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FFmpeg/libavcodec/encode.c

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/*
* generic encoding-related code
*
* 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/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/emms.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/samplefmt.h"
#include "avcodec.h"
#include "avcodec_internal.h"
#include "codec_desc.h"
#include "codec_internal.h"
#include "encode.h"
#include "frame_thread_encoder.h"
#include "internal.h"
typedef struct EncodeContext {
AVCodecInternal avci;
/**
* This is set to AV_PKT_FLAG_KEY for encoders that encode intra-only
* formats (i.e. whose codec descriptor has AV_CODEC_PROP_INTRA_ONLY set).
* This is used to set said flag generically for said encoders.
*/
int intra_only_flag;
/**
* An audio frame with less than required samples has been submitted (and
* potentially padded with silence). Reject all subsequent frames.
*/
int last_audio_frame;
} EncodeContext;
static EncodeContext *encode_ctx(AVCodecInternal *avci)
{
return (EncodeContext*)avci;
}
int ff_alloc_packet(AVCodecContext *avctx, AVPacket *avpkt, int64_t size)
{
if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
av_log(avctx, AV_LOG_ERROR, "Invalid minimum required packet size %"PRId64" (max allowed is %d)\n",
size, INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
return AVERROR(EINVAL);
}
av_assert0(!avpkt->data);
av_fast_padded_malloc(&avctx->internal->byte_buffer,
&avctx->internal->byte_buffer_size, size);
avpkt->data = avctx->internal->byte_buffer;
if (!avpkt->data) {
av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
return AVERROR(ENOMEM);
}
avpkt->size = size;
return 0;
}
int avcodec_default_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int flags)
{
int ret;
if (avpkt->size < 0 || avpkt->size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
return AVERROR(EINVAL);
if (avpkt->data || avpkt->buf) {
av_log(avctx, AV_LOG_ERROR, "avpkt->{data,buf} != NULL in avcodec_default_get_encode_buffer()\n");
return AVERROR(EINVAL);
}
ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %d\n", avpkt->size);
return ret;
}
avpkt->data = avpkt->buf->data;
return 0;
}
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
{
int ret;
if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
return AVERROR(EINVAL);
av_assert0(!avpkt->data && !avpkt->buf);
avpkt->size = size;
ret = avctx->get_encode_buffer(avctx, avpkt, flags);
if (ret < 0)
goto fail;
if (!avpkt->data || !avpkt->buf) {
av_log(avctx, AV_LOG_ERROR, "No buffer returned by get_encode_buffer()\n");
ret = AVERROR(EINVAL);
goto fail;
}
memset(avpkt->data + avpkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
ret = 0;
fail:
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "get_encode_buffer() failed\n");
av_packet_unref(avpkt);
}
return ret;
}
static int encode_make_refcounted(AVCodecContext *avctx, AVPacket *avpkt)
{
uint8_t *data = avpkt->data;
int ret;
if (avpkt->buf)
return 0;
avpkt->data = NULL;
ret = ff_get_encode_buffer(avctx, avpkt, avpkt->size, 0);
if (ret < 0)
return ret;
memcpy(avpkt->data, data, avpkt->size);
return 0;
}
/**
* Pad last frame with silence.
