{
+ uint64_t value;
+ int position, err, i;
+
+ if (ctx->trace_enable)
+ position = get_bits_count(gbc);
+
+ value = 0;
+ for (i = 0; i < 8; i++) {
+ int subscript[2] = { 1, i };
+ uint32_t byte;
+ err = ff_cbs_read_unsigned(ctx, gbc, 8, "leb128_byte[i]", subscript,
+ &byte, 0x00, 0xff);
+ if (err < 0)
+ return err;
+
+ value |= (uint64_t)(byte & 0x7f) << (i * 7);
+ if (!(byte & 0x80))
+ break;
+ }
+
+ if (ctx->trace_enable)
+ ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value);
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_av1_write_leb128(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ const char *name, uint64_t value)
+{
+ int position, err, len, i;
+ uint8_t byte;
+
+ len = (av_log2(value) + 7) / 7;
+
+ if (ctx->trace_enable)
+ position = put_bits_count(pbc);
+
+ for (i = 0; i < len; i++) {
+ int subscript[2] = { 1, i };
+
+ byte = value >> (7 * i) & 0x7f;
+ if (i < len - 1)
+ byte |= 0x80;
+
+ err = ff_cbs_write_unsigned(ctx, pbc, 8, "leb128_byte[i]", subscript,
+ byte, 0x00, 0xff);
+ if (err < 0)
+ return err;
+ }
+
+ if (ctx->trace_enable)
+ ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value);
+
+ return 0;
+}
+
+static int cbs_av1_read_su(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ int width, const char *name,
+ const int *subscripts, int32_t *write_to)
+{
+ uint32_t magnitude;
+ int position, sign;
+ int32_t value;
+
+ if (ctx->trace_enable)
+ position = get_bits_count(gbc);
+
+ if (get_bits_left(gbc) < width + 1) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid signed value at "
+ "%s: bitstream ended.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+
+ magnitude = get_bits(gbc, width);
+ sign = get_bits1(gbc);
+ value = sign ? -(int32_t)magnitude : magnitude;
+
+ if (ctx->trace_enable) {
+ char bits[33];
+ int i;
+ for (i = 0; i < width; i++)
+ bits[i] = magnitude >> (width - i - 1) & 1 ? '1' : '0';
+ bits[i] = sign ? '1' : '0';
+ bits[i + 1] = 0;
+
+ ff_cbs_trace_syntax_element(ctx, position,
+ name, subscripts, bits, value);
+ }
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_av1_write_su(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ int width, const char *name,
+ const int *subscripts, int32_t value)
+{
+ uint32_t magnitude;
+ int sign;
+
+ if (put_bits_left(pbc) < width + 1)
+ return AVERROR(ENOSPC);
+
+ sign = value < 0;
+ magnitude = sign ? -value : value;
+
+ if (ctx->trace_enable) {
+ char bits[33];
+ int i;
+ for (i = 0; i < width; i++)
+ bits[i] = magnitude >> (width - i - 1) & 1 ? '1' : '0';
+ bits[i] = sign ? '1' : '0';
+ bits[i + 1] = 0;
+
+ ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
+ name, subscripts, bits, value);
+ }
+
+ put_bits(pbc, width, magnitude);
+ put_bits(pbc, 1, sign);
+
+ return 0;
+}
+
+static int cbs_av1_read_ns(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ uint32_t n, const char *name,
+ const int *subscripts, uint32_t *write_to)
+{
+ uint32_t w, m, v, extra_bit, value;
+ int position;
+
+ av_assert0(n > 0);
+
+ if (ctx->trace_enable)
+ position = get_bits_count(gbc);
+
+ w = av_log2(n) + 1;
+ m = (1 << w) - n;
+
+ if (get_bits_left(gbc) < w) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid non-symmetric value at "
+ "%s: bitstream ended.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (w - 1 > 0)
+ v = get_bits(gbc, w - 1);
+ else
+ v = 0;
+
+ if (v < m) {
+ value = v;
+ } else {
+ extra_bit = get_bits1(gbc);
+ value = (v << 1) - m + extra_bit;
+ }
+
+ if (ctx->trace_enable) {
+ char bits[33];
+ int i;
+ for (i = 0; i < w - 1; i++)
+ bits[i] = (v >> i & 1) ? '1' : '0';
+ if (v >= m)
+ bits[i++] = extra_bit ? '1' : '0';
+ bits[i] = 0;
+
+ ff_cbs_trace_syntax_element(ctx, position,
+ name, subscripts, bits, value);
+ }
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_av1_write_ns(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ uint32_t n, const char *name,
+ const int *subscripts, uint32_t value)
+{
+ uint32_t w, m, v, extra_bit;
+ int position;
+
+ if (value > n) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [0,%"PRIu32"].\n",
+ name, value, n);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (ctx->trace_enable)
+ position = put_bits_count(pbc);
+
+ w = av_log2(n) + 1;
+ m = (1 << w) - n;
+
+ if (put_bits_left(pbc) < w)
+ return AVERROR(ENOSPC);
+
+ if (value < m) {
+ v = value;
+ put_bits(pbc, w - 1, v);
+ } else {
+ v = m + ((value - m) >> 1);
+ extra_bit = (value - m) & 1;
+ put_bits(pbc, w - 1, v);
+ put_bits(pbc, 1, extra_bit);
+ }
+
+ if (ctx->trace_enable) {
+ char bits[33];
+ int i;
+ for (i = 0; i < w - 1; i++)
+ bits[i] = (v >> i & 1) ? '1' : '0';
+ if (value >= m)
+ bits[i++] = extra_bit ? '1' : '0';
+ bits[i] = 0;
+
+ ff_cbs_trace_syntax_element(ctx, position,
+ name, subscripts, bits, value);
+ }
+
+ return 0;
+}
+
+static int cbs_av1_read_increment(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ uint32_t range_min, uint32_t range_max,
+ const char *name, uint32_t *write_to)
+{
+ uint32_t value;
+ int position, i;
+ char bits[33];
+
+ av_assert0(range_min <= range_max && range_max - range_min < sizeof(bits) - 1);
+ if (ctx->trace_enable)
+ position = get_bits_count(gbc);
+
+ for (i = 0, value = range_min; value < range_max;) {
+ if (get_bits_left(gbc) < 1) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid increment value at "
+ "%s: bitstream ended.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+ if (get_bits1(gbc)) {
+ bits[i++] = '1';
+ ++value;
+ } else {
+ bits[i++] = '0';
+ break;
+ }
+ }
+
+ if (ctx->trace_enable) {
+ bits[i] = 0;
+ ff_cbs_trace_syntax_element(ctx, position,
+ name, NULL, bits, value);
+ }
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_av1_write_increment(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ uint32_t range_min, uint32_t range_max,
+ const char *name, uint32_t value)
+{
+ int len;
+
+ av_assert0(range_min <= range_max && range_max - range_min < 32);
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (value == range_max)
+ len = range_max - range_min;
+ else
+ len = value - range_min + 1;
+ if (put_bits_left(pbc) < len)
+ return AVERROR(ENOSPC);
+
+ if (ctx->trace_enable) {
+ char bits[33];
+ int i;
+ for (i = 0; i < len; i++) {
+ if (range_min + i == value)
+ bits[i] = '0';
+ else
+ bits[i] = '1';
+ }
+ bits[i] = 0;
+ ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
+ name, NULL, bits, value);
+ }
+
+ if (len > 0)
+ put_bits(pbc, len, (1 << len) - 1 - (value != range_max));
+
+ return 0;
+}
+
+static int cbs_av1_read_subexp(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ uint32_t range_max, const char *name,
+ const int *subscripts, uint32_t *write_to)
+{
+ uint32_t value;
+ int position, err;
+ uint32_t max_len, len, range_offset, range_bits;
+
+ if (ctx->trace_enable)
+ position = get_bits_count(gbc);
+
+ av_assert0(range_max > 0);
+ max_len = av_log2(range_max - 1) - 3;
+
+ err = cbs_av1_read_increment(ctx, gbc, 0, max_len,
+ "subexp_more_bits", &len);
+ if (err < 0)
+ return err;
+
+ if (len) {
+ range_bits = 2 + len;
+ range_offset = 1 << range_bits;
+ } else {
+ range_bits = 3;
+ range_offset = 0;
+ }
+
+ if (len < max_len) {
+ err = ff_cbs_read_unsigned(ctx, gbc, range_bits,
+ "subexp_bits", NULL, &value,
+ 0, MAX_UINT_BITS(range_bits));
+ if (err < 0)
+ return err;
+
+ } else {
+ err = cbs_av1_read_ns(ctx, gbc, range_max - range_offset,
+ "subexp_final_bits", NULL, &value);
+ if (err < 0)
+ return err;
+ }
+ value += range_offset;
+
+ if (ctx->trace_enable)
+ ff_cbs_trace_syntax_element(ctx, position,
+ name, subscripts, "", value);
+
+ *write_to = value;
+ return err;
+}
+
+static int cbs_av1_write_subexp(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ uint32_t range_max, const char *name,
+ const int *subscripts, uint32_t value)
+{
+ int position, err;
+ uint32_t max_len, len, range_offset, range_bits;
+
+ if (value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [0,%"PRIu32"].\n",
+ name, value, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (ctx->trace_enable)
+ position = put_bits_count(pbc);
+
+ av_assert0(range_max > 0);
+ max_len = av_log2(range_max - 1) - 3;
+
+ if (value < 8) {
+ range_bits = 3;
+ range_offset = 0;
+ len = 0;
+ } else {
+ range_bits = av_log2(value);
+ len = range_bits - 2;
+ if (len > max_len) {
+ // The top bin is combined with the one below it.
+ av_assert0(len == max_len + 1);
+ --range_bits;
+ len = max_len;
+ }
+ range_offset = 1 << range_bits;
+ }
+
+ err = cbs_av1_write_increment(ctx, pbc, 0, max_len,
+ "subexp_more_bits", len);
+ if (err < 0)
+ return err;
+
+ if (len < max_len) {
+ err = ff_cbs_write_unsigned(ctx, pbc, range_bits,
+ "subexp_bits", NULL,
+ value - range_offset,
+ 0, MAX_UINT_BITS(range_bits));
+ if (err < 0)
+ return err;
+
+ } else {
+ err = cbs_av1_write_ns(ctx, pbc, range_max - range_offset,
+ "subexp_final_bits", NULL,
+ value - range_offset);
+ if (err < 0)
+ return err;
+ }
+
+ if (ctx->trace_enable)
+ ff_cbs_trace_syntax_element(ctx, position,
+ name, subscripts, "", value);
+
+ return err;
+}
+
+
+static int cbs_av1_tile_log2(int blksize, int target)
+{
+ int k;
+ for (k = 0; (blksize << k) < target; k++);
+ return k;
+}
+
+static int cbs_av1_get_relative_dist(const AV1RawSequenceHeader *seq,
+ unsigned int a, unsigned int b)
+{
+ unsigned int diff, m;
+ if (!seq->enable_order_hint)
+ return 0;
+ diff = a - b;
+ m = 1 << seq->order_hint_bits_minus_1;
+ diff = (diff & (m - 1)) - (diff & m);
+ return diff;
+}
+
+
+#define HEADER(name) do { \
+ ff_cbs_trace_header(ctx, name); \
+ } while (0)
+
+#define CHECK(call) do { \
+ err = (call); \
+ if (err < 0) \
+ return err; \
+ } while (0)
+
+#define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
+#define FUNC_AV1(rw, name) FUNC_NAME(rw, av1, name)
+#define FUNC(name) FUNC_AV1(READWRITE, name)
+
+#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
+
+#define fb(width, name) \
+ xf(width, name, current->name, 0, MAX_UINT_BITS(width), 0)
+#define fc(width, name, range_min, range_max) \
+ xf(width, name, current->name, range_min, range_max, 0)
+#define flag(name) fb(1, name)
+#define su(width, name) \
+ xsu(width, name, current->name, 0)
+
+#define fbs(width, name, subs, ...) \
+ xf(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
+#define fcs(width, name, range_min, range_max, subs, ...) \
+ xf(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
+#define flags(name, subs, ...) \
+ xf(1, name, current->name, 0, 1, subs, __VA_ARGS__)
+#define sus(width, name, subs, ...) \
+ xsu(width, name, current->name, subs, __VA_ARGS__)
+
+#define fixed(width, name, value) do { \
+ av_unused uint32_t fixed_value = value; \
+ xf(width, name, fixed_value, value, value, 0); \
+ } while (0)
+
+
+#define READ
+#define READWRITE read
+#define RWContext GetBitContext
+
+#define xf(width, name, var, range_min, range_max, subs, ...) do { \
+ uint32_t value = range_min; \
+ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), \
+ &value, range_min, range_max)); \
+ var = value; \
+ } while (0)
+
+#define xsu(width, name, var, subs, ...) do { \
+ int32_t value = 0; \
+ CHECK(cbs_av1_read_su(ctx, rw, width, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
+ var = value; \
+ } while (0)
+
+#define uvlc(name, range_min, range_max) do { \
+ uint32_t value = range_min; \
+ CHECK(cbs_av1_read_uvlc(ctx, rw, #name, \
+ &value, range_min, range_max)); \
+ current->name = value; \
+ } while (0)
+
+#define ns(max_value, name, subs, ...) do { \
+ uint32_t value = 0; \
+ CHECK(cbs_av1_read_ns(ctx, rw, max_value, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
+ current->name = value; \
+ } while (0)
+
+#define increment(name, min, max) do { \
+ uint32_t value = 0; \
+ CHECK(cbs_av1_read_increment(ctx, rw, min, max, #name, &value)); \
+ current->name = value; \
+ } while (0)
+
+#define subexp(name, max, subs, ...) do { \
+ uint32_t value = 0; \
+ CHECK(cbs_av1_read_subexp(ctx, rw, max, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
+ current->name = value; \
+ } while (0)
+
+#define delta_q(name) do { \
+ uint8_t delta_coded; \
+ int8_t delta_q; \
+ xf(1, name.delta_coded, delta_coded, 0, 1, 0); \
+ if (delta_coded) \
+ xsu(1 + 6, name.delta_q, delta_q, 0); \
+ else \
+ delta_q = 0; \
+ current->name = delta_q; \
+ } while (0)
+
+#define leb128(name) do { \
+ uint64_t value = 0; \
+ CHECK(cbs_av1_read_leb128(ctx, rw, #name, &value)); \
+ current->name = value; \
+ } while (0)
+
+#define infer(name, value) do { \
+ current->name = value; \
+ } while (0)
+
+#define byte_alignment(rw) (get_bits_count(rw) % 8)
+
+#include "cbs_av1_syntax_template.c"
+
+#undef READ
+#undef READWRITE
+#undef RWContext
+#undef xf
+#undef xsu
+#undef uvlc
+#undef leb128
+#undef ns
+#undef increment
+#undef subexp
+#undef delta_q
+#undef leb128
+#undef infer
+#undef byte_alignment
+
+
+#define WRITE
+#define READWRITE write
+#define RWContext PutBitContext
+
+#define xf(width, name, var, range_min, range_max, subs, ...) do { \
+ CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), \
+ var, range_min, range_max)); \
+ } while (0)
+
+#define xsu(width, name, var, subs, ...) do { \
+ CHECK(cbs_av1_write_su(ctx, rw, width, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), var)); \
+ } while (0)
+
+#define uvlc(name, range_min, range_max) do { \
+ CHECK(cbs_av1_write_uvlc(ctx, rw, #name, current->name, \
+ range_min, range_max)); \
+ } while (0)
+
+#define ns(max_value, name, subs, ...) do { \
+ CHECK(cbs_av1_write_ns(ctx, rw, max_value, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), \
+ current->name)); \
+ } while (0)
+
+#define increment(name, min, max) do { \
+ CHECK(cbs_av1_write_increment(ctx, rw, min, max, #name, \
+ current->name)); \
+ } while (0)
+
+#define subexp(name, max, subs, ...) do { \
+ CHECK(cbs_av1_write_subexp(ctx, rw, max, #name, \
+ SUBSCRIPTS(subs, __VA_ARGS__), \
+ current->name)); \
+ } while (0)
+
+#define delta_q(name) do { \
+ xf(1, name.delta_coded, current->name != 0, 0, 1, 0); \
+ if (current->name) \
+ xsu(1 + 6, name.delta_q, current->name, 0); \
+ } while (0)
+
+#define leb128(name) do { \
+ CHECK(cbs_av1_write_leb128(ctx, rw, #name, current->name)); \
+ } while (0)
+
+#define infer(name, value) do { \
+ if (current->name != (value)) { \
+ av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
+ "%s does not match inferred value: " \
+ "%"PRId64", but should be %"PRId64".\n", \
+ #name, (int64_t)current->name, (int64_t)(value)); \
+ } \
+ } while (0)
+
+#define byte_alignment(rw) (put_bits_count(rw) % 8)
+
+#include "cbs_av1_syntax_template.c"
+
+#undef READ
+#undef READWRITE
+#undef RWContext
+#undef xf
+#undef xsu
+#undef uvlc
+#undef leb128
+#undef ns
+#undef increment
+#undef subexp
+#undef delta_q
+#undef infer
+#undef byte_alignment
+
+
+static int cbs_av1_split_fragment(CodedBitstreamContext *ctx,
+ CodedBitstreamFragment *frag,
+ int header)
+{
+ GetBitContext gbc;
+ uint8_t *data;
+ size_t size;
+ uint64_t obu_length;
+ int pos, err, trace;
+
+ // Don't include this parsing in trace output.
+ trace = ctx->trace_enable;
+ ctx->trace_enable = 0;
+
+ data = frag->data;
+ size = frag->data_size;
+
+ if (INT_MAX / 8 < size) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid fragment: "
+ "too large (%zu bytes).\n", size);
+ err = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+ while (size > 0) {
+ AV1RawOBUHeader header;
+ uint64_t obu_size;
+
+ init_get_bits(&gbc, data, 8 * size);
+
+ err = cbs_av1_read_obu_header(ctx, &gbc, &header);
+ if (err < 0)
+ goto fail;
+
+ if (!header.obu_has_size_field) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU for raw "
+ "stream: size field must be present.\n");
+ err = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+ if (get_bits_left(&gbc) < 8) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU: fragment "
+ "too short (%zu bytes).\n", size);
+ err = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+ err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
+ if (err < 0)
+ goto fail;
+
+ pos = get_bits_count(&gbc);
+ av_assert0(pos % 8 == 0 && pos / 8 <= size);
+
+ obu_length = pos / 8 + obu_size;
+
+ if (size < obu_length) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
+ "%"PRIu64", but only %zu bytes remaining in fragment.\n",
+ obu_length, size);
+ err = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+ err = ff_cbs_insert_unit_data(ctx, frag, -1, header.obu_type,
+ data, obu_length, frag->data_ref);
+ if (err < 0)
+ goto fail;
+
+ data += obu_length;
+ size -= obu_length;
+ }
+
+ err = 0;
+fail:
+ ctx->trace_enable = trace;
+ return err;
+}
+
+static void cbs_av1_free_tile_data(AV1RawTileData *td)
+{
+ av_buffer_unref(&td->data_ref);
+}
+
+static void cbs_av1_free_metadata(AV1RawMetadata *md)
+{
+ switch (md->metadata_type) {
+ case AV1_METADATA_TYPE_ITUT_T35:
+ av_buffer_unref(&md->metadata.itut_t35.payload_ref);
+ break;
+ }
+}
+
+static void cbs_av1_free_obu(void *unit, uint8_t *content)
+{
+ AV1RawOBU *obu = (AV1RawOBU*)content;
+
+ switch (obu->header.obu_type) {
+ case AV1_OBU_TILE_GROUP:
+ cbs_av1_free_tile_data(&obu->obu.tile_group.tile_data);
+ break;
+ case AV1_OBU_FRAME:
+ cbs_av1_free_tile_data(&obu->obu.frame.tile_group.tile_data);
+ break;
+ case AV1_OBU_TILE_LIST:
+ cbs_av1_free_tile_data(&obu->obu.tile_list.tile_data);
+ break;
+ case AV1_OBU_METADATA:
+ cbs_av1_free_metadata(&obu->obu.metadata);
+ break;
+ }
+
+ av_freep(&obu);
+}
+
+static int cbs_av1_ref_tile_data(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit,
+ GetBitContext *gbc,
+ AV1RawTileData *td)
+{
+ int pos;
+
+ pos = get_bits_count(gbc);
+ if (pos >= 8 * unit->data_size) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Bitstream ended before "
+ "any data in tile group (%d bits read).\n", pos);
+ return AVERROR_INVALIDDATA;
+ }
+ // Must be byte-aligned at this point.
+ av_assert0(pos % 8 == 0);
+
+ td->data_ref = av_buffer_ref(unit->data_ref);
+ if (!td->data_ref)
+ return AVERROR(ENOMEM);
+
+ td->data = unit->data + pos / 8;
+ td->data_size = unit->data_size - pos / 8;
+
+ return 0;
+}
+
+static int cbs_av1_read_unit(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ AV1RawOBU *obu;
+ GetBitContext gbc;
+ int err, start_pos, end_pos;
+
+ err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*obu),
+ &cbs_av1_free_obu);
+ if (err < 0)
+ return err;
+ obu = unit->content;
+
+ err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
+ if (err < 0)
+ return err;
+
+ err = cbs_av1_read_obu_header(ctx, &gbc, &obu->header);
+ if (err < 0)
+ return err;
+ av_assert0(obu->header.obu_type == unit->type);
+
+ if (obu->header.obu_has_size_field) {
+ uint64_t obu_size;
+ err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
+ if (err < 0)
+ return err;
+ obu->obu_size = obu_size;
+ } else {
+ if (unit->data_size < 1 + obu->header.obu_extension_flag) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
+ "unit too short (%zu).\n", unit->data_size);
+ return AVERROR_INVALIDDATA;
+ }
+ obu->obu_size = unit->data_size - 1 - obu->header.obu_extension_flag;
+ }
+
+ start_pos = get_bits_count(&gbc);
+
+ if (obu->header.obu_extension_flag) {
+ priv->temporal_id = obu->header.temporal_id;
+ priv->spatial_id = obu->header.temporal_id;
+
+ if (obu->header.obu_type != AV1_OBU_SEQUENCE_HEADER &&
+ obu->header.obu_type != AV1_OBU_TEMPORAL_DELIMITER &&
+ priv->operating_point_idc) {
+ int in_temporal_layer =
+ (priv->operating_point_idc >> priv->temporal_id ) & 1;
+ int in_spatial_layer =
+ (priv->operating_point_idc >> (priv->spatial_id + 8)) & 1;
+ if (!in_temporal_layer || !in_spatial_layer) {
+ // Decoding will drop this OBU at this operating point.
+ }
+ }
+ } else {
+ priv->temporal_id = 0;
+ priv->spatial_id = 0;
+ }
+
+ switch (obu->header.obu_type) {
+ case AV1_OBU_SEQUENCE_HEADER:
+ {
+ err = cbs_av1_read_sequence_header_obu(ctx, &gbc,
+ &obu->obu.sequence_header);
+ if (err < 0)
+ return err;
+
+ av_buffer_unref(&priv->sequence_header_ref);
+ priv->sequence_header = NULL;
+
+ priv->sequence_header_ref = av_buffer_ref(unit->content_ref);
+ if (!priv->sequence_header_ref)
+ return AVERROR(ENOMEM);
+ priv->sequence_header = &obu->obu.sequence_header;
+ }
+ break;
+ case AV1_OBU_TEMPORAL_DELIMITER:
+ {
+ err = cbs_av1_read_temporal_delimiter_obu(ctx, &gbc);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_FRAME_HEADER:
+ case AV1_OBU_REDUNDANT_FRAME_HEADER:
+ {
+ err = cbs_av1_read_frame_header_obu(ctx, &gbc,
+ &obu->obu.frame_header);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_TILE_GROUP:
+ {
+ err = cbs_av1_read_tile_group_obu(ctx, &gbc,
+ &obu->obu.tile_group);
+ if (err < 0)
+ return err;
+
+ err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
+ &obu->obu.tile_group.tile_data);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_FRAME:
+ {
+ err = cbs_av1_read_frame_obu(ctx, &gbc, &obu->obu.frame);
+ if (err < 0)
+ return err;
+
+ err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
+ &obu->obu.frame.tile_group.tile_data);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_TILE_LIST:
+ {
+ err = cbs_av1_read_tile_list_obu(ctx, &gbc,
+ &obu->obu.tile_list);
+ if (err < 0)
+ return err;
+
+ err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
+ &obu->obu.tile_list.tile_data);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_METADATA:
+ {
+ err = cbs_av1_read_metadata_obu(ctx, &gbc, &obu->obu.metadata);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_PADDING:
+ default:
+ return AVERROR(ENOSYS);
+ }
+
+ end_pos = get_bits_count(&gbc);
+ av_assert0(end_pos <= unit->data_size * 8);
+
+ if (obu->obu_size > 0 &&
+ obu->header.obu_type != AV1_OBU_TILE_GROUP &&
+ obu->header.obu_type != AV1_OBU_FRAME) {
+ err = cbs_av1_read_trailing_bits(ctx, &gbc,
+ obu->obu_size * 8 + start_pos - end_pos);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int cbs_av1_write_obu(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit,
+ PutBitContext *pbc)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ AV1RawOBU *obu = unit->content;
+ PutBitContext pbc_tmp;
+ AV1RawTileData *td;
+ size_t header_size;
+ int err, start_pos, end_pos, data_pos;
+
+ // OBUs in the normal bitstream format must contain a size field
+ // in every OBU (in annex B it is optional, but we don't support
+ // writing that).
+ obu->header.obu_has_size_field = 1;
+
+ err = cbs_av1_write_obu_header(ctx, pbc, &obu->header);
+ if (err < 0)
+ return err;
+
+ if (obu->header.obu_has_size_field) {
+ pbc_tmp = *pbc;
+ // Add space for the size field to fill later.
+ put_bits32(pbc, 0);
+ put_bits32(pbc, 0);
+ }
+
+ td = NULL;
+ start_pos = put_bits_count(pbc);
+
+ switch (obu->header.obu_type) {
+ case AV1_OBU_SEQUENCE_HEADER:
+ {
+ err = cbs_av1_write_sequence_header_obu(ctx, pbc,
+ &obu->obu.sequence_header);
+ if (err < 0)
+ return err;
+
+ av_buffer_unref(&priv->sequence_header_ref);
+ priv->sequence_header = NULL;
+
+ priv->sequence_header_ref = av_buffer_ref(unit->content_ref);
+ if (!priv->sequence_header_ref)
+ return AVERROR(ENOMEM);
+ priv->sequence_header = &obu->obu.sequence_header;
+ }
+ break;
+ case AV1_OBU_TEMPORAL_DELIMITER:
+ {
+ err = cbs_av1_write_temporal_delimiter_obu(ctx, pbc);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_FRAME_HEADER:
+ case AV1_OBU_REDUNDANT_FRAME_HEADER:
+ {
+ err = cbs_av1_write_frame_header_obu(ctx, pbc,
+ &obu->obu.frame_header);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_TILE_GROUP:
+ {
+ err = cbs_av1_write_tile_group_obu(ctx, pbc,
+ &obu->obu.tile_group);
+ if (err < 0)
+ return err;
+
+ td = &obu->obu.tile_group.tile_data;
+ }
+ break;
+ case AV1_OBU_FRAME:
+ {
+ err = cbs_av1_write_frame_obu(ctx, pbc, &obu->obu.frame);
+ if (err < 0)
+ return err;
+
+ td = &obu->obu.frame.tile_group.tile_data;
+ }
+ break;
+ case AV1_OBU_TILE_LIST:
+ {
+ err = cbs_av1_write_tile_list_obu(ctx, pbc, &obu->obu.tile_list);
+ if (err < 0)
+ return err;
+
+ td = &obu->obu.tile_list.tile_data;
+ }
+ break;
+ case AV1_OBU_METADATA:
+ {
+ err = cbs_av1_write_metadata_obu(ctx, pbc, &obu->obu.metadata);
+ if (err < 0)
+ return err;
+ }
+ break;
+ case AV1_OBU_PADDING:
+ default:
+ return AVERROR(ENOSYS);
+ }
+
+ end_pos = put_bits_count(pbc);
+ header_size = (end_pos - start_pos + 7) / 8;
+ if (td) {
+ obu->obu_size = header_size + td->data_size;
+ } else if (header_size > 0) {
+ // Add trailing bits and recalculate.
+ err = cbs_av1_write_trailing_bits(ctx, pbc, 8 - end_pos % 8);
+ if (err < 0)
+ return err;
+ end_pos = put_bits_count(pbc);
+ obu->obu_size = (end_pos - start_pos + 7) / 8;
+ } else {
+ // Empty OBU.
+ obu->obu_size = 0;
+ }
+
+ end_pos = put_bits_count(pbc);
+ // Must now be byte-aligned.
+ av_assert0(end_pos % 8 == 0);
+ flush_put_bits(pbc);
+ start_pos /= 8;
+ end_pos /= 8;
+
+ *pbc = pbc_tmp;
+ err = cbs_av1_write_leb128(ctx, pbc, "obu_size", obu->obu_size);
+ if (err < 0)
+ return err;
+
+ data_pos = put_bits_count(pbc) / 8;
+ flush_put_bits(pbc);
+ av_assert0(data_pos <= start_pos);
+
+ if (8 * obu->obu_size > put_bits_left(pbc))
+ return AVERROR(ENOSPC);
+
+ if (obu->obu_size > 0) {
+ memmove(priv->write_buffer + data_pos,
+ priv->write_buffer + start_pos, header_size);
+ skip_put_bytes(pbc, header_size);
+
+ if (td) {
+ memcpy(priv->write_buffer + data_pos + header_size,
+ td->data, td->data_size);
+ skip_put_bytes(pbc, td->data_size);
+ }
+ }
+
+ return 0;
+}
+
+static int cbs_av1_write_unit(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ PutBitContext pbc;
+ int err;
+
+ if (!priv->write_buffer) {
+ // Initial write buffer size is 1MB.
+ priv->write_buffer_size = 1024 * 1024;
+
+ reallocate_and_try_again:
+ err = av_reallocp(&priv->write_buffer, priv->write_buffer_size);
+ if (err < 0) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Unable to allocate a "
+ "sufficiently large write buffer (last attempt "
+ "%zu bytes).\n", priv->write_buffer_size);
+ return err;
+ }
+ }
+
+ init_put_bits(&pbc, priv->write_buffer, priv->write_buffer_size);
+
+ err = cbs_av1_write_obu(ctx, unit, &pbc);
+ if (err == AVERROR(ENOSPC)) {
+ // Overflow.
+ priv->write_buffer_size *= 2;
+ goto reallocate_and_try_again;
+ }
+ if (err < 0)
+ return err;
+
+ // Overflow but we didn't notice.
+ av_assert0(put_bits_count(&pbc) <= 8 * priv->write_buffer_size);
+
+ // OBU data must be byte-aligned.
+ av_assert0(put_bits_count(&pbc) % 8 == 0);
+
+ unit->data_size = put_bits_count(&pbc) / 8;
+ flush_put_bits(&pbc);
+
+ err = ff_cbs_alloc_unit_data(ctx, unit, unit->data_size);
+ if (err < 0)
+ return err;
+
+ memcpy(unit->data, priv->write_buffer, unit->data_size);
+
+ return 0;
+}
+
+static int cbs_av1_assemble_fragment(CodedBitstreamContext *ctx,
+ CodedBitstreamFragment *frag)
+{
+ size_t size, pos;
+ int i;
+
+ size = 0;
+ for (i = 0; i < frag->nb_units; i++)
+ size += frag->units[i].data_size;
+
+ frag->data_ref = av_buffer_alloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!frag->data_ref)
+ return AVERROR(ENOMEM);
+ frag->data = frag->data_ref->data;
+ memset(frag->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+ pos = 0;
+ for (i = 0; i < frag->nb_units; i++) {
+ memcpy(frag->data + pos, frag->units[i].data,
+ frag->units[i].data_size);
+ pos += frag->units[i].data_size;
+ }
+ av_assert0(pos == size);
+ frag->data_size = size;
+
+ return 0;
+}
+
+static void cbs_av1_close(CodedBitstreamContext *ctx)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+
+ av_buffer_unref(&priv->sequence_header_ref);
+
+ av_freep(&priv->write_buffer);
+}
+
+const CodedBitstreamType ff_cbs_type_av1 = {
+ .codec_id = AV_CODEC_ID_AV1,
+
+ .priv_data_size = sizeof(CodedBitstreamAV1Context),
+
+ .split_fragment = &cbs_av1_split_fragment,
+ .read_unit = &cbs_av1_read_unit,
+ .write_unit = &cbs_av1_write_unit,
+ .assemble_fragment = &cbs_av1_assemble_fragment,
+
+ .close = &cbs_av1_close,
+};
diff --git a/libavcodec/cbs_av1.h b/libavcodec/cbs_av1.h
new file mode 100644
index 0000000000..0d7fd761f1
--- /dev/null
+++ b/libavcodec/cbs_av1.h
@@ -0,0 +1,429 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CBS_AV1_H
+#define AVCODEC_CBS_AV1_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "av1.h"
+#include "cbs.h"
+
+
+typedef struct AV1RawOBUHeader {
+ uint8_t obu_forbidden_bit;
+ uint8_t obu_type;
+ uint8_t obu_extension_flag;
+ uint8_t obu_has_size_field;
+ uint8_t obu_reserved_1bit;
+
+ uint8_t temporal_id;
+ uint8_t spatial_id;
+ uint8_t extension_header_reserved_3bits;
+} AV1RawOBUHeader;
+
+typedef struct AV1RawColorConfig {
+ uint8_t high_bitdepth;
+ uint8_t twelve_bit;
+ uint8_t mono_chrome;
+
+ uint8_t color_description_present_flag;
+ uint8_t color_primaries;
+ uint8_t transfer_characteristics;
+ uint8_t matrix_coefficients;
+
+ uint8_t color_range;
+ uint8_t subsampling_x;
+ uint8_t subsampling_y;
+ uint8_t chroma_sample_position;
+ uint8_t separate_uv_delta_q;
+} AV1RawColorConfig;
+
+typedef struct AV1RawTimingInfo {
+ uint32_t num_units_in_display_tick;
+ uint32_t time_scale;
+
+ uint8_t equal_picture_interval;
+ uint32_t num_ticks_per_picture_minus_1;
+} AV1RawTimingInfo;
+
+typedef struct AV1RawDecoderModelInfo {
+ uint8_t buffer_delay_length_minus_1;
+ uint32_t num_units_in_decoding_tick;
+ uint8_t buffer_removal_time_length_minus_1;
+ uint8_t frame_presentation_time_length_minus_1;
+} AV1RawDecoderModelInfo;
+
+typedef struct AV1RawSequenceHeader {
+ uint8_t seq_profile;
+ uint8_t still_picture;
+ uint8_t reduced_still_picture_header;
+
+ uint8_t timing_info_present_flag;
+ uint8_t decoder_model_info_present_flag;
+ uint8_t initial_display_delay_present_flag;
+ uint8_t operating_points_cnt_minus_1;
+
+ AV1RawTimingInfo timing_info;
+ AV1RawDecoderModelInfo decoder_model_info;
+
+ uint16_t operating_point_idc[AV1_MAX_OPERATING_POINTS];
+ uint8_t seq_level_idx[AV1_MAX_OPERATING_POINTS];
+ uint8_t seq_tier[AV1_MAX_OPERATING_POINTS];
+ uint8_t decoder_model_present_for_this_op[AV1_MAX_OPERATING_POINTS];
+ uint8_t decoder_buffer_delay[AV1_MAX_OPERATING_POINTS];
+ uint8_t encoder_buffer_delay[AV1_MAX_OPERATING_POINTS];
+ uint8_t low_delay_mode_flag[AV1_MAX_OPERATING_POINTS];
+ uint8_t initial_display_delay_present_for_this_op[AV1_MAX_OPERATING_POINTS];
+ uint8_t initial_display_delay_minus_1[AV1_MAX_OPERATING_POINTS];
+
+ uint8_t frame_width_bits_minus_1;
+ uint8_t frame_height_bits_minus_1;
+ uint16_t max_frame_width_minus_1;
+ uint16_t max_frame_height_minus_1;
+
+ uint8_t frame_id_numbers_present_flag;
+ uint8_t delta_frame_id_length_minus_2;
+ uint8_t additional_frame_id_length_minus_1;
+
+ uint8_t use_128x128_superblock;
+ uint8_t enable_filter_intra;
+ uint8_t enable_intra_edge_filter;
+ uint8_t enable_intraintra_compound;
+ uint8_t enable_masked_compound;
+ uint8_t enable_warped_motion;
+ uint8_t enable_dual_filter;
+
+ uint8_t enable_order_hint;
+ uint8_t enable_jnt_comp;
+ uint8_t enable_ref_frame_mvs;
+
+ uint8_t seq_choose_screen_content_tools;
+ uint8_t seq_force_screen_content_tools;
+ uint8_t seq_choose_integer_mv;
+ uint8_t seq_force_integer_mv;
+
+ uint8_t order_hint_bits_minus_1;
+
+ uint8_t enable_superres;
+ uint8_t enable_cdef;
+ uint8_t enable_restoration;
+
+ AV1RawColorConfig color_config;
+
+ uint8_t film_grain_params_present;
+} AV1RawSequenceHeader;
+
+typedef struct AV1RawFrameHeader {
+ uint8_t show_existing_frame;
+ uint8_t frame_to_show_map_idx;
+ uint32_t frame_presentation_time;
+ uint32_t display_frame_id;
+
+ uint8_t frame_type;
+ uint8_t show_frame;
+ uint8_t showable_frame;
+
+ uint8_t error_resilient_mode;
+ uint8_t disable_cdf_update;
+ uint8_t allow_screen_content_tools;
+ uint8_t force_integer_mv;
+
+ uint32_t current_frame_id;
+ uint8_t frame_size_override_flag;
+ uint8_t order_hint;
+
+ uint8_t buffer_removal_time_present_flag;
+ uint32_t buffer_removal_time[AV1_MAX_OPERATING_POINTS];
+
+ uint8_t primary_ref_frame;
+ uint16_t frame_width_minus_1;
+ uint16_t frame_height_minus_1;
+ uint8_t use_superres;
+ uint8_t coded_denom;
+ uint8_t render_and_frame_size_different;
+ uint8_t render_width_minus_1;
+ uint8_t render_height_minus_1;
+
+ uint8_t found_ref;
+
+ uint8_t refresh_frame_flags;
+ uint8_t allow_intrabc;
+ uint8_t ref_order_hint[AV1_NUM_REF_FRAMES];
+ uint8_t frame_refs_short_signaling;
+ uint8_t last_frame_idx;
+ uint8_t golden_frame_idx;
+ int8_t ref_frame_idx[AV1_REFS_PER_FRAME];
+ uint8_t delta_frame_id_minus1;
+
+ uint8_t allow_high_precision_mv;
+ uint8_t is_filter_switchable;
+ uint8_t interpolation_filter;
+ uint8_t is_motion_mode_switchable;
+ uint8_t use_ref_frame_mvs;
+
+ uint8_t disable_frame_end_update_cdf;
+
+ uint8_t uniform_tile_spacing_flag;
+ uint8_t tile_cols_log2;
+ uint8_t tile_rows_log2;
+ uint8_t width_in_sbs_minus_1[AV1_MAX_TILE_COLS];
+ uint8_t height_in_sbs_minus_1[AV1_MAX_TILE_ROWS];
+ uint16_t context_update_tile_id;
+ uint8_t tile_size_bytes_minus1;
+
+ // These are derived values, but it's very unhelpful to have to
+ // recalculate them all the time so we store them here.
+ uint16_t tile_cols;
+ uint16_t tile_rows;
+
+ uint8_t base_q_idx;
+ int8_t delta_q_y_dc;
+ uint8_t diff_uv_delta;
+ int8_t delta_q_u_dc;
+ int8_t delta_q_u_ac;
+ int8_t delta_q_v_dc;
+ int8_t delta_q_v_ac;
+ uint8_t using_qmatrix;
+ uint8_t qm_y;
+ uint8_t qm_u;
+ uint8_t qm_v;
+
+ uint8_t segmentation_enabled;
+ uint8_t segmentation_update_map;
+ uint8_t segmentation_temporal_update;
+ uint8_t segmentation_update_data;
+ uint8_t feature_enabled[AV1_MAX_SEGMENTS][AV1_SEG_LVL_MAX];
+ uint8_t feature_value[AV1_MAX_SEGMENTS][AV1_SEG_LVL_MAX];
+
+ uint8_t delta_q_present;
+ uint8_t delta_q_res;
+ uint8_t delta_lf_present;
+ uint8_t delta_lf_res;
+ uint8_t delta_lf_multi;
+
+ uint8_t loop_filter_level[4];
+ uint8_t loop_filter_sharpness;
+ uint8_t loop_filter_delta_enabled;
+ uint8_t loop_filter_delta_update;
+ uint8_t update_ref_delta[AV1_TOTAL_REFS_PER_FRAME];
+ int8_t loop_filter_ref_deltas[AV1_TOTAL_REFS_PER_FRAME];
+ uint8_t update_mode_delta[2];
+ int8_t loop_filter_mode_deltas[2];
+
+ uint8_t cdef_damping_minus_3;
+ uint8_t cdef_bits;
+ uint8_t cdef_y_pri_strength[8];
+ uint8_t cdef_y_sec_strength[8];
+ uint8_t cdef_uv_pri_strength[8];
+ uint8_t cdef_uv_sec_strength[8];
+
+ uint8_t lr_type[3];
+ uint8_t lr_unit_shift;
+ uint8_t lr_uv_shift;
+
+ uint8_t tx_mode;
+ uint8_t reference_select;
+ uint8_t skip_mode_present;
+
+ uint8_t allow_warped_motion;
+ uint8_t reduced_tx_set;
+
+ uint8_t is_global[AV1_TOTAL_REFS_PER_FRAME];
+ uint8_t is_rot_zoom[AV1_TOTAL_REFS_PER_FRAME];
+ uint8_t is_translation[AV1_TOTAL_REFS_PER_FRAME];
+ //AV1RawSubexp gm_params[AV1_TOTAL_REFS_PER_FRAME][6];
+ uint32_t gm_params[AV1_TOTAL_REFS_PER_FRAME][6];
+
+ uint8_t apply_grain;
+ uint16_t grain_seed;
+ uint8_t update_grain;
+ uint8_t film_grain_params_ref_idx;
+ uint8_t num_y_points;
+ uint8_t point_y_value[16];
+ uint8_t point_y_scaling[16];
+ uint8_t chroma_scaling_from_luma;
+ uint8_t num_cb_points;
+ uint8_t point_cb_value[16];
+ uint8_t point_cb_scaling[16];
+ uint8_t num_cr_points;
+ uint8_t point_cr_value[16];
+ uint8_t point_cr_scaling[16];
+ uint8_t grain_scaling_minus_8;
+ uint8_t ar_coeff_lag;
+ uint8_t ar_coeffs_y_plus_128[24];
+ uint8_t ar_coeffs_cb_plus_128[24];
+ uint8_t ar_coeffs_cr_plus_128[24];
+ uint8_t ar_coeff_shift_minus_6;
+ uint8_t grain_scale_shift;
+ uint8_t cb_mult;
+ uint8_t cb_luma_mult;
+ uint16_t cb_offset;
+ uint8_t cr_mult;
+ uint8_t cr_luma_mult;
+ uint16_t cr_offset;
+ uint8_t overlap_flag;
+ uint8_t clip_to_restricted_range;
+} AV1RawFrameHeader;
+
+typedef struct AV1RawTileData {
+ uint8_t *data;
+ size_t data_size;
+ AVBufferRef *data_ref;
+} AV1RawTileData;
+
+typedef struct AV1RawTileGroup {
+ uint8_t tile_start_and_end_present_flag;
+ uint16_t tg_start;
+ uint16_t tg_end;
+
+ AV1RawTileData tile_data;
+} AV1RawTileGroup;
+
+typedef struct AV1RawFrame {
+ AV1RawFrameHeader header;
+ AV1RawTileGroup tile_group;
+} AV1RawFrame;
+
+typedef struct AV1RawTileList {
+ uint8_t output_frame_width_in_tiles_minus_1;
+ uint8_t output_frame_height_in_tiles_minus_1;
+ uint16_t tile_count_minus_1;
+
+ AV1RawTileData tile_data;
+} AV1RawTileList;
+
+typedef struct AV1RawMetadataHDRCLL {
+ uint16_t max_cll;
+ uint16_t max_fall;
+} AV1RawMetadataHDRCLL;
+
+typedef struct AV1RawMetadataHDRMDCV {
+ uint16_t primary_chromaticity_x[3];
+ uint16_t primary_chromaticity_y[3];
+ uint16_t white_point_chromaticity_x;
+ uint16_t white_point_chromaticity_y;
+ uint32_t luminance_max;
+ uint32_t luminance_min;
+} AV1RawMetadataHDRMDCV;
+
+typedef struct AV1RawMetadataScalability {
+ uint8_t scalability_mode_idc;
+ // TODO: more stuff.
+} AV1RawMetadataScalability;
+
+typedef struct AV1RawMetadataITUTT35 {
+ uint8_t itu_t_t35_country_code;
+ uint8_t itu_t_t35_country_code_extension_byte;
+
+ uint8_t *payload;
+ size_t payload_size;
+ AVBufferRef *payload_ref;
+} AV1RawMetadataITUTT35;
+
+typedef struct AV1RawMetadataTimecode {
+ uint8_t counting_type;
+ uint8_t full_timestamp_flag;
+ uint8_t discontinuity_flag;
+ uint8_t cnt_dropped_flag;
+ uint16_t n_frames;
+ uint8_t seconds_value;
+ uint8_t minutes_value;
+ uint8_t hours_value;
+ uint8_t seconds_flag;
+ uint8_t minutes_flag;
+ uint8_t hours_flag;
+ uint8_t time_offset_length;
+ uint32_t time_offset_value;
+} AV1RawMetadataTimecode;
+
+typedef struct AV1RawMetadata {
+ uint64_t metadata_type;
+ union {
+ AV1RawMetadataHDRCLL hdr_cll;
+ AV1RawMetadataHDRMDCV hdr_mdcv;
+ AV1RawMetadataScalability scalability;
+ AV1RawMetadataITUTT35 itut_t35;
+ AV1RawMetadataTimecode timecode;
+ } metadata;
+} AV1RawMetadata;
+
+
+typedef struct AV1RawOBU {
+ AV1RawOBUHeader header;
+
+ size_t obu_size;
+
+ union {
+ AV1RawSequenceHeader sequence_header;
+ AV1RawFrameHeader frame_header;
+ AV1RawFrame frame;
+ AV1RawTileGroup tile_group;
+ AV1RawTileList tile_list;
+ AV1RawMetadata metadata;
+ } obu;
+} AV1RawOBU;
+
+typedef struct AV1ReferenceFrameState {
+ int valid; // RefValid
+ int frame_id; // RefFrameId
+ int upscaled_width; // RefUpscaledWidth
+ int frame_width; // RefFrameWidth
+ int frame_height; // RefFrameHeight
+ int render_width; // RefRenderWidth
+ int render_height; // RefRenderHeight
+ int frame_type; // RefFrameType
+ int subsampling_x; // RefSubsamplingX
+ int subsampling_y; // RefSubsamplingY
+ int bit_depth; // RefBitDepth
+ int order_hint; // RefOrderHint
+} AV1ReferenceFrameState;
+
+typedef struct CodedBitstreamAV1Context {
+ AV1RawSequenceHeader *sequence_header;
+ AVBufferRef *sequence_header_ref;
+
+ int seen_frame_header;
+
+ int temporal_id;
+ int spatial_id;
+ int operating_point_idc;
+
+ int bit_depth;
+ int frame_width;
+ int frame_height;
+ int upscaled_width;
+ int render_width;
+ int render_height;
+
+ int num_planes;
+ int coded_lossless;
+ int all_lossless;
+ int tile_cols;
+ int tile_rows;
+
+ AV1ReferenceFrameState ref[AV1_NUM_REF_FRAMES];
+
+ // Write buffer.
