har0ke/FFmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
FFmpeg/fftools/ffmpeg_enc.c
Anton Khirnov ee2a8cbfd1 fftools/ffmpeg_enc: move encoding to a separate thread 
As for the analogous decoding change, this is only a preparatory step to
a fully threaded architecture and does not yet make encoding truly
parallel. The main thread will currently submit a frame and wait until
it has been fully processed by the encoder before moving on. That will
change in future commits after filters are moved to threads and a
thread-aware scheduler is added.

This code suffers from a known issue -  if an encoder with a sync queue
receives EOF it will terminate after processing everything it currently
has, even though the sync queue might still be triggered by other
threads. That will be fixed in following commits.
2023-12-12 08:24:18 +01:00

1169 lines
36 KiB
C
Raw Blame History

/*
* 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 <math.h>
#include <stdint.h>
#include "ffmpeg.h"
#include "ffmpeg_utils.h"
#include "thread_queue.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/avutil.h"
#include "libavutil/dict.h"
#include "libavutil/display.h"
#include "libavutil/eval.h"
#include "libavutil/frame.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/pixdesc.h"
#include "libavutil/rational.h"
#include "libavutil/timestamp.h"
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
struct Encoder {
AVFrame *sq_frame;
// packet for receiving encoded output
AVPacket *pkt;
AVFrame *sub_frame;
// combined size of all the packets received from the encoder
uint64_t data_size;
// number of packets received from the encoder
uint64_t packets_encoded;
int opened;
int finished;
pthread_t thread;
/**
* Queue for sending frames from the main thread to
* the encoder thread.
*/
ThreadQueue *queue_in;
/**
* Queue for sending encoded packets from the encoder thread
* to the main thread.
*
* An empty packet is sent to signal that a previously sent
* frame has been fully processed.
*/
ThreadQueue *queue_out;
};
// data that is local to the decoder thread and not visible outside of it
typedef struct EncoderThread {
AVFrame *frame;
AVPacket *pkt;
} EncoderThread;
static int enc_thread_stop(Encoder *e)
{
void *ret;
if (!e->queue_in)
return 0;
tq_send_finish(e->queue_in, 0);
tq_receive_finish(e->queue_out, 0);
pthread_join(e->thread, &ret);
tq_free(&e->queue_in);
tq_free(&e->queue_out);
return (int)(intptr_t)ret;
}
void enc_free(Encoder **penc)
{
Encoder *enc = *penc;
if (!enc)
return;
enc_thread_stop(enc);
av_frame_free(&enc->sq_frame);
av_frame_free(&enc->sub_frame);
av_packet_free(&enc->pkt);
av_freep(penc);
}
int enc_alloc(Encoder **penc, const AVCodec *codec)
{
Encoder *enc;
*penc = NULL;
enc = av_mallocz(sizeof(*enc));
if (!enc)
return AVERROR(ENOMEM);
if (codec->type == AVMEDIA_TYPE_SUBTITLE) {
enc->sub_frame = av_frame_alloc();
if (!enc->sub_frame)
goto fail;
}
enc->pkt = av_packet_alloc();
if (!enc->pkt)
goto fail;
*penc = enc;
return 0;
fail:
enc_free(&enc);
return AVERROR(ENOMEM);
}
static int hw_device_setup_for_encode(OutputStream *ost, AVBufferRef *frames_ref)
{
const AVCodecHWConfig *config;
HWDevice *dev = NULL;
int i;
if (frames_ref &&
((AVHWFramesContext*)frames_ref->data)->format ==
ost->enc_ctx->pix_fmt) {
// Matching format, will try to use hw_frames_ctx.
} else {
frames_ref = NULL;
}
for (i = 0;; i++) {
config = avcodec_get_hw_config(ost->enc_ctx->codec, i);
if (!config)
break;
if (frames_ref &&
config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
(config->pix_fmt == AV_PIX_FMT_NONE ||
config->pix_fmt == ost->enc_ctx->pix_fmt)) {
av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input "
"frames context (format %s) with %s encoder.\n",
av_get_pix_fmt_name(ost->enc_ctx->pix_fmt),
ost->enc_ctx->codec->name);
ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref);
if (!ost->enc_ctx->hw_frames_ctx)
return AVERROR(ENOMEM);
return 0;
}
if (!dev &&
config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)
dev = hw_device_get_by_type(config->device_type);
}
if (dev) {
av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s "
"(type %s) with %s encoder.\n", dev->name,
av_hwdevice_get_type_name(dev->type), ost->enc_ctx->codec->name);
ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
if (!ost->enc_ctx->hw_device_ctx)