*/
static int pad_last_frame(AVCodecContext *s, AVFrame *frame, const AVFrame *src, int out_samples)
{
int ret;
frame->format = src->format;
frame->nb_samples = out_samples;
ret = av_channel_layout_copy(&frame->ch_layout, &s->ch_layout);
if (ret < 0)
goto fail;
ret = av_frame_get_buffer(frame, 0);
if (ret < 0)
goto fail;
ret = av_frame_copy_props(frame, src);
if (ret < 0)
goto fail;
if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
src->nb_samples, s->ch_layout.nb_channels,
s->sample_fmt)) < 0)
goto fail;
if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
frame->nb_samples - src->nb_samples,
s->ch_layout.nb_channels, s->sample_fmt)) < 0)
goto fail;
return 0;
fail:
av_frame_unref(frame);
encode_ctx(s->internal)->last_audio_frame = 0;
return ret;
}
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVSubtitle *sub)
{
int ret;
if (sub->start_display_time) {
av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
return -1;
}
ret = ffcodec(avctx->codec)->cb.encode_sub(avctx, buf, buf_size, sub);
avctx->frame_num++;
return ret;
}
int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
if (avci->draining)
return AVERROR_EOF;
if (!avci->buffer_frame->buf[0])
return AVERROR(EAGAIN);
av_frame_move_ref(frame, avci->buffer_frame);
#if FF_API_FRAME_KEY
FF_DISABLE_DEPRECATION_WARNINGS
if (frame->key_frame)
frame->flags |= AV_FRAME_FLAG_KEY;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#if FF_API_INTERLACED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
if (frame->interlaced_frame)
frame->flags |= AV_FRAME_FLAG_INTERLACED;
if (frame->top_field_first)
frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
return 0;
}
int ff_encode_reordered_opaque(AVCodecContext *avctx,
AVPacket *pkt, const AVFrame *frame)
{
if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
int ret = av_buffer_replace(&pkt->opaque_ref, frame->opaque_ref);
if (ret < 0)
return ret;
pkt->opaque = frame->opaque;
}
return 0;
}
int ff_encode_encode_cb(AVCodecContext *avctx, AVPacket *avpkt,
AVFrame *frame, int *got_packet)
{
const FFCodec *const codec = ffcodec(avctx->codec);
int ret;
ret = codec->cb.encode(avctx, avpkt, frame, got_packet);
emms_c();
av_assert0(ret <= 0);
if (!ret && *got_packet) {
if (avpkt->data) {
ret = encode_make_refcounted(avctx, avpkt);
if (ret < 0)
goto unref;
// Date returned by encoders must always be ref-counted
av_assert0(avpkt->buf);
}
// set the timestamps for the simple no-delay case
// encoders with delay have to set the timestamps themselves
if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) ||
(frame && (codec->caps_internal & FF_CODEC_CAP_EOF_FLUSH))) {
if (avpkt->pts == AV_NOPTS_VALUE)
avpkt->pts = frame->pts;
if (!avpkt->duration) {
if (frame->duration)
avpkt->duration = frame->duration;
else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
avpkt->duration = ff_samples_to_time_base(avctx,
frame->nb_samples);
}
}
ret = ff_encode_reordered_opaque(avctx, avpkt, frame);
if (ret < 0)
goto unref;
}
// dts equals pts unless there is reordering
// there can be no reordering if there is no encoder delay
if (!(avctx->codec_descriptor->props & AV_CODEC_PROP_REORDER) ||
!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) ||
(codec->caps_internal & FF_CODEC_CAP_EOF_FLUSH))
avpkt->dts = avpkt->pts;
} else {
unref:
av_packet_unref(avpkt);
}
if (frame)
av_frame_unref(frame);
return ret;
}
static int encode_simple_internal(AVCodecContext *avctx, AVPacket *avpkt)
{
AVCodecInternal *avci = avctx->internal;
AVFrame *frame = avci->in_frame;
const FFCodec *const codec = ffcodec(avctx->codec);
int got_packet;
int ret;
if (avci->draining_done)
return AVERROR_EOF;
if (!frame->buf[0] && !avci->draining) {
av_frame_unref(frame);
ret = ff_encode_get_frame(avctx, frame);
if (ret < 0 && ret != AVERROR_EOF)
return ret;
}
if (!frame->buf[0]) {
if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
avci->frame_thread_encoder))
return AVERROR_EOF;
// Flushing is signaled with a NULL frame
frame = NULL;
}
got_packet = 0;
av_assert0(codec->cb_type == FF_CODEC_CB_TYPE_ENCODE);
if (CONFIG_FRAME_THREAD_ENCODER && avci->frame_thread_encoder)
/* This will unref frame. */
ret = ff_thread_video_encode_frame(avctx, avpkt, frame, &got_packet);
else {
ret = ff_encode_encode_cb(avctx, avpkt, frame, &got_packet);
}
if (avci->draining && !got_packet)
avci->draining_done = 1;
return ret;
}
static int encode_simple_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
{
int ret;
while (!avpkt->data && !avpkt->side_data) {
ret = encode_simple_internal(avctx, avpkt);
if (ret < 0)
return ret;
}
return 0;
}
static int encode_receive_packet_internal(AVCodecContext *avctx, AVPacket *avpkt)
{
AVCodecInternal *avci = avctx->internal;
int ret;
if (avci->draining_done)
return AVERROR_EOF;
av_assert0(!avpkt->data && !avpkt->side_data);
if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
if ((avctx->flags & AV_CODEC_FLAG_PASS1) && avctx->stats_out)
avctx->stats_out[0] = '\0';
if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
return AVERROR(EINVAL);
}
if (ffcodec(avctx->codec)->cb_type == FF_CODEC_CB_TYPE_RECEIVE_PACKET) {
ret = ffcodec(avctx->codec)->cb.receive_packet(avctx, avpkt);
if (ret < 0)
av_packet_unref(avpkt);
else
// Encoders must always return ref-counted buffers.