+ uint8_t *write_buffer;
+ size_t write_buffer_size;
+} CodedBitstreamAV1Context;
+
+
+#endif /* AVCODEC_CBS_AV1_H */
diff --git a/libavcodec/cbs_av1_syntax_template.c b/libavcodec/cbs_av1_syntax_template.c
new file mode 100644
index 0000000000..84ab2973ab
--- /dev/null
+++ b/libavcodec/cbs_av1_syntax_template.c
@@ -0,0 +1,1694 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+static int FUNC(obu_header)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawOBUHeader *current)
+{
+ int err;
+ av_unused int zero = 0;
+
+ HEADER("OBU header");
+
+ fc(1, obu_forbidden_bit, 0, 0);
+
+ fc(4, obu_type, 0, AV1_OBU_PADDING);
+ flag(obu_extension_flag);
+ flag(obu_has_size_field);
+
+ fc(1, obu_reserved_1bit, 0, 0);
+
+ if (current->obu_extension_flag) {
+ fb(3, temporal_id);
+ fb(2, spatial_id);
+ fc(3, extension_header_reserved_3bits, 0, 0);
+ }
+
+ return 0;
+}
+
+static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw, int nb_bits)
+{
+ int err;
+
+ av_assert0(nb_bits > 0);
+
+ fixed(1, trailing_one_bit, 1);
+ --nb_bits;
+
+ while (nb_bits > 0) {
+ fixed(1, trailing_zero_bit, 0);
+ --nb_bits;
+ }
+
+ return 0;
+}
+
+static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
+{
+ int err;
+
+ while (byte_alignment(rw) != 0)
+ fixed(1, zero_bit, 0);
+
+ return 0;
+}
+
+static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawColorConfig *current, int seq_profile)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int err;
+
+ flag(high_bitdepth);
+
+ if (seq_profile == FF_PROFILE_AV1_PROFESSIONAL &&
+ current->high_bitdepth) {
+ flag(twelve_bit);
+ priv->bit_depth = current->twelve_bit ? 12 : 10;
+ } else {
+ priv->bit_depth = current->high_bitdepth ? 10 : 8;
+ }
+
+ if (seq_profile == FF_PROFILE_AV1_HIGH)
+ infer(mono_chrome, 0);
+ else
+ flag(mono_chrome);
+ priv->num_planes = current->mono_chrome ? 1 : 3;
+
+ flag(color_description_present_flag);
+ if (current->color_description_present_flag) {
+ fb(8, color_primaries);
+ fb(8, transfer_characteristics);
+ fb(8, matrix_coefficients);
+ } else {
+ infer(color_primaries, AVCOL_PRI_UNSPECIFIED);
+ infer(transfer_characteristics, AVCOL_TRC_UNSPECIFIED);
+ infer(matrix_coefficients, AVCOL_SPC_UNSPECIFIED);
+ }
+
+ if (current->mono_chrome) {
+ flag(color_range);
+
+ infer(subsampling_x, 1);
+ infer(subsampling_y, 1);
+ infer(chroma_sample_position, AV1_CSP_UNKNOWN);
+ infer(separate_uv_delta_q, 0);
+
+ } else if (current->color_primaries == AVCOL_PRI_BT709 &&
+ current->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
+ current->matrix_coefficients == AVCOL_SPC_RGB) {
+ infer(color_range, 1);
+ infer(subsampling_x, 0);
+ infer(subsampling_y, 0);
+ flag(separate_uv_delta_q);
+
+ } else {
+ flag(color_range);
+
+ if (seq_profile == FF_PROFILE_AV1_MAIN) {
+ infer(subsampling_x, 1);
+ infer(subsampling_y, 1);
+ } else if (seq_profile == FF_PROFILE_AV1_HIGH) {
+ infer(subsampling_x, 0);
+ infer(subsampling_y, 0);
+ } else {
+ if (priv->bit_depth == 12) {
+ fb(1, subsampling_x);
+ if (current->subsampling_x)
+ fb(1, subsampling_y);
+ else
+ infer(subsampling_y, 0);
+ } else {
+ infer(subsampling_x, 1);
+ infer(subsampling_y, 0);
+ }
+ }
+ if (current->subsampling_x && current->subsampling_y) {
+ fc(2, chroma_sample_position, AV1_CSP_UNKNOWN,
+ AV1_CSP_COLOCATED);
+ }
+
+ flag(separate_uv_delta_q);
+ }
+
+ return 0;
+}
+
+static int FUNC(timing_info)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawTimingInfo *current)
+{
+ int err;
+
+ fc(32, num_units_in_display_tick, 1, MAX_UINT_BITS(32));
+ fc(32, time_scale, 1, MAX_UINT_BITS(32));
+
+ flag(equal_picture_interval);
+ if (current->equal_picture_interval)
+ uvlc(num_ticks_per_picture_minus_1, 0, MAX_UINT_BITS(32) - 1);
+
+ return 0;
+}
+
+static int FUNC(decoder_model_info)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawDecoderModelInfo *current)
+{
+ int err;
+
+ fb(5, buffer_delay_length_minus_1);
+ fb(32, num_units_in_decoding_tick);
+ fb(5, buffer_removal_time_length_minus_1);
+ fb(5, frame_presentation_time_length_minus_1);
+
+ return 0;
+}
+
+static int FUNC(sequence_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawSequenceHeader *current)
+{
+ int i, err;
+
+ HEADER("Sequence Header");
+
+ fc(3, seq_profile, FF_PROFILE_AV1_MAIN,
+ FF_PROFILE_AV1_PROFESSIONAL);
+ flag(still_picture);
+ flag(reduced_still_picture_header);
+
+ if (current->reduced_still_picture_header) {
+ infer(timing_info_present_flag, 0);
+ infer(decoder_model_info_present_flag, 0);
+ infer(initial_display_delay_present_flag, 0);
+ infer(operating_points_cnt_minus_1, 0);
+ infer(operating_point_idc[0], 0);
+
+ fb(5, seq_level_idx[0]);
+
+ infer(seq_tier[0], 0);
+ infer(decoder_model_present_for_this_op[0], 0);
+ infer(initial_display_delay_present_for_this_op[0], 0);
+
+ } else {
+ flag(timing_info_present_flag);
+ if (current->timing_info_present_flag) {
+ CHECK(FUNC(timing_info)(ctx, rw, &current->timing_info));
+
+ flag(decoder_model_info_present_flag);
+ if (current->decoder_model_info_present_flag) {
+ CHECK(FUNC(decoder_model_info)
+ (ctx, rw, &current->decoder_model_info));
+ }
+ } else {
+ infer(decoder_model_info_present_flag, 0);
+ }
+
+ flag(initial_display_delay_present_flag);
+
+ fb(5, operating_points_cnt_minus_1);
+ for (i = 0; i <= current->operating_points_cnt_minus_1; i++) {
+ fbs(12, operating_point_idc[i], 1, i);
+ fbs(5, seq_level_idx[i], 1, i);
+
+ if (current->seq_level_idx[i] > 7)
+ flags(seq_tier[i], 1, i);
+ else
+ infer(seq_tier[i], 0);
+
+ if (current->decoder_model_info_present_flag) {
+ flags(decoder_model_present_for_this_op[i], 1, i);
+ if (current->decoder_model_present_for_this_op[i]) {
+ int n = current->decoder_model_info.buffer_delay_length_minus_1 + 1;
+ fbs(n, decoder_buffer_delay[i], 1, i);
+ fbs(n, encoder_buffer_delay[i], 1, i);
+ flags(low_delay_mode_flag[i], 1, i);
+ }
+ } else {
+ infer(decoder_model_present_for_this_op[i], 0);
+ }
+
+ if (current->initial_display_delay_present_flag) {
+ flags(initial_display_delay_present_for_this_op[i], 1, i);
+ if (current->initial_display_delay_present_for_this_op[i])
+ fbs(4, initial_display_delay_minus_1[i], 1, i);
+ }
+ }
+ }
+
+ fb(4, frame_width_bits_minus_1);
+ fb(4, frame_height_bits_minus_1);
+
+ fb(current->frame_width_bits_minus_1 + 1, max_frame_width_minus_1);
+ fb(current->frame_height_bits_minus_1 + 1, max_frame_height_minus_1);
+
+ if (current->reduced_still_picture_header)
+ infer(frame_id_numbers_present_flag, 0);
+ else
+ flag(frame_id_numbers_present_flag);
+ if (current->frame_id_numbers_present_flag) {
+ fb(4, delta_frame_id_length_minus_2);
+ fb(3, additional_frame_id_length_minus_1);
+ }
+
+ flag(use_128x128_superblock);
+ flag(enable_filter_intra);
+ flag(enable_intra_edge_filter);
+
+ if (current->reduced_still_picture_header) {
+ infer(enable_intraintra_compound, 0);
+ infer(enable_masked_compound, 0);
+ infer(enable_warped_motion, 0);
+ infer(enable_dual_filter, 0);
+ infer(enable_order_hint, 0);
+ infer(enable_jnt_comp, 0);
+ infer(enable_ref_frame_mvs, 0);
+
+ infer(seq_force_screen_content_tools,
+ AV1_SELECT_SCREEN_CONTENT_TOOLS);
+ infer(seq_force_integer_mv,
+ AV1_SELECT_INTEGER_MV);
+ } else {
+ flag(enable_intraintra_compound);
+ flag(enable_masked_compound);
+ flag(enable_warped_motion);
+ flag(enable_dual_filter);
+
+ flag(enable_order_hint);
+ if (current->enable_order_hint) {
+ flag(enable_jnt_comp);
+ flag(enable_ref_frame_mvs);
+ } else {
+ infer(enable_jnt_comp, 0);
+ infer(enable_ref_frame_mvs, 0);
+ }
+
+ flag(seq_choose_screen_content_tools);
+ if (current->seq_choose_screen_content_tools)
+ infer(seq_force_screen_content_tools,
+ AV1_SELECT_SCREEN_CONTENT_TOOLS);
+ else
+ fb(1, seq_force_screen_content_tools);
+ if (current->seq_force_screen_content_tools > 0) {
+ flag(seq_choose_integer_mv);
+ if (current->seq_choose_integer_mv)
+ infer(seq_force_integer_mv,
+ AV1_SELECT_INTEGER_MV);
+ else
+ fb(1, seq_force_integer_mv);
+ } else {
+ infer(seq_force_integer_mv, AV1_SELECT_INTEGER_MV);
+ }
+
+ if (current->enable_order_hint)
+ fb(3, order_hint_bits_minus_1);
+ }
+
+ flag(enable_superres);
+ flag(enable_cdef);
+ flag(enable_restoration);
+
+ CHECK(FUNC(color_config)(ctx, rw, &current->color_config,
+ current->seq_profile));
+
+ flag(film_grain_params_present);
+
+ return 0;
+}
+
+static int FUNC(temporal_delimiter_obu)(CodedBitstreamContext *ctx, RWContext *rw)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+
+ HEADER("Temporal Delimiter");
+
+ priv->seen_frame_header = 0;
+
+ return 0;
+}
+
+static int FUNC(superres_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int denom, err;
+
+ if (seq->enable_superres)
+ flag(use_superres);
+ else
+ infer(use_superres, 0);
+
+ if (current->use_superres) {
+ fb(3, coded_denom);
+ denom = current->coded_denom + AV1_SUPERRES_DENOM_MIN;
+ } else {
+ denom = AV1_SUPERRES_NUM;
+ }
+
+ priv->upscaled_width = priv->frame_width;
+ priv->frame_width = (priv->upscaled_width * AV1_SUPERRES_NUM +
+ denom / 2) / denom;
+
+ return 0;
+}
+
+static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int err;
+
+ if (current->frame_size_override_flag) {
+ fb(seq->frame_width_bits_minus_1 + 1, frame_width_minus_1);
+ fb(seq->frame_height_bits_minus_1 + 1, frame_height_minus_1);
+
+ priv->frame_width = current->frame_width_minus_1 + 1;
+ priv->frame_height = current->frame_height_minus_1 + 1;
+ } else {
+ priv->frame_width = seq->max_frame_width_minus_1 + 1;
+ priv->frame_height = seq->max_frame_height_minus_1 + 1;
+ }
+
+ CHECK(FUNC(superres_params)(ctx, rw, current));
+
+ return 0;
+}
+
+static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int err;
+
+ flag(render_and_frame_size_different);
+
+ if (current->render_and_frame_size_different) {
+ fb(16, render_width_minus_1);
+ fb(16, render_height_minus_1);
+
+ priv->render_width = current->render_width_minus_1 + 1;
+ priv->render_height = current->render_height_minus_1 + 1;
+ } else {
+ priv->render_width = priv->upscaled_width;
+ priv->render_height = priv->frame_height;
+ }
+
+ return 0;
+}
+
+static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int i, err;
+
+ for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
+ flag(found_ref);
+ if (current->found_ref) {
+ AV1ReferenceFrameState *ref =
+ &priv->ref[current->ref_frame_idx[i]];
+
+ if (!ref->valid) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR,
+ "Missing reference frame needed for frame size "
+ "(ref = %d, ref_frame_idx = %d).\n",
+ i, current->ref_frame_idx[i]);
+ return AVERROR_INVALIDDATA;
+ }
+
+ priv->upscaled_width = ref->upscaled_width;
+ priv->frame_width = ref->frame_width;
+ priv->frame_height = ref->frame_height;
+ priv->render_width = ref->render_width;
+ priv->render_height = ref->render_height;
+ break;
+ }
+ }
+
+ if (current->found_ref == 0) {
+ CHECK(FUNC(frame_size)(ctx, rw, current));
+ CHECK(FUNC(render_size)(ctx, rw, current));
+ } else {
+ CHECK(FUNC(superres_params)(ctx, rw, current));
+ }
+
+ return 0;
+}
+
+static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ int err;
+
+ flag(is_filter_switchable);
+ if (current->is_filter_switchable)
+ infer(interpolation_filter,
+ AV1_INTERPOLATION_FILTER_SWITCHABLE);
+ else
+ fb(2, interpolation_filter);
+
+ return 0;
+}
+
+static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int mi_cols, mi_rows, sb_cols, sb_rows, sb_shift, sb_size;
