lavc: add Intel libmfx-based HEVC encoder

1 files changed, 272 insertions, 0 deletions

diff --git a/libavcodec/qsvenc_hevc.c b/libavcodec/qsvenc_hevc.c
new file mode 100644
index 0000000000..03007f1814
--- /dev/null
+++ b/libavcodec/qsvenc_hevc.c
@@ -0,0 +1,272 @@
+/*
+ * Intel MediaSDK QSV based HEVC encoder
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <mfx/mfxvideo.h>
+
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "bytestream.h"
+#include "get_bits.h"
+#include "hevc.h"
+#include "internal.h"
+#include "qsv.h"
+#include "qsv_internal.h"
+#include "qsvenc.h"
+
+enum {
+    LOAD_PLUGIN_NONE,
+    LOAD_PLUGIN_HEVC_SW,
+    LOAD_PLUGIN_HEVC_HW,
+} LoadPlugin;
+
+typedef struct QSVHEVCEncContext {
+    AVClass *class;
+    QSVEncContext qsv;
+    int load_plugin;
+} QSVHEVCEncContext;
+
+static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
+{
+    GetByteContext gbc;
+    PutByteContext pbc;
+
+    GetBitContext gb;
+    HEVCNAL sps_nal = { NULL };
+    HEVCSPS sps = { 0 };
+    HEVCVPS vps = { 0 };
+    uint8_t vps_buf[128], vps_rbsp_buf[128];
+    uint8_t *new_extradata;
+    unsigned int sps_id;
+    int ret, i, type, vps_size;
+
+    if (!avctx->extradata_size) {
+        av_log(avctx, AV_LOG_ERROR, "No extradata returned from libmfx\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    /* parse the SPS */
+    ret = ff_hevc_extract_rbsp(avctx->extradata + 4, avctx->extradata_size - 4, &sps_nal);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error unescaping the SPS buffer\n");
+        return ret;
+    }
+
+    ret = init_get_bits8(&gb, sps_nal.data, sps_nal.size);
+    if (ret < 0) {
+        av_freep(&sps_nal.rbsp_buffer);
+        return ret;
+    }
+
+    get_bits(&gb, 1);
+    type = get_bits(&gb, 6);
+    if (type != NAL_SPS) {
+        av_log(avctx, AV_LOG_ERROR, "Unexpected NAL type in the extradata: %d\n",
+               type);
+        av_freep(&sps_nal.rbsp_buffer);
+        return AVERROR_INVALIDDATA;
+    }
+    get_bits(&gb, 9);
+
+    ret = ff_hevc_parse_sps(&sps, &gb, &sps_id, 0, NULL, avctx);
+    av_freep(&sps_nal.rbsp_buffer);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error parsing the SPS\n");
+        return ret;
+    }
+
+    /* generate the VPS */
+    vps.vps_max_layers     = 1;
+    vps.vps_max_sub_layers = sps.max_sub_layers;
+    memcpy(&vps.ptl, &sps.ptl, sizeof(vps.ptl));
+    vps.vps_sub_layer_ordering_info_present_flag = 1;
+    for (i = 0; i < MAX_SUB_LAYERS; i++) {
+        vps.vps_max_dec_pic_buffering[i] = sps.temporal_layer[i].max_dec_pic_buffering;
+        vps.vps_num_reorder_pics[i]      = sps.temporal_layer[i].num_reorder_pics;
+        vps.vps_max_latency_increase[i]  = sps.temporal_layer[i].max_latency_increase;
+    }
+
+    vps.vps_num_layer_sets                  = 1;
+    vps.vps_timing_info_present_flag        = sps.vui.vui_timing_info_present_flag;
+    vps.vps_num_units_in_tick               = sps.vui.vui_num_units_in_tick;
+    vps.vps_time_scale                      = sps.vui.vui_time_scale;
+    vps.vps_poc_proportional_to_timing_flag = sps.vui.vui_poc_proportional_to_timing_flag;
+    vps.vps_num_ticks_poc_diff_one          = sps.vui.vui_num_ticks_poc_diff_one_minus1 + 1;
+
+    /* generate the encoded RBSP form of the VPS */
+    ret = ff_hevc_encode_nal_vps(&vps, sps.vps_id, vps_rbsp_buf, sizeof(vps_rbsp_buf));
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error writing the VPS\n");
+        return ret;
+    }
+
+    /* escape and add the startcode */
+    bytestream2_init(&gbc, vps_rbsp_buf, ret);
+    bytestream2_init_writer(&pbc, vps_buf, sizeof(vps_buf));
+
+    bytestream2_put_be32(&pbc, 1);              // startcode
+    bytestream2_put_byte(&pbc, NAL_VPS << 1);   // NAL
+    bytestream2_put_byte(&pbc, 1);              // header
+
+    while (bytestream2_get_bytes_left(&gbc)) {
+        uint32_t b = bytestream2_peek_be24(&gbc);
+        if (b <= 3) {
+            bytestream2_put_be24(&pbc, 3);
+            bytestream2_skip(&gbc, 2);
+        } else
+            bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
+    }
+
+    vps_size = bytestream2_tell_p(&pbc);
+    new_extradata = av_mallocz(vps_size + avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!new_extradata)
+        return AVERROR(ENOMEM);
+    memcpy(new_extradata, vps_buf, vps_size);
+    memcpy(new_extradata + vps_size, avctx->extradata, avctx->extradata_size);
+
+    av_freep(&avctx->extradata);
+    avctx->extradata       = new_extradata;
+    avctx->extradata_size += vps_size;
+
+    return 0;
+}
+
+static av_cold int qsv_enc_init(AVCodecContext *avctx)
+{
+    QSVHEVCEncContext *q = avctx->priv_data;
+    int ret;
+
+    if (q->load_plugin != LOAD_PLUGIN_NONE) {
+        static const char *uid_hevcenc_sw = "2fca99749fdb49aeb121a5b63ef568f7";
+        static const char *uid_hevcenc_hw = "e5400a06c74d41f5b12d430bbaa23d0b";
+
+        if (q->qsv.load_plugins[0]) {
+            av_log(avctx, AV_LOG_WARNING,
+                   "load_plugins is not empty, but load_plugin is not set to 'none'."