// Side-data only packets have no data and can be not ref-counted.
av_assert0(!avpkt->data || avpkt->buf);
} else
ret = encode_simple_receive_packet(avctx, avpkt);
if (ret >= 0)
avpkt->flags |= encode_ctx(avci)->intra_only_flag;
if (ret == AVERROR_EOF)
avci->draining_done = 1;
return ret;
}
#if CONFIG_LCMS2
static int encode_generate_icc_profile(AVCodecContext *avctx, AVFrame *frame)
{
enum AVColorTransferCharacteristic trc = frame->color_trc;
enum AVColorPrimaries prim = frame->color_primaries;
const FFCodec *const codec = ffcodec(avctx->codec);
AVCodecInternal *avci = avctx->internal;
cmsHPROFILE profile;
int ret;
/* don't generate ICC profiles if disabled or unsupported */
if (!(avctx->flags2 & AV_CODEC_FLAG2_ICC_PROFILES))
return 0;
if (!(codec->caps_internal & FF_CODEC_CAP_ICC_PROFILES))
return 0;
if (trc == AVCOL_TRC_UNSPECIFIED)
trc = avctx->color_trc;
if (prim == AVCOL_PRI_UNSPECIFIED)
prim = avctx->color_primaries;
if (trc == AVCOL_TRC_UNSPECIFIED || prim == AVCOL_PRI_UNSPECIFIED)
return 0; /* can't generate ICC profile with missing csp tags */
if (av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE))
return 0; /* don't overwrite existing ICC profile */
if (!avci->icc.avctx) {
ret = ff_icc_context_init(&avci->icc, avctx);
if (ret < 0)
return ret;
}
ret = ff_icc_profile_generate(&avci->icc, prim, trc, &profile);
if (ret < 0)
return ret;
ret = ff_icc_profile_attach(&avci->icc, profile, frame);
cmsCloseProfile(profile);
return ret;
}
#else /* !CONFIG_LCMS2 */
static int encode_generate_icc_profile(av_unused AVCodecContext *c, av_unused AVFrame *f)
{
return 0;
}
#endif
static int encode_send_frame_internal(AVCodecContext *avctx, const AVFrame *src)
{
AVCodecInternal *avci = avctx->internal;
EncodeContext *ec = encode_ctx(avci);
AVFrame *dst = avci->buffer_frame;
int ret;
if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
/* extract audio service type metadata */
AVFrameSideData *sd = av_frame_get_side_data(src, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
if (sd && sd->size >= sizeof(enum AVAudioServiceType))
avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
/* check for valid frame size */
if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
/* if we already got an undersized frame, that must have been the last */
if (ec->last_audio_frame) {
av_log(avctx, AV_LOG_ERROR, "frame_size (%d) was not respected for a non-last frame\n", avctx->frame_size);
return AVERROR(EINVAL);
}
if (src->nb_samples > avctx->frame_size) {
av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) > frame_size (%d)\n", src->nb_samples, avctx->frame_size);
return AVERROR(EINVAL);
}
if (src->nb_samples < avctx->frame_size) {
ec->last_audio_frame = 1;
if (!(avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME)) {
int pad_samples = avci->pad_samples ? avci->pad_samples : avctx->frame_size;
int out_samples = (src->nb_samples + pad_samples - 1) / pad_samples * pad_samples;
if (out_samples != src->nb_samples) {
ret = pad_last_frame(avctx, dst, src, out_samples);
if (ret < 0)
return ret;
goto finish;
}
}
}
}
}
ret = av_frame_ref(dst, src);
if (ret < 0)
return ret;
finish:
if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
ret = encode_generate_icc_profile(avctx, dst);
if (ret < 0)
return ret;
}
// unset frame duration unless AV_CODEC_FLAG_FRAME_DURATION is set,