+ int max_tile_width_sb, max_tile_height_sb, max_tile_area_sb;
+ int min_log2_tile_cols, max_log2_tile_cols, max_log2_tile_rows;
+ int min_log2_tiles, min_log2_tile_rows;
+ int i, err;
+
+ mi_cols = 2 * ((priv->frame_width + 7) >> 3);
+ mi_rows = 2 * ((priv->frame_height + 7) >> 3);
+
+ sb_cols = seq->use_128x128_superblock ? ((mi_cols + 31) >> 5)
+ : ((mi_cols + 15) >> 4);
+ sb_rows = seq->use_128x128_superblock ? ((mi_rows + 31) >> 5)
+ : ((mi_rows + 15) >> 4);
+
+ sb_shift = seq->use_128x128_superblock ? 5 : 4;
+ sb_size = sb_shift + 2;
+
+ max_tile_width_sb = AV1_MAX_TILE_WIDTH >> sb_size;
+ max_tile_area_sb = AV1_MAX_TILE_AREA >> (2 * sb_size);
+
+ min_log2_tile_cols = cbs_av1_tile_log2(max_tile_width_sb, sb_cols);
+ max_log2_tile_cols = cbs_av1_tile_log2(1, FFMIN(sb_cols, AV1_MAX_TILE_COLS));
+ max_log2_tile_rows = cbs_av1_tile_log2(1, FFMIN(sb_rows, AV1_MAX_TILE_ROWS));
+ min_log2_tiles = FFMAX(min_log2_tile_cols,
+ cbs_av1_tile_log2(max_tile_area_sb, sb_rows * sb_cols));
+
+ flag(uniform_tile_spacing_flag);
+
+ if (current->uniform_tile_spacing_flag) {
+ int tile_width_sb, tile_height_sb;
+
+ increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
+
+ tile_width_sb = (sb_cols + (1 << current->tile_cols_log2) - 1) >>
+ current->tile_cols_log2;
+ current->tile_cols = (sb_cols + tile_width_sb - 1) / tile_width_sb;
+
+ min_log2_tile_rows = FFMAX(min_log2_tiles - current->tile_cols_log2, 0);
+
+ increment(tile_rows_log2, min_log2_tile_rows, max_log2_tile_rows);
+
+ tile_height_sb = (sb_rows + (1 << current->tile_rows_log2) - 1) >>
+ current->tile_rows_log2;
+ current->tile_rows = (sb_rows + tile_height_sb - 1) / tile_height_sb;
+
+ } else {
+ int widest_tile_sb, start_sb, size_sb, max_width, max_height;
+
+ widest_tile_sb = 0;
+
+ start_sb = 0;
+ for (i = 0; start_sb < sb_cols && i < AV1_MAX_TILE_COLS; i++) {
+ max_width = FFMIN(sb_cols - start_sb, max_tile_width_sb);
+ ns(max_width, width_in_sbs_minus_1[i], 1, i);
+ size_sb = current->width_in_sbs_minus_1[i] + 1;
+ widest_tile_sb = FFMAX(size_sb, widest_tile_sb);
+ start_sb += size_sb;
+ }
+ current->tile_cols_log2 = cbs_av1_tile_log2(1, i);
+ current->tile_cols = i;
+
+ if (min_log2_tiles > 0)
+ max_tile_area_sb = (sb_rows * sb_cols) >> (min_log2_tiles + 1);
+ else
+ max_tile_area_sb = sb_rows * sb_cols;
+ max_tile_height_sb = FFMAX(max_tile_area_sb / widest_tile_sb, 1);
+
+ start_sb = 0;
+ for (i = 0; start_sb < sb_rows && i < AV1_MAX_TILE_ROWS; i++) {
+ max_height = FFMIN(sb_rows - start_sb, max_tile_height_sb);
+ ns(max_height, height_in_sbs_minus_1[i], 1, i);
+ size_sb = current->height_in_sbs_minus_1[i] + 1;
+ start_sb += size_sb;
+ }
+ current->tile_rows_log2 = cbs_av1_tile_log2(1, i);
+ current->tile_rows = i;
+ }
+
+ if (current->tile_cols_log2 > 0 ||
+ current->tile_rows_log2 > 0) {
+ fb(current->tile_cols_log2 + current->tile_rows_log2,
+ context_update_tile_id);
+ fb(2, tile_size_bytes_minus1);
+ } else {
+ infer(context_update_tile_id, 0);
+ }
+
+ priv->tile_cols = current->tile_cols;
+ priv->tile_rows = current->tile_rows;
+
+ return 0;
+}
+
+static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int err;
+
+ fb(8, base_q_idx);
+
+ delta_q(delta_q_y_dc);
+
+ if (priv->num_planes > 1) {
+ if (seq->color_config.separate_uv_delta_q)
+ flag(diff_uv_delta);
+ else
+ infer(diff_uv_delta, 0);
+
+ delta_q(delta_q_u_dc);
+ delta_q(delta_q_u_ac);
+
+ if (current->diff_uv_delta) {
+ delta_q(delta_q_v_dc);
+ delta_q(delta_q_v_ac);
+ } else {
+ infer(delta_q_v_dc, current->delta_q_u_dc);
+ infer(delta_q_v_ac, current->delta_q_u_ac);
+ }
+ } else {
+ infer(delta_q_u_dc, 0);
+ infer(delta_q_u_ac, 0);
+ infer(delta_q_v_dc, 0);
+ infer(delta_q_v_ac, 0);
+ }
+
+ flag(using_qmatrix);
+ if (current->using_qmatrix) {
+ fb(4, qm_y);
+ fb(4, qm_u);
+ if (seq->color_config.separate_uv_delta_q)
+ fb(4, qm_v);
+ else
+ infer(qm_v, current->qm_u);
+ }
+
+ return 0;
+}
+
+static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ static const uint8_t bits[AV1_SEG_LVL_MAX] = { 8, 6, 6, 6, 6, 3, 0, 0 };
+ static const uint8_t sign[AV1_SEG_LVL_MAX] = { 1, 1, 1, 1, 1, 0, 0, 0 };
+ int i, j, err;
+
+ flag(segmentation_enabled);
+
+ if (current->segmentation_enabled) {
+ if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
+ infer(segmentation_update_map, 1);
+ infer(segmentation_temporal_update, 0);
+ infer(segmentation_update_data, 1);
+ } else {
+ flag(segmentation_update_map);
+ if (current->segmentation_update_map)
+ flag(segmentation_temporal_update);
+ else
+ infer(segmentation_temporal_update, 0);
+ flag(segmentation_update_data);
+ }
+
+ if (current->segmentation_update_data) {
+ for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
+ for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
+ flags(feature_enabled[i][j], 2, i, j);
+
+ if (current->feature_enabled[i][j] && bits[j] > 0) {
+ if (sign[j])
+ sus(1 + bits[j], feature_value[i][j], 2, i, j);
+ else
+ fbs(bits[j], feature_value[i][j], 2, i, j);
+ } else {
+ infer(feature_value[i][j], 0);
+ }
+ }
+ }
+ }
+ } else {
+ for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
+ for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
+ infer(feature_enabled[i][j], 0);
+ infer(feature_value[i][j], 0);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(delta_q_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ int err;
+
+ if (current->base_q_idx > 0)
+ flag(delta_q_present);
+ else
+ infer(delta_q_present, 0);
+
+ if (current->delta_q_present)
+ fb(2, delta_q_res);
+
+ return 0;
+}
+
+static int FUNC(delta_lf_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ int err;
+
+ if (current->delta_q_present) {
+ if (!current->allow_intrabc)
+ flag(delta_lf_present);
+ else
+ infer(delta_lf_present, 0);
+ if (current->delta_lf_present) {
+ fb(2, delta_lf_res);
+ flag(delta_lf_multi);
+ } else {
+ infer(delta_lf_res, 0);
+ infer(delta_lf_multi, 0);
+ }
+ } else {
+ infer(delta_lf_present, 0);
+ infer(delta_lf_res, 0);
+ infer(delta_lf_multi, 0);
+ }
+
+ return 0;
+}
+
+static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int i, err;
+
+ if (priv->coded_lossless || current->allow_intrabc) {
+ infer(loop_filter_level[0], 0);
+ infer(loop_filter_level[1], 0);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_INTRA], 1);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST], 0);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST2], 0);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST3], 0);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_BWDREF], 0);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_GOLDEN], -1);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF], -1);
+ infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF2], -1);
+ for (i = 0; i < 2; i++)
+ infer(loop_filter_mode_deltas[i], 0);
+ return 0;
+ }
+
+ fb(6, loop_filter_level[0]);
+ fb(6, loop_filter_level[1]);
+
+ if (priv->num_planes > 1) {
+ if (current->loop_filter_level[0] ||
+ current->loop_filter_level[1]) {
+ fb(6, loop_filter_level[2]);
+ fb(6, loop_filter_level[3]);
+ }
+ }
+
+ fb(3, loop_filter_sharpness);
+
+ flag(loop_filter_delta_enabled);
+ if (current->loop_filter_delta_enabled) {
+ flag(loop_filter_delta_update);
+ if (current->loop_filter_delta_update) {
+ for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
+ flags(update_ref_delta[i], 1, i);
+ if (current->update_ref_delta[i])
+ sus(1 + 6, loop_filter_ref_deltas[i], 1, i);
+ }
+ for (i = 0; i < 2; i++) {
+ flags(update_mode_delta[i], 1, i);
+ if (current->update_mode_delta[i])
+ sus(1 + 6, loop_filter_mode_deltas[i], 1, i);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(cdef_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int i, err;
+
+ if (priv->coded_lossless || current->allow_intrabc ||
+ !seq->enable_cdef) {
+ infer(cdef_damping_minus_3, 0);
+ infer(cdef_bits, 0);
+ infer(cdef_y_pri_strength[0], 0);
+ infer(cdef_y_sec_strength[0], 0);
+ infer(cdef_uv_pri_strength[0], 0);
+ infer(cdef_uv_sec_strength[0], 0);
+
+ return 0;
+ }
+
+ fb(2, cdef_damping_minus_3);
+ fb(2, cdef_bits);
+
+ for (i = 0; i < (1 << current->cdef_bits); i++) {
+ fbs(4, cdef_y_pri_strength[i], 1, i);
+ fbs(2, cdef_y_sec_strength[i], 1, i);
+
+ if (priv->num_planes > 1) {
+ fbs(4, cdef_uv_pri_strength[i], 1, i);
+ fbs(2, cdef_uv_sec_strength[i], 1, i);
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(lr_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int uses_lr, uses_chroma_lr;
+ int i, err;
+
+ if (priv->all_lossless || current->allow_intrabc ||
+ !seq->enable_restoration) {
+ return 0;
+ }
+
+ uses_lr = uses_chroma_lr = 0;
+ for (i = 0; i < priv->num_planes; i++) {
+ fbs(2, lr_type[i], 1, i);
+
+ if (current->lr_type[i] != 0) {
+ uses_lr = 1;
+ if (i > 0)
+ uses_chroma_lr = 1;
+ }
+ }
+
+ if (uses_lr) {
+ if (seq->use_128x128_superblock)
+ increment(lr_unit_shift, 1, 2);
+ else
+ increment(lr_unit_shift, 0, 2);
+
+ if(seq->color_config.subsampling_x &&
+ seq->color_config.subsampling_y && uses_chroma_lr) {
+ fb(1, lr_uv_shift);
+ } else {
+ infer(lr_uv_shift, 0);
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(read_tx_mode)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int err;
+
+ if (priv->coded_lossless)
+ infer(tx_mode, 0);
+ else
+ increment(tx_mode, 1, 2);
+
+ return 0;
+}
+
+static int FUNC(frame_reference_mode)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ int err;
+
+ if (current->frame_type == AV1_FRAME_INTRA_ONLY ||
+ current->frame_type == AV1_FRAME_KEY)
+ infer(reference_select, 0);
+ else
+ flag(reference_select);
+
+ return 0;
+}
+
+static int FUNC(skip_mode_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int skip_mode_allowed;
+ int err;
+
+ if (current->frame_type == AV1_FRAME_KEY ||
+ current->frame_type == AV1_FRAME_INTRA_ONLY ||
+ !current->reference_select || !seq->enable_order_hint) {
+ skip_mode_allowed = 0;
+ } else {
+ int forward_idx, backward_idx;
+ int forward_hint, backward_hint;
+ int ref_hint, dist, i;
+
+ forward_idx = -1;
+ backward_idx = -1;
+ for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
+ ref_hint = priv->ref[i].order_hint;
+ dist = cbs_av1_get_relative_dist(seq, ref_hint,
+ current->order_hint);
+ if (dist < 0) {
+ if (forward_idx < 0 ||
+ cbs_av1_get_relative_dist(seq, ref_hint,
+ forward_hint) > 0) {
+ forward_idx = i;
+ forward_hint = ref_hint;
+ }
+ } else if (dist > 0) {
+ if (backward_idx < 0 ||
+ cbs_av1_get_relative_dist(seq, ref_hint,
+ backward_hint) < 0) {
+ backward_idx = i;
+ backward_hint = ref_hint;
+ }
+ }
+ }
+
+ if (forward_idx < 0) {
+ skip_mode_allowed = 0;
+ } else if (backward_idx >= 0) {
+ skip_mode_allowed = 1;
+ // Frames for skip mode are forward_idx and backward_idx.
+ } else {
+ int second_forward_idx;
+ int second_forward_hint;
+
+ second_forward_idx = -1;
+ for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
+ ref_hint = priv->ref[i].order_hint;
+ if (cbs_av1_get_relative_dist(seq, ref_hint,
+ forward_hint) < 0) {
+ if (second_forward_idx < 0 ||
+ cbs_av1_get_relative_dist(seq, ref_hint,
+ second_forward_hint) > 0) {
+ second_forward_idx = i;
+ second_forward_hint = ref_hint;
+ }
+ }
+ }
+
+ if (second_forward_idx < 0) {
+ skip_mode_allowed = 0;
+ } else {
+ skip_mode_allowed = 1;
+ // Frames for skip mode are forward_idx and second_forward_idx.