return AVERROR(ENOMEM);
} else {
// No device required, or no device available.
}
return 0;
}
static int set_encoder_id(OutputFile *of, OutputStream *ost)
{
const char *cname = ost->enc_ctx->codec->name;
uint8_t *encoder_string;
int encoder_string_len;
if (av_dict_get(ost->st->metadata, "encoder", NULL, 0))
return 0;
encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(cname) + 2;
encoder_string = av_mallocz(encoder_string_len);
if (!encoder_string)
return AVERROR(ENOMEM);
if (!of->bitexact && !ost->bitexact)
av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
else
av_strlcpy(encoder_string, "Lavc ", encoder_string_len);
av_strlcat(encoder_string, cname, encoder_string_len);
av_dict_set(&ost->st->metadata, "encoder", encoder_string,
AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
return 0;
}
static void *encoder_thread(void *arg);
static int enc_thread_start(OutputStream *ost)
{
Encoder *e = ost->enc;
ObjPool *op;
int ret = 0;
op = objpool_alloc_frames();
if (!op)
return AVERROR(ENOMEM);
e->queue_in = tq_alloc(1, 1, op, frame_move);
if (!e->queue_in) {
objpool_free(&op);
return AVERROR(ENOMEM);
}
op = objpool_alloc_packets();
if (!op)
goto fail;
e->queue_out = tq_alloc(1, 4, op, pkt_move);
if (!e->queue_out) {
objpool_free(&op);
goto fail;
}
ret = pthread_create(&e->thread, NULL, encoder_thread, ost);
if (ret) {
ret = AVERROR(ret);
av_log(ost, AV_LOG_ERROR, "pthread_create() failed: %s\n",
av_err2str(ret));
goto fail;
}
return 0;
fail:
if (ret >= 0)
ret = AVERROR(ENOMEM);
tq_free(&e->queue_in);
tq_free(&e->queue_out);
return ret;
}
int enc_open(OutputStream *ost, const AVFrame *frame)
{
InputStream *ist = ost->ist;
Encoder *e = ost->enc;
AVCodecContext *enc_ctx = ost->enc_ctx;
AVCodecContext *dec_ctx = NULL;
const AVCodec *enc = enc_ctx->codec;
OutputFile *of = output_files[ost->file_index];
FrameData *fd;
int ret;
if (e->opened)
return 0;
// frame is always non-NULL for audio and video
av_assert0(frame || (enc->type != AVMEDIA_TYPE_VIDEO && enc->type != AVMEDIA_TYPE_AUDIO));
if (frame) {
av_assert0(frame->opaque_ref);
fd = (FrameData*)frame->opaque_ref->data;
}
ret = set_encoder_id(output_files[ost->file_index], ost);
if (ret < 0)
return ret;
if (ist) {
dec_ctx = ist->dec_ctx;
}
// the timebase is chosen by filtering code
if (ost->type == AVMEDIA_TYPE_AUDIO || ost->type == AVMEDIA_TYPE_VIDEO) {
enc_ctx->time_base = frame->time_base;
enc_ctx->framerate = fd->frame_rate_filter;
ost->st->avg_frame_rate = fd->frame_rate_filter;
}
switch (enc_ctx->codec_type) {
case AVMEDIA_TYPE_AUDIO:
enc_ctx->sample_fmt = frame->format;
enc_ctx->sample_rate = frame->sample_rate;
ret = av_channel_layout_copy(&enc_ctx->ch_layout, &frame->ch_layout);
if (ret < 0)
return ret;
if (ost->bits_per_raw_sample)
enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample;
else
enc_ctx->bits_per_raw_sample = FFMIN(fd->bits_per_raw_sample,
av_get_bytes_per_sample(enc_ctx->sample_fmt) << 3);
break;
case AVMEDIA_TYPE_VIDEO: {
enc_ctx->width = frame->width;
enc_ctx->height = frame->height;
enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) :
frame->sample_aspect_ratio;
enc_ctx->pix_fmt = frame->format;
if (ost->bits_per_raw_sample)
enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample;
else
enc_ctx->bits_per_raw_sample = FFMIN(fd->bits_per_raw_sample,
av_pix_fmt_desc_get(enc_ctx->pix_fmt)->comp[0].depth);
enc_ctx->color_range = frame->color_range;
enc_ctx->color_primaries = frame->color_primaries;
enc_ctx->color_trc = frame->color_trc;
enc_ctx->colorspace = frame->colorspace;
enc_ctx->chroma_sample_location = frame->chroma_location;
if (enc_ctx->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) ||
(frame->flags & AV_FRAME_FLAG_INTERLACED)
#if FFMPEG_OPT_TOP
|| ost->top_field_first >= 0
#endif
) {
int top_field_first =
#if FFMPEG_OPT_TOP
ost->top_field_first >= 0 ?
ost->top_field_first :
#endif
!!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST);
if (enc->id == AV_CODEC_ID_MJPEG)
enc_ctx->field_order = top_field_first ? AV_FIELD_TT : AV_FIELD_BB;
else
enc_ctx->field_order = top_field_first ? AV_FIELD_TB : AV_FIELD_BT;
} else
enc_ctx->field_order = AV_FIELD_PROGRESSIVE;
break;
}
case AVMEDIA_TYPE_SUBTITLE:
if (ost->enc_timebase.num)
av_log(ost, AV_LOG_WARNING,
"-enc_time_base not supported for subtitles