// since otherwise we cannot be sure that whatever value it has is in the
// right timebase, so we would produce an incorrect value, which is worse
// than none at all
if (!(avctx->flags & AV_CODEC_FLAG_FRAME_DURATION))
dst->duration = 0;
return 0;
}
int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
int ret;
if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
return AVERROR(EINVAL);
if (avci->draining)
return AVERROR_EOF;
if (avci->buffer_frame->buf[0])
return AVERROR(EAGAIN);
if (!frame) {
avci->draining = 1;
} else {
ret = encode_send_frame_internal(avctx, frame);
if (ret < 0)
return ret;
}
if (!avci->buffer_pkt->data && !avci->buffer_pkt->side_data) {
ret = encode_receive_packet_internal(avctx, avci->buffer_pkt);
if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
return ret;
}
avctx->frame_num++;
return 0;
}
int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
{
AVCodecInternal *avci = avctx->internal;
int ret;
av_packet_unref(avpkt);
if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
return AVERROR(EINVAL);
if (avci->buffer_pkt->data || avci->buffer_pkt->side_data) {
av_packet_move_ref(avpkt, avci->buffer_pkt);
} else {
ret = encode_receive_packet_internal(avctx, avpkt);
if (ret < 0)
return ret;
}
return 0;
}
static int encode_preinit_video(AVCodecContext *avctx)
{
const AVCodec *c = avctx->codec;
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
int i;
if (!av_get_pix_fmt_name(avctx->pix_fmt)) {
av_log(avctx, AV_LOG_ERROR, "Invalid video pixel format: %d\n",
avctx->pix_fmt);
return AVERROR(EINVAL);
}
if (c->pix_fmts) {
for (i = 0; c->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
if (avctx->pix_fmt == c->pix_fmts[i])
break;
if (c->pix_fmts[i] == AV_PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR,
"Specified pixel format %s is not supported by the %s encoder.\n",
av_get_pix_fmt_name(avctx->pix_fmt), c->name);
av_log(avctx, AV_LOG_ERROR, "Supported pixel formats:\n");
for (int p = 0; c->pix_fmts[p] != AV_PIX_FMT_NONE; p++) {
av_log(avctx, AV_LOG_ERROR, " %s\n",
av_get_pix_fmt_name(c->pix_fmts[p]));
}
return AVERROR(EINVAL);
}
if (c->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
c->pix_fmts[i] == AV_PIX_FMT_YUVJ411P ||
c->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
c->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
c->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
avctx->color_range = AVCOL_RANGE_JPEG;
}
if ( avctx->bits_per_raw_sample < 0
|| (avctx->bits_per_raw_sample > 8 && pixdesc->comp[0].depth <= 8)) {
av_log(avctx, AV_LOG_WARNING, "Specified bit depth %d not possible with the specified pixel formats depth %d\n",
avctx->bits_per_raw_sample, pixdesc->comp[0].depth);
avctx->bits_per_raw_sample = pixdesc->comp[0].depth;
}
if (avctx->width <= 0 || avctx->height <= 0) {
av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
return AVERROR(EINVAL);
}
#if FF_API_TICKS_PER_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
if (avctx->ticks_per_frame && avctx->time_base.num &&
avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
av_log(avctx, AV_LOG_ERROR,
"ticks_per_frame %d too large for the timebase %d/%d.",
avctx->ticks_per_frame,
avctx->time_base.num,
avctx->time_base.den);
return AVERROR(EINVAL);
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (avctx->hw_frames_ctx) {
AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
if (frames_ctx->format != avctx->pix_fmt) {
av_log(avctx, AV_LOG_ERROR,
"Mismatching AVCodecContext.pix_fmt and AVHWFramesContext.format\n");
return AVERROR(EINVAL);
}
if (avctx->sw_pix_fmt != AV_PIX_FMT_NONE &&
avctx->sw_pix_fmt != frames_ctx->sw_format) {
av_log(avctx, AV_LOG_ERROR,
"Mismatching AVCodecContext.sw_pix_fmt (%s) "
"and AVHWFramesContext.sw_format (%s)\n",
av_get_pix_fmt_name(avctx->sw_pix_fmt),
av_get_pix_fmt_name(frames_ctx->sw_format));
return AVERROR(EINVAL);
}
avctx->sw_pix_fmt = frames_ctx->sw_format;
}
return 0;
}
static int encode_preinit_audio(AVCodecContext *avctx)
{
const AVCodec *c = avctx->codec;
int i;
if (!av_get_sample_fmt_name(avctx->sample_fmt)) {
av_log(avctx, AV_LOG_ERROR, "Invalid audio sample format: %d\n",
avctx->sample_fmt);
return AVERROR(EINVAL);
}
if (avctx->sample_rate <= 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid audio sample rate: %d\n",
avctx->sample_rate);
return AVERROR(EINVAL);
}
if (c->sample_fmts) {
for (i = 0; c->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
if (avctx->sample_fmt == c->sample_fmts[i])
break;
if (avctx->ch_layout.nb_channels == 1 &&
av_get_planar_sample_fmt(avctx->sample_fmt) ==
av_get_planar_sample_fmt(c->sample_fmts[i])) {
avctx->sample_fmt = c->sample_fmts[i];
break;
}
}
if (c->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR,
"Specified sample format %s is not supported by the %s encoder\n",
av_get_sample_fmt_name(avctx->sample_fmt), c->name);
av_log(avctx, AV_LOG_ERROR, "Supported sample formats:\n");
for (int p = 0; c->sample_fmts[p] != AV_SAMPLE_FMT_NONE; p++) {
av_log(avctx, AV_LOG_ERROR, " %s\n",
av_get_sample_fmt_name(c->sample_fmts[p]));
}
return AVERROR(EINVAL);
}
}
if (c->supported_samplerates) {
for (i = 0; c->supported_samplerates[i] != 0; i++)
if (avctx->sample_rate == c->supported_samplerates[i])
break;
if (c->supported_samplerates[i] == 0) {
av_log(avctx, AV_LOG_ERROR,
"Specified sample rate %d is not supported by the %s encoder\n",
avctx->sample_rate, c->name);
av_log(avctx, AV_LOG_ERROR, "Supported sample rates:\n");
for (int p = 0; c->supported_samplerates[p]; p++)
av_log(avctx, AV_LOG_ERROR, " %d\n", c->supported_samplerates[p]);
return AVERROR(EINVAL);
}
}
if (c->ch_layouts) {
for (i = 0; c->ch_layouts[i].nb_channels; i++) {
if (!av_channel_layout_compare(&avctx->ch_layout, &c->ch_layouts[i]))
break;
}
if (!c->ch_layouts[i].nb_channels) {
char buf[512];
int ret = av_channel_layout_describe(&avctx->ch_layout, buf, sizeof(buf));
av_log(avctx, AV_LOG_ERROR,
"Specified channel layout '%s' is not supported by the %s encoder\n",
ret > 0 ? buf : "?", c->name);
av_log(avctx, AV_LOG_ERROR, "Supported channel layouts:\n");
for (int p = 0; c->ch_layouts[p].nb_channels; p++) {
ret = av_channel_layout_describe(&c->ch_layouts[p], buf, sizeof(buf));
av_log(avctx, AV_LOG_ERROR, " %s\n", ret > 0 ? buf : "?");
}
return AVERROR(EINVAL);
}
}
if (!avctx->bits_per_raw_sample)
avctx->bits_per_raw_sample = av_get_exact_bits_per_sample(avctx->codec_id);
if (!avctx->bits_per_raw_sample)
avctx->bits_per_raw_sample = 8 * av_get_bytes_per_sample(avctx->sample_fmt);
return 0;
}
int ff_encode_preinit(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
EncodeContext *ec = encode_ctx(avci);
int ret = 0;