+ }
+ }
+ }
+
+ if (skip_mode_allowed)
+ flag(skip_mode_present);
+ else
+ infer(skip_mode_present, 0);
+
+ return 0;
+}
+
+static int FUNC(global_motion_param)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current,
+ int type, int ref, int idx)
+{
+ uint32_t abs_bits, prec_bits, num_syms;
+ int err;
+
+ if (idx < 2) {
+ if (type == AV1_WARP_MODEL_TRANSLATION) {
+ abs_bits = AV1_GM_ABS_TRANS_ONLY_BITS - !current->allow_high_precision_mv;
+ prec_bits = AV1_GM_TRANS_ONLY_PREC_BITS - !current->allow_high_precision_mv;
+ } else {
+ abs_bits = AV1_GM_ABS_TRANS_BITS;
+ prec_bits = AV1_GM_TRANS_PREC_BITS;
+ }
+ } else {
+ abs_bits = AV1_GM_ABS_ALPHA_BITS;
+ prec_bits = AV1_GM_ALPHA_PREC_BITS;
+ }
+
+ num_syms = 2 * (1 << abs_bits) + 1;
+ subexp(gm_params[ref][idx], num_syms, 2, ref, idx);
+
+ // Actual gm_params value is not reconstructed here.
+ (void)prec_bits;
+
+ return 0;
+}
+
+static int FUNC(global_motion_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ int ref, type;
+ int err;
+
+ if (current->frame_type == AV1_FRAME_KEY ||
+ current->frame_type == AV1_FRAME_INTRA_ONLY)
+ return 0;
+
+ for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) {
+ flags(is_global[ref], 1, ref);
+ if (current->is_global[ref]) {
+ flags(is_rot_zoom[ref], 1, ref);
+ if (current->is_rot_zoom[ref]) {
+ type = AV1_WARP_MODEL_ROTZOOM;
+ } else {
+ flags(is_translation[ref], 1, ref);
+ type = current->is_translation[ref] ? AV1_WARP_MODEL_TRANSLATION
+ : AV1_WARP_MODEL_AFFINE;
+ }
+ } else {
+ type = AV1_WARP_MODEL_IDENTITY;
+ }
+
+ if (type >= AV1_WARP_MODEL_ROTZOOM) {
+ CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 2));
+ CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 3));
+ if (type == AV1_WARP_MODEL_AFFINE) {
+ CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 4));
+ CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 5));
+ } else {
+ // gm_params[ref][4] = -gm_params[ref][3]
+ // gm_params[ref][5] = gm_params[ref][2]
+ }
+ }
+ if (type >= AV1_WARP_MODEL_TRANSLATION) {
+ CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 0));
+ CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 1));
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(film_grain_params)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq = priv->sequence_header;
+ int num_pos_luma, num_pos_chroma;
+ int i, err;
+
+ if (!seq->film_grain_params_present ||
+ (!current->show_frame && !current->showable_frame))
+ return 0;
+
+ flag(apply_grain);
+
+ if (!current->apply_grain)
+ return 0;
+
+ fb(16, grain_seed);
+
+ if (current->frame_type == AV1_FRAME_INTER)
+ flag(update_grain);
+ else
+ infer(update_grain, 1);
+
+ if (!current->update_grain) {
+ fb(3, film_grain_params_ref_idx);
+ return 0;
+ }
+
+ fb(4, num_y_points);
+ for (i = 0; i < current->num_y_points; i++) {
+ fbs(8, point_y_value[i], 1, i);
+ fbs(8, point_y_scaling[i], 1, i);
+ }
+
+ if (seq->color_config.mono_chrome)
+ infer(chroma_scaling_from_luma, 0);
+ else
+ flag(chroma_scaling_from_luma);
+
+ if (seq->color_config.mono_chrome ||
+ current->chroma_scaling_from_luma ||
+ (seq->color_config.subsampling_x == 1 &&
+ seq->color_config.subsampling_y == 1 &&
+ current->num_y_points == 0)) {
+ infer(num_cb_points, 0);
+ infer(num_cr_points, 0);
+ } else {
+ fb(4, num_cb_points);
+ for (i = 0; i < current->num_cb_points; i++) {
+ fbs(8, point_cb_value[i], 1, i);
+ fbs(8, point_cb_scaling[i], 1, i);
+ }
+ fb(4, num_cr_points);
+ for (i = 0; i < current->num_cr_points; i++) {
+ fbs(8, point_cr_value[i], 1, i);
+ fbs(8, point_cr_scaling[i], 1, i);
+ }
+ }
+
+ fb(2, grain_scaling_minus_8);
+ fb(2, ar_coeff_lag);
+ num_pos_luma = 2 * current->ar_coeff_lag * (current->ar_coeff_lag + 1);
+ if (current->num_y_points) {
+ num_pos_chroma = num_pos_luma + 1;
+ for (i = 0; i < num_pos_luma; i++)
+ fbs(8, ar_coeffs_y_plus_128[i], 1, i);
+ } else {
+ num_pos_chroma = num_pos_luma;
+ }
+ if (current->chroma_scaling_from_luma || current->num_cb_points) {
+ for (i = 0; i < num_pos_chroma; i++)
+ fbs(8, ar_coeffs_cb_plus_128[i], 1, i);
+ }
+ if (current->chroma_scaling_from_luma || current->num_cr_points) {
+ for (i = 0; i < num_pos_chroma; i++)
+ fbs(8, ar_coeffs_cr_plus_128[i], 1, i);
+ }
+ fb(2, ar_coeff_shift_minus_6);
+ fb(2, grain_scale_shift);
+ if (current->num_cb_points) {
+ fb(8, cb_mult);
+ fb(8, cb_luma_mult);
+ fb(9, cb_offset);
+ }
+ if (current->num_cr_points) {
+ fb(8, cr_mult);
+ fb(8, cr_luma_mult);
+ fb(9, cr_offset);
+ }
+
+ flag(overlap_flag);
+ flag(clip_to_restricted_range);
+
+ return 0;
+}
+
+static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ const AV1RawSequenceHeader *seq;
+ int id_len, diff_len, all_frames, frame_is_intra, order_hint_bits;
+ int i, err;
+
+ if (!priv->sequence_header) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
+ "unable to decode frame header.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ seq = priv->sequence_header;
+
+ id_len = seq->additional_frame_id_length_minus_1 +
+ seq->delta_frame_id_length_minus_2 + 3;
+ all_frames = (1 << AV1_NUM_REF_FRAMES) - 1;
+
+ if (seq->reduced_still_picture_header) {
+ infer(show_existing_frame, 0);
+ infer(frame_type, AV1_FRAME_KEY);
+ infer(show_frame, 1);
+ infer(showable_frame, 0);
+ frame_is_intra = 1;
+
+ } else {
+ flag(show_existing_frame);
+
+ if (current->show_existing_frame) {
+ AV1ReferenceFrameState *frame;
+
+ fb(3, frame_to_show_map_idx);
+ frame = &priv->ref[current->frame_to_show_map_idx];
+
+ if (seq->decoder_model_info_present_flag &&
+ !seq->timing_info.equal_picture_interval) {
+ fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
+ frame_presentation_time);
+ }
+
+ if (seq->frame_id_numbers_present_flag)
+ fb(id_len, display_frame_id);
+
+ if (frame->frame_type == AV1_FRAME_KEY)
+ infer(refresh_frame_flags, all_frames);
+ else
+ infer(refresh_frame_flags, 0);
+
+ return 0;
+ }
+
+ fb(2, frame_type);
+ frame_is_intra = (current->frame_type == AV1_FRAME_INTRA_ONLY ||
+ current->frame_type == AV1_FRAME_KEY);
+
+ flag(show_frame);
+ if (current->show_frame &&
+ seq->decoder_model_info_present_flag &&
+ !seq->timing_info.equal_picture_interval) {
+ fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
+ frame_presentation_time);
+ }
+ if (current->show_frame)
+ infer(showable_frame, current->frame_type != AV1_FRAME_KEY);
+ else
+ flag(showable_frame);
+
+ if (current->frame_type == AV1_FRAME_SWITCH ||
+ (current->frame_type == AV1_FRAME_KEY && current->show_frame))
+ infer(error_resilient_mode, 1);
+ else
+ flag(error_resilient_mode);
+ }
+
+ if (current->frame_type == AV1_FRAME_KEY && current->show_frame) {
+ for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
+ priv->ref[i].valid = 0;
+ priv->ref[i].order_hint = 0;
+ }
+ }
+
+ flag(disable_cdf_update);
+
+ if (seq->seq_force_screen_content_tools ==
+ AV1_SELECT_SCREEN_CONTENT_TOOLS) {
+ flag(allow_screen_content_tools);
+ } else {
+ infer(allow_screen_content_tools,
+ seq->seq_force_screen_content_tools);
+ }
+ if (current->allow_screen_content_tools) {
+ if (seq->seq_force_integer_mv == AV1_SELECT_INTEGER_MV)
+ flag(force_integer_mv);
+ else
+ infer(force_integer_mv, seq->seq_force_integer_mv);
+ } else {
+ infer(force_integer_mv, 0);
+ }
+
+ if (seq->frame_id_numbers_present_flag) {
+ fb(id_len, current_frame_id);
+
+ diff_len = seq->delta_frame_id_length_minus_2 + 2;
+ for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
+ if (current->current_frame_id > (1 << diff_len)) {
+ if (priv->ref[i].frame_id > current->current_frame_id ||
+ priv->ref[i].frame_id < (current->current_frame_id -
+ (1 << diff_len)))
+ priv->ref[i].valid = 0;
+ } else {
+ if (priv->ref[i].frame_id > current->current_frame_id &&
+ priv->ref[i].frame_id < ((1 << id_len) +
+ current->current_frame_id -
+ (1 << diff_len)))
+ priv->ref[i].valid = 0;
+ }
+ }
+ } else {
+ infer(current_frame_id, 0);
+ }
+
+ if (current->frame_type == AV1_FRAME_SWITCH)
+ infer(frame_size_override_flag, 1);
+ else if(seq->reduced_still_picture_header)
+ infer(frame_size_override_flag, 0);
+ else
+ flag(frame_size_override_flag);
+
+ order_hint_bits =
+ seq->enable_order_hint ? seq->order_hint_bits_minus_1 + 1 : 0;
+ if (order_hint_bits > 0)
+ fb(order_hint_bits, order_hint);
+ else
+ infer(order_hint, 0);
+
+ if (frame_is_intra || current->error_resilient_mode)
+ infer(primary_ref_frame, AV1_PRIMARY_REF_NONE);
+ else
+ fb(3, primary_ref_frame);
+
+ if (seq->decoder_model_info_present_flag) {
+ flag(buffer_removal_time_present_flag);
+ if (current->buffer_removal_time_present_flag) {
+ for (i = 0; i <= seq->operating_points_cnt_minus_1; i++) {
+ if (seq->decoder_model_present_for_this_op[i]) {
+ int op_pt_idc = seq->operating_point_idc[i];
+ int in_temporal_layer = (op_pt_idc >> priv->temporal_id ) & 1;
+ int in_spatial_layer = (op_pt_idc >> (priv->spatial_id + 8)) & 1;
+ if (seq->operating_point_idc[i] == 0 ||
+ in_temporal_layer || in_spatial_layer) {
+ fbs(seq->decoder_model_info.buffer_removal_time_length_minus_1 + 1,
+ buffer_removal_time[i], 1, i);
+ }
+ }
+ }
+ }
+ }
+
+ if (current->frame_type == AV1_FRAME_SWITCH ||
+ (current->frame_type == AV1_FRAME_KEY && current->show_frame))
+ infer(refresh_frame_flags, all_frames);
+ else
+ fb(8, refresh_frame_flags);
+
+ if (!frame_is_intra || current->refresh_frame_flags != all_frames) {
+ if (current->error_resilient_mode && seq->enable_order_hint) {
+ for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
+ fbs(order_hint_bits, ref_order_hint[i], 1, i);
+ if (current->ref_order_hint[i] != priv->ref[i].order_hint)
+ priv->ref[i].valid = 0;
+ }
+ }
+ }
+
+ if (current->frame_type == AV1_FRAME_KEY ||
+ current->frame_type == AV1_FRAME_INTRA_ONLY) {
+ CHECK(FUNC(frame_size)(ctx, rw, current));
+ CHECK(FUNC(render_size)(ctx, rw, current));
+
+ if (current->allow_screen_content_tools &&
+ priv->upscaled_width == priv->frame_width)
+ flag(allow_intrabc);
+ else
+ infer(allow_intrabc, 0);
+
+ } else {
+ if (!seq->enable_order_hint) {
+ infer(frame_refs_short_signaling, 0);
+ } else {
+ flag(frame_refs_short_signaling);
+ if (current->frame_refs_short_signaling) {
+ fb(3, last_frame_idx);
+ fb(3, golden_frame_idx);
+
+ for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
+ if (i == 0)
+ infer(ref_frame_idx[i], current->last_frame_idx);
+ else if (i == AV1_REF_FRAME_GOLDEN -
+ AV1_REF_FRAME_LAST)
+ infer(ref_frame_idx[i], current->golden_frame_idx);
+ else
+ infer(ref_frame_idx[i], -1);
+ }
+ }
+ }
+
+ for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
+ if (!current->frame_refs_short_signaling)
+ fbs(3, ref_frame_idx[i], 1, i);
+ if (seq->frame_id_numbers_present_flag) {
+ fb(seq->delta_frame_id_length_minus_2 + 2,
+ delta_frame_id_minus1);
+ }
+ }
+
+ if (current->frame_size_override_flag &&
+ !current->error_resilient_mode) {
+ CHECK(FUNC(frame_size_with_refs)(ctx, rw, current));
+ } else {
+ CHECK(FUNC(frame_size)(ctx, rw, current));
+ CHECK(FUNC(render_size)(ctx, rw, current));
+ }
+
+ if (current->force_integer_mv)
+ infer(allow_high_precision_mv, 0);
+ else
+ flag(allow_high_precision_mv);
+
+ CHECK(FUNC(interpolation_filter)(ctx, rw, current));
+
+ flag(is_motion_mode_switchable);
+
+ if (current->error_resilient_mode ||
+ !seq->enable_ref_frame_mvs)
+ infer(use_ref_frame_mvs, 0);
+ else
+ flag(use_ref_frame_mvs);
+
+ infer(allow_intrabc, 0);
+ }
+
+ if (!frame_is_intra) {
+ // Derive reference frame sign biases.