+                   "The load_plugin value will be ignored.\n");
+        } else {
+            av_freep(&q->qsv.load_plugins);
+
+            if (q->load_plugin == LOAD_PLUGIN_HEVC_SW)
+                q->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
+            else
+                q->qsv.load_plugins = av_strdup(uid_hevcenc_hw);
+
+            if (!q->qsv.load_plugins)
+                return AVERROR(ENOMEM);
+        }
+    }
+
+    ret = ff_qsv_enc_init(avctx, &q->qsv);
+    if (ret < 0)
+        return ret;
+
+    ret = generate_fake_vps(&q->qsv, avctx);
+    if (ret < 0) {
+        ff_qsv_enc_close(avctx, &q->qsv);
+        return ret;
+    }
+
+    return 0;
+}
+
+static int qsv_enc_frame(AVCodecContext *avctx, AVPacket *pkt,
+                         const AVFrame *frame, int *got_packet)
+{
+    QSVHEVCEncContext *q = avctx->priv_data;
+
+    return ff_qsv_encode(avctx, &q->qsv, pkt, frame, got_packet);
+}
+
+static av_cold int qsv_enc_close(AVCodecContext *avctx)
+{
+    QSVHEVCEncContext *q = avctx->priv_data;
+
+    return ff_qsv_enc_close(avctx, &q->qsv);
+}
+
+#define OFFSET(x) offsetof(QSVHEVCEncContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "async_depth", "Maximum processing parallelism", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VE },
+    { "avbr_accuracy",    "Accuracy of the AVBR ratecontrol",    OFFSET(qsv.avbr_accuracy),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
+    { "avbr_convergence", "Convergence of the AVBR ratecontrol", OFFSET(qsv.avbr_convergence), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
+
+    { "load_plugin", "A user plugin to load in an internal session", OFFSET(load_plugin), AV_OPT_TYPE_INT, { .i64 = LOAD_PLUGIN_HEVC_SW }, LOAD_PLUGIN_NONE, LOAD_PLUGIN_HEVC_HW, VE, "load_plugin" },
+    { "none",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE },    0, 0, VE, "load_plugin" },
+    { "hevc_sw",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VE, "load_plugin" },
+    { "hevc_hw",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_HW }, 0, 0, VE, "load_plugin" },
+
+    { "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
+        OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VE },
+
+    { "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 = MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
+    { "unknown", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_UNKNOWN      }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "main",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN    }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "main10",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN10  }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "mainsp",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAINSP  }, INT_MIN, INT_MAX,     VE, "profile" },
+
+    { "preset", NULL, OFFSET(qsv.preset), AV_OPT_TYPE_INT, { .i64 = MFX_TARGETUSAGE_BALANCED }, 0, 7,   VE, "preset" },
+    { "fast",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TARGETUSAGE_BEST_SPEED  },   INT_MIN, INT_MAX, VE, "preset" },
+    { "medium", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TARGETUSAGE_BALANCED  },     INT_MIN, INT_MAX, VE, "preset" },
+    { "slow",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TARGETUSAGE_BEST_QUALITY  }, INT_MIN, INT_MAX, VE, "preset" },
+
+    { NULL },
+};
+
+static const AVClass class = {
+    .class_name = "hevc_qsv encoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault qsv_enc_defaults[] = {
+    { "b",         "1M"    },
+    { "refs",      "0"     },
+    // same as the x264 default
+    { "g",         "250"   },
+    { "bf",        "3"     },
+
+    { "flags",     "+cgop" },
+    { NULL },
+};
+
+AVCodec ff_hevc_qsv_encoder = {
+    .name           = "hevc_qsv",
+    .long_name      = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
+    .priv_data_size = sizeof(QSVHEVCEncContext),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_HEVC,
+    .init           = qsv_enc_init,
+    .encode2        = qsv_enc_frame,
+    .close          = qsv_enc_close,
+    .capabilities   = CODEC_CAP_DELAY,
+    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
+                                                    AV_PIX_FMT_QSV,
+                                                    AV_PIX_FMT_NONE },
+    .priv_class     = &class,
+    .defaults       = qsv_enc_defaults,
+};