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lavc: add a codec flag for propagating opaque from frames to packets

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This is intended to be a more convenient replacement for
reordered_opaque.

Add support for it in the two encoders that offer
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE: libx264 and libx265. Other
encoders will be supported in future commits.
This commit is contained in:
Anton Khirnov 2022-07-12 11:25:09 +02:00
parent d0c8ca961d
commit 5c0348f3d6
7 changed files with 101 additions and 15 deletions
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3
doc/APIchanges
View File

@ -14,6 +14,9 @@ libavutil: 2021-04-27
API changes, most recent first:
2023-01-xx - xxxxxxxxxx - lavc 59.59.100 - avcodec.h
Add AV_CODEC_FLAG_COPY_OPAQUE.
2023-01-13 - xxxxxxxxxx - lavu 57.44.100 - ambient_viewing_environment.h frame.h
Adds a new structure for holding H.274 Ambient Viewing Environment metadata,
AVAmbientViewingEnvironment.

26
libavcodec/avcodec.h
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@ -241,6 +241,32 @@ typedef struct RcOverride{
* @ref AV_CODEC_CAP_ENCODER_RECON_FRAME capability.
*/
#define AV_CODEC_FLAG_RECON_FRAME (1 << 6)
/**
* Request the encoder to propagate each frame's AVFrame.opaque and
* AVFrame.opaque_ref values to its corresponding output AVPacket.
*
* May only be set on encoders that have the
* @ref AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability flag.
*
* @note
* While in typical cases one input frame produces exactly one output packet
* (perhaps after a delay), in general the mapping of frames to packets is
* M-to-N, so
* - Any number of input frames may be associated with any given output packet.
* This includes zero - e.g. some encoders may output packets that carry only
* metadata about the whole stream.
* - A given input frame may be associated with any number of output packets.
* Again this includes zero - e.g. some encoders may drop frames under certain
* conditions.
* .
* This implies that when using this flag, the caller must NOT assume that
* - a given input frame's opaques will necessarily appear on some output packet;
* - every output packet will have some non-NULL opaque value.
* .
* When an output packet contains multiple frames, the opaque values will be
* taken from the first of those.
*/
#define AV_CODEC_FLAG_COPY_OPAQUE (1 << 7)
/**
* Use internal 2pass ratecontrol in first pass mode.
*/

7
libavcodec/encode.c
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@ -636,6 +636,13 @@ int ff_encode_preinit(AVCodecContext *avctx)
return AVERROR(EINVAL);
}
if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE &&
!(avctx->codec->capabilities & AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE)) {
av_log(avctx, AV_LOG_ERROR, "The copy_opaque flag is set, but the "
"encoder does not support it.\n");
return AVERROR(EINVAL);
}
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO: ret = encode_preinit_video(avctx); break;
case AVMEDIA_TYPE_AUDIO: ret = encode_preinit_audio(avctx); break;

29
libavcodec/libx264.c
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@ -21,6 +21,7 @@
#include "config_components.h"
#include "libavutil/buffer.h"
#include "libavutil/eval.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
@ -51,6 +52,9 @@
typedef struct X264Opaque {
int64_t reordered_opaque;
int64_t wallclock;
void *frame_opaque;
AVBufferRef *frame_opaque_ref;
} X264Opaque;
typedef struct X264Context {
@ -133,6 +137,11 @@ static void X264_log(void *p, int level, const char *fmt, va_list args)
av_vlog(p, level_map[level], fmt, args);
}
static void opaque_uninit(X264Opaque *o)
{
av_buffer_unref(&o->frame_opaque_ref);
memset(o, 0, sizeof(*o));
}
static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,
const x264_nal_t *nals, int nnal)
@ -440,6 +449,15 @@ static int setup_frame(AVCodecContext *ctx, const AVFrame *frame,
pic->i_pts = frame->pts;
opaque_uninit(opaque);
if (ctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
opaque->frame_opaque = frame->opaque;
ret = av_buffer_replace(&opaque->frame_opaque_ref, frame->opaque_ref);
if (ret < 0)
goto fail;
}
opaque->reordered_opaque = frame->reordered_opaque;
opaque->wallclock = wallclock;
if (ctx->export_side_data & AV_CODEC_EXPORT_DATA_PRFT)
@ -594,6 +612,14 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
out_opaque < &x4->reordered_opaque[x4->nb_reordered_opaque]) {
ctx->reordered_opaque = out_opaque->reordered_opaque;
wallclock = out_opaque->wallclock;
if (ctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
pkt->opaque = out_opaque->frame_opaque;
pkt->opaque_ref = out_opaque->frame_opaque_ref;
out_opaque->frame_opaque_ref = NULL;
}
opaque_uninit(out_opaque);
} else {
// Unexpected opaque pointer on picture output
av_log(ctx, AV_LOG_ERROR, "Unexpected opaque pointer; "
@ -634,6 +660,9 @@ static av_cold int X264_close(AVCodecContext *avctx)
X264Context *x4 = avctx->priv_data;
av_freep(&x4->sei);
for (int i = 0; i < x4->nb_reordered_opaque; i++)
opaque_uninit(&x4->reordered_opaque[i]);
av_freep(&x4->reordered_opaque);
#if X264_BUILD >= 161