+ }
+
+ if (seq->reduced_still_picture_header || current->disable_cdf_update)
+ infer(disable_frame_end_update_cdf, 1);
+ else
+ flag(disable_frame_end_update_cdf);
+
+ if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
+ // Init non-coeff CDFs.
+ // Setup past independence.
+ } else {
+ // Load CDF tables from previous frame.
+ // Load params from previous frame.
+ }
+
+ if (current->use_ref_frame_mvs) {
+ // Perform motion field estimation process.
+ }
+
+ CHECK(FUNC(tile_info)(ctx, rw, current));
+
+ CHECK(FUNC(quantization_params)(ctx, rw, current));
+
+ CHECK(FUNC(segmentation_params)(ctx, rw, current));
+
+ CHECK(FUNC(delta_q_params)(ctx, rw, current));
+
+ CHECK(FUNC(delta_lf_params)(ctx, rw, current));
+
+ // Init coeff CDFs / load previous segments.
+
+ priv->coded_lossless = 1;
+ for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
+ int qindex;
+ if (current->feature_enabled[i][AV1_SEG_LVL_ALT_Q]) {
+ qindex = (current->base_q_idx +
+ current->feature_value[i][AV1_SEG_LVL_ALT_Q]);
+ } else {
+ qindex = current->base_q_idx;
+ }
+ qindex = av_clip_uintp2(qindex, 8);
+
+ if (qindex || current->delta_q_y_dc ||
+ current->delta_q_u_ac || current->delta_q_u_dc ||
+ current->delta_q_v_ac || current->delta_q_v_dc) {
+ priv->coded_lossless = 0;
+ }
+ }
+ priv->all_lossless = priv->coded_lossless &&
+ priv->frame_width == priv->upscaled_width;
+
+ CHECK(FUNC(loop_filter_params)(ctx, rw, current));
+
+ CHECK(FUNC(cdef_params)(ctx, rw, current));
+
+ CHECK(FUNC(lr_params)(ctx, rw, current));
+
+ CHECK(FUNC(read_tx_mode)(ctx, rw, current));
+
+ CHECK(FUNC(frame_reference_mode)(ctx, rw, current));
+
+ CHECK(FUNC(skip_mode_params)(ctx, rw, current));
+
+ if (frame_is_intra || current->error_resilient_mode ||
+ !seq->enable_warped_motion)
+ infer(allow_warped_motion, 0);
+ else
+ flag(allow_warped_motion);
+
+ flag(reduced_tx_set);
+
+ CHECK(FUNC(global_motion_params)(ctx, rw, current));
+
+ CHECK(FUNC(film_grain_params)(ctx, rw, current));
+
+ for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
+ if (current->refresh_frame_flags & (1 << i)) {
+ priv->ref[i] = (AV1ReferenceFrameState) {
+ .valid = 1,
+ .frame_id = current->current_frame_id,
+ .upscaled_width = priv->upscaled_width,
+ .frame_width = priv->frame_width,
+ .frame_height = priv->frame_height,
+ .render_width = priv->render_width,
+ .render_height = priv->render_height,
+ .frame_type = current->frame_type,
+ .subsampling_x = seq->color_config.subsampling_x,
+ .subsampling_y = seq->color_config.subsampling_y,
+ .bit_depth = priv->bit_depth,
+ .order_hint = current->order_hint,
+ };
+ }
+ }
+
+ av_log(ctx->log_ctx, AV_LOG_DEBUG, "Frame %d: size %dx%d "
+ "upscaled %d render %dx%d subsample %dx%d "
+ "bitdepth %d tiles %dx%d.\n", current->order_hint,
+ priv->frame_width, priv->frame_height, priv->upscaled_width,
+ priv->render_width, priv->render_height,
+ seq->color_config.subsampling_x + 1,
+ seq->color_config.subsampling_y + 1, priv->bit_depth,
+ priv->tile_rows, priv->tile_cols);
+
+ return 0;
+}
+
+static int FUNC(frame_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrameHeader *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int err;
+
+ HEADER("Frame Header");
+
+ if (priv->seen_frame_header) {
+ // Nothing to do.
+ } else {
+ priv->seen_frame_header = 1;
+
+ CHECK(FUNC(uncompressed_header)(ctx, rw, current));
+
+ if (current->show_existing_frame) {
+ priv->seen_frame_header = 0;
+ } else {
+ priv->seen_frame_header = 1;
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(tile_group_obu)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawTileGroup *current)
+{
+ CodedBitstreamAV1Context *priv = ctx->priv_data;
+ int num_tiles, tile_bits;
+ int err;
+
+ HEADER("Tile Group");
+
+ num_tiles = priv->tile_cols * priv->tile_rows;
+ if (num_tiles > 1)
+ flag(tile_start_and_end_present_flag);
+ else
+ infer(tile_start_and_end_present_flag, 0);
+
+ if (num_tiles == 1 || !current->tile_start_and_end_present_flag) {
+ infer(tg_start, 0);
+ infer(tg_end, num_tiles - 1);
+ } else {
+ tile_bits = cbs_av1_tile_log2(1, priv->tile_cols) +
+ cbs_av1_tile_log2(1, priv->tile_rows);
+ fb(tile_bits, tg_start);
+ fb(tile_bits, tg_end);
+ }
+
+ CHECK(FUNC(byte_alignment)(ctx, rw));
+
+ // Reset header for next frame.
+ if (current->tg_end == num_tiles - 1)
+ priv->seen_frame_header = 0;
+
+ // Tile data follows.
+
+ return 0;
+}
+
+static int FUNC(frame_obu)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawFrame *current)
+{
+ int err;
+
+ CHECK(FUNC(frame_header_obu)(ctx, rw, &current->header));
+
+ CHECK(FUNC(byte_alignment)(ctx, rw));
+
+ CHECK(FUNC(tile_group_obu)(ctx, rw, &current->tile_group));
+
+ return 0;
+}
+
+static int FUNC(tile_list_obu)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawTileList *current)
+{
+ int err;
+
+ fb(8, output_frame_width_in_tiles_minus_1);
+ fb(8, output_frame_height_in_tiles_minus_1);
+
+ fb(16, tile_count_minus_1);
+
+ // Tile data follows.
+
+ return 0;
+}
+
+static int FUNC(metadata_hdr_cll)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawMetadataHDRCLL *current)
+{
+ int err;
+
+ fb(16, max_cll);
+ fb(16, max_fall);
+
+ return 0;
+}
+
+static int FUNC(metadata_hdr_mdcv)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawMetadataHDRMDCV *current)
+{
+ int err, i;
+
+ for (i = 0; i < 3; i++) {
+ fcs(16, primary_chromaticity_x[i], 0, 50000, 1, i);
+ fcs(16, primary_chromaticity_y[i], 0, 50000, 1, i);
+ }
+
+ fc(16, white_point_chromaticity_x, 0, 50000);
+ fc(16, white_point_chromaticity_y, 0, 50000);
+
+ fc(32, luminance_max, 1, MAX_UINT_BITS(32));
+ fc(32, luminance_min, 0, current->luminance_max >> 6);
+
+ return 0;
+}
+
+static int FUNC(metadata_scalability)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawMetadataScalability *current)
+{
+ // TODO: scalability metadata.
+
+ return AVERROR_PATCHWELCOME;
+}
+
+static int FUNC(metadata_itut_t35)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawMetadataITUTT35 *current)
+{
+ int err;
+ size_t i;
+
+ fb(8, itu_t_t35_country_code);
+ if (current->itu_t_t35_country_code == 0xff)
+ fb(8, itu_t_t35_country_code_extension_byte);
+
+#ifdef READ
+ // The payload runs up to the start of the trailing bits, but there might
+ // be arbitrarily many trailing zeroes so we need to read through twice.
+ {
+ GetBitContext tmp = *rw;
+ current->payload_size = 0;
+ for (i = 0; get_bits_left(rw) >= 8; i++) {
+ if (get_bits(rw, 8))
+ current->payload_size = i;
+ }
+ *rw = tmp;
+ }
+
+ current->payload_ref = av_buffer_alloc(current->payload_size);
+ if (!current->payload_ref)
+ return AVERROR(ENOMEM);
+ current->payload = current->payload_ref->data;
+#endif
+
+ for (i = 0; i < current->payload_size; i++)
+ xf(8, itu_t_t35_payload_bytes[i], current->payload[i],
+ 0x00, 0xff, 1, i);
+
+ return 0;
+}
+
+static int FUNC(metadata_timecode)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawMetadataTimecode *current)
+{
+ int err;
+
+ fb(5, counting_type);
+ flag(full_timestamp_flag);
+ flag(discontinuity_flag);
+ flag(cnt_dropped_flag);
+ fb(9, n_frames);
+
+ if (current->full_timestamp_flag) {
+ fb(6, seconds_value);
+ fb(6, minutes_value);
+ fb(5, hours_value);
+ } else {
+ flag(seconds_flag);
+ if (current->seconds_flag) {
+ fb(6, seconds_value);
+ flag(minutes_flag);
+ if (current->minutes_flag) {
+ fb(6, minutes_value);
+ flag(hours_flag);
+ if (current->hours_flag)
+ fb(5, hours_value);
+ }
+ }
+ }
+
+ fb(5, time_offset_length);
+ if (current->time_offset_length > 0)
+ fb(current->time_offset_length, time_offset_value);
+
+ return 0;
+}
+
+static int FUNC(metadata_obu)(CodedBitstreamContext *ctx, RWContext *rw,
+ AV1RawMetadata *current)
+{
+ int err;
+
+ leb128(metadata_type);
+
+ switch (current->metadata_type) {
+ case AV1_METADATA_TYPE_HDR_CLL:
+ CHECK(FUNC(metadata_hdr_cll)(ctx, rw, &current->metadata.hdr_cll));
+ break;
+ case AV1_METADATA_TYPE_HDR_MDCV:
+ CHECK(FUNC(metadata_hdr_mdcv)(ctx, rw, &current->metadata.hdr_mdcv));
+ break;
+ case AV1_METADATA_TYPE_SCALABILITY:
+ CHECK(FUNC(metadata_scalability)(ctx, rw, &current->metadata.scalability));
+ break;
+ case AV1_METADATA_TYPE_ITUT_T35:
+ CHECK(FUNC(metadata_itut_t35)(ctx, rw, &current->metadata.itut_t35));
+ break;
+ case AV1_METADATA_TYPE_TIMECODE:
+ CHECK(FUNC(metadata_timecode)(ctx, rw, &current->metadata.timecode));
+ break;
+ default:
+ // Unknown metadata type.
+ return AVERROR_PATCHWELCOME;
+ }
+
+ return 0;
+}
diff --git a/libavcodec/cbs_internal.h b/libavcodec/cbs_internal.h
index e0e912e28e..53f2e5d187 100644
--- a/libavcodec/cbs_internal.h
+++ b/libavcodec/cbs_internal.h
@@ -86,6 +86,7 @@ int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc,
#define MAX_UINT_BITS(length) ((UINT64_C(1) << (length)) - 1)
+extern const CodedBitstreamType ff_cbs_type_av1;
extern const CodedBitstreamType ff_cbs_type_h264;
extern const CodedBitstreamType ff_cbs_type_h265;
extern const CodedBitstreamType ff_cbs_type_jpeg;