if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {
av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");
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;
}
if (ret < 0)
return ret;
if ( (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
&& avctx->bit_rate>0 && avctx->bit_rate<1000) {
av_log(avctx, AV_LOG_WARNING, "Bitrate %"PRId64" is extremely low, maybe you mean %"PRId64"k\n", avctx->bit_rate, avctx->bit_rate);
}
if (!avctx->rc_initial_buffer_occupancy)
avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3LL / 4;
if (avctx->codec_descriptor->props & AV_CODEC_PROP_INTRA_ONLY)
ec->intra_only_flag = AV_PKT_FLAG_KEY;
if (ffcodec(avctx->codec)->cb_type == FF_CODEC_CB_TYPE_ENCODE) {
avci->in_frame = av_frame_alloc();
if (!avci->in_frame)
return AVERROR(ENOMEM);
}
if ((avctx->flags & AV_CODEC_FLAG_RECON_FRAME)) {
if (!(avctx->codec->capabilities & AV_CODEC_CAP_ENCODER_RECON_FRAME)) {
av_log(avctx, AV_LOG_ERROR, "Reconstructed frame output requested "
"from an encoder not supporting it\n");
return AVERROR(ENOSYS);
}
avci->recon_frame = av_frame_alloc();
if (!avci->recon_frame)
return AVERROR(ENOMEM);
}
if (CONFIG_FRAME_THREAD_ENCODER) {
ret = ff_frame_thread_encoder_init(avctx);
if (ret < 0)
return ret;
}
return 0;
}
int ff_encode_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
{
int ret;
switch (avctx->codec->type) {
case AVMEDIA_TYPE_VIDEO:
frame->format = avctx->pix_fmt;
if (frame->width <= 0 || frame->height <= 0) {
frame->width = FFMAX(avctx->width, avctx->coded_width);
frame->height = FFMAX(avctx->height, avctx->coded_height);
}
break;
case AVMEDIA_TYPE_AUDIO:
frame->sample_rate = avctx->sample_rate;
frame->format = avctx->sample_fmt;
if (!frame->ch_layout.nb_channels) {
ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
if (ret < 0)
return ret;
}
break;
}
ret = avcodec_default_get_buffer2(avctx, frame, 0);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
av_frame_unref(frame);
return ret;
}
return 0;
}
int ff_encode_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
if (!avci->recon_frame)
return AVERROR(EINVAL);
if (!avci->recon_frame->buf[0])
return avci->draining_done ? AVERROR_EOF : AVERROR(EAGAIN);
av_frame_move_ref(frame, avci->recon_frame);
return 0;
}
void ff_encode_flush_buffers(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
if (avci->in_frame)
av_frame_unref(avci->in_frame);
if (avci->recon_frame)
av_frame_unref(avci->recon_frame);
}
AVCodecInternal *ff_encode_internal_alloc(void)
{
return av_mallocz(sizeof(EncodeContext));
}
AVCPBProperties *ff_encode_add_cpb_side_data(AVCodecContext *avctx)
{
AVPacketSideData *tmp;
AVCPBProperties *props;
size_t size;
int i;
for (i = 0; i < avctx->nb_coded_side_data; i++)
if (avctx->coded_side_data[i].type == AV_PKT_DATA_CPB_PROPERTIES)
return (AVCPBProperties *)avctx->coded_side_data[i].data;
props = av_cpb_properties_alloc(&size);
if (!props)
return NULL;
tmp = av_realloc_array(avctx->coded_side_data, avctx->nb_coded_side_data + 1, sizeof(*tmp));
if (!tmp) {
av_freep(&props);
return NULL;
}
avctx->coded_side_data = tmp;
avctx->nb_coded_side_data++;
avctx->coded_side_data[avctx->nb_coded_side_data - 1].type = AV_PKT_DATA_CPB_PROPERTIES;
avctx->coded_side_data[avctx->nb_coded_side_data - 1].data = (uint8_t*)props;
avctx->coded_side_data[avctx->nb_coded_side_data - 1].size = size;
return props;
}