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-rw-r--r--libavcodec/vp9_parser.c127
1 files changed, 10 insertions, 117 deletions
diff --git a/libavcodec/vp9_parser.c b/libavcodec/vp9_parser.c
index 9900e7ab1f..9531f34a32 100644
--- a/libavcodec/vp9_parser.c
+++ b/libavcodec/vp9_parser.c
@@ -25,21 +25,19 @@
#include "libavcodec/get_bits.h"
#include "parser.h"
-typedef struct VP9ParseContext {
- int n_frames; // 1-8
- int size[8];
- int marker_size;
- int64_t pts;
-} VP9ParseContext;
-
-static int parse_frame(AVCodecParserContext *ctx, const uint8_t *buf, int size)
+static int parse(AVCodecParserContext *ctx,
+ AVCodecContext *avctx,
+ const uint8_t **out_data, int *out_size,
+ const uint8_t *data, int size)
{
- VP9ParseContext *s = ctx->priv_data;
GetBitContext gb;
- int res, profile, keyframe, invisible;
+ int res, profile, keyframe;
- if ((res = init_get_bits8(&gb, buf, size)) < 0)
- return res;
+ *out_data = data;
+ *out_size = size;
+
+ if ((res = init_get_bits8(&gb, data, size)) < 0)
+ return size; // parsers can't return errors
get_bits(&gb, 2); // frame marker
profile = get_bits1(&gb);
profile |= get_bits1(&gb) << 1;
@@ -47,10 +45,8 @@ static int parse_frame(AVCodecParserContext *ctx, const uint8_t *buf, int size)
if (get_bits1(&gb)) {
keyframe = 0;
- invisible = 0;
} else {
keyframe = !get_bits1(&gb);
- invisible = !get_bits1(&gb);
}
if (!keyframe) {
@@ -61,113 +57,10 @@ static int parse_frame(AVCodecParserContext *ctx, const uint8_t *buf, int size)
ctx->key_frame = 1;
}
- if (!invisible) {
- if (ctx->pts == AV_NOPTS_VALUE)
- ctx->pts = s->pts;
- s->pts = AV_NOPTS_VALUE;
- } else if (ctx->pts != AV_NOPTS_VALUE) {
- s->pts = ctx->pts;
- ctx->pts = AV_NOPTS_VALUE;
- }
-
- return 0;
-}
-
-static int parse(AVCodecParserContext *ctx,
- AVCodecContext *avctx,
- const uint8_t **out_data, int *out_size,
- const uint8_t *data, int size)
-{
- VP9ParseContext *s = ctx->priv_data;
- int full_size = size;
- int marker;
-
- if (size <= 0) {
- *out_size = 0;
- *out_data = data;
-
- return 0;
- }
-
- if (s->n_frames > 0) {
- int i;
- int size_sum = 0;
-
- for (i = 0; i < s->n_frames ;i++)
- size_sum += s->size[i];
- size_sum += s->marker_size;
-
- if (size_sum != size) {
- av_log(avctx, AV_LOG_ERROR, "Inconsistent input frame sizes %d %d\n",
- size_sum, size);
- s->n_frames = 0;
- }
- }
-
- if (s->n_frames > 0) {
- *out_data = data;
- *out_size = s->size[--s->n_frames];
- parse_frame(ctx, *out_data, *out_size);
-
- return s->n_frames > 0 ? *out_size : size /* i.e. include idx tail */;
- }
-
- marker = data[size - 1];
- if ((marker & 0xe0) == 0xc0) {
- int nbytes = 1 + ((marker >> 3) & 0x3);
- int n_frames = 1 + (marker & 0x7), idx_sz = 2 + n_frames * nbytes;
-
- if (size >= idx_sz && data[size - idx_sz] == marker) {
- const uint8_t *idx = data + size + 1 - idx_sz;
- int first = 1;
-
- switch (nbytes) {
-#define case_n(a, rd) \
- case a: \
- while (n_frames--) { \
- unsigned sz = rd; \
- idx += a; \
- if (sz == 0 || sz > size) { \
- s->n_frames = 0; \
- *out_size = size; \
- *out_data = data; \
- av_log(avctx, AV_LOG_ERROR, \
- "Invalid superframe packet size: %u frame size: %d\n", \
- sz, size); \
- return full_size; \
- } \
- if (first) { \
- first = 0; \
- *out_data = data; \
- *out_size = sz; \
- s->n_frames = n_frames; \
- } else { \
- s->size[n_frames] = sz; \
- } \
- data += sz; \
- size -= sz; \
- } \
- s->marker_size = size; \
- parse_frame(ctx, *out_data, *out_size); \
- return s->n_frames > 0 ? *out_size : full_size
-
- case_n(1, *idx);
- case_n(2, AV_RL16(idx));
- case_n(3, AV_RL24(idx));
- case_n(4, AV_RL32(idx));
- }
- }
- }
-
- *out_data = data;
- *out_size = size;
- parse_frame(ctx, data, size);
-
return size;
}
AVCodecParser ff_vp9_parser = {
.codec_ids = { AV_CODEC_ID_VP9 },
- .priv_data_size = sizeof(VP9ParseContext),
.parser_parse = parse,
};