48
libavcodec/libx265.c
View File

@ -28,6 +28,7 @@
#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/buffer.h"
#include "libavutil/internal.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
@ -43,6 +44,9 @@
typedef struct ReorderedData {
int64_t reordered_opaque;
void *frame_opaque;
AVBufferRef *frame_opaque_ref;
int in_use;
} ReorderedData;
@ -121,7 +125,7 @@ static int rd_get(libx265Context *ctx)
static void rd_release(libx265Context *ctx, int idx)
{
av_assert0(idx >= 0 && idx < ctx->nb_rd);
av_buffer_unref(&ctx->rd[idx].frame_opaque_ref);
memset(&ctx->rd[idx], 0, sizeof(ctx->rd[idx]));
}
@ -132,6 +136,8 @@ static av_cold int libx265_encode_close(AVCodecContext *avctx)
ctx->api->param_free(ctx->params);
av_freep(&ctx->sei_data);
for (int i = 0; i < ctx->nb_rd; i++)
rd_release(ctx, i);
av_freep(&ctx->rd);
if (ctx->encoder)
@ -582,6 +588,9 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
sei->numPayloads = 0;
if (pic) {
ReorderedData *rd;
int rd_idx;
for (i = 0; i < 3; i++) {
x265pic.planes[i] = pic->data[i];
x265pic.stride[i] = pic->linesize[i];
@ -600,20 +609,25 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
if (ret < 0)
return ret;
if (pic->reordered_opaque) {
ReorderedData *rd;
int rd_idx = rd_get(ctx);
if (rd_idx < 0) {
free_picture(ctx, &x265pic);
return rd_idx;
}
x265pic.userData = (void*)(intptr_t)(rd_idx + 1);
rd = &ctx->rd[rd_idx];
rd->reordered_opaque = pic->reordered_opaque;
rd_idx = rd_get(ctx);
if (rd_idx < 0) {
free_picture(ctx, &x265pic);
return rd_idx;
}
rd = &ctx->rd[rd_idx];
rd->reordered_opaque = pic->reordered_opaque;
if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
rd->frame_opaque = pic->opaque;
ret = av_buffer_replace(&rd->frame_opaque_ref, pic->opaque_ref);
if (ret < 0) {
rd_release(ctx, rd_idx);
free_picture(ctx, &x265pic);
return ret;
}
}
x265pic.userData = (void*)(intptr_t)(rd_idx + 1);
if (ctx->a53_cc) {
void *sei_data;
@ -742,6 +756,12 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
avctx->reordered_opaque = rd->reordered_opaque;
if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
pkt->opaque = rd->frame_opaque;
pkt->opaque_ref = rd->frame_opaque_ref;
rd->frame_opaque_ref = NULL;
}
rd_release(ctx, idx);
} else
avctx->reordered_opaque = 0;

1
libavcodec/options_table.h
View File

@ -58,6 +58,7 @@ static const AVOption avcodec_options[] = {
{"loop", "use loop filter", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_LOOP_FILTER }, INT_MIN, INT_MAX, V|E, "flags"},
{"qscale", "use fixed qscale", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_QSCALE }, INT_MIN, INT_MAX, 0, "flags"},
{"recon_frame", "export reconstructed frames", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_RECON_FRAME}, .unit = "flags"},
{"copy_opaque", "propagate opaque values", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_COPY_OPAQUE}, .unit = "flags"},
{"pass1", "use internal 2-pass ratecontrol in first pass mode", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_PASS1 }, INT_MIN, INT_MAX, 0, "flags"},
{"pass2", "use internal 2-pass ratecontrol in second pass mode", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_PASS2 }, INT_MIN, INT_MAX, 0, "flags"},
{"gray", "only decode/encode grayscale", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG_GRAY }, INT_MIN, INT_MAX, V|E|D, "flags"},

2
libavcodec/version.h
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@ -29,7 +29,7 @@
#include "version_major.h"
#define LIBAVCODEC_VERSION_MINOR 58
#define LIBAVCODEC_VERSION_MINOR 59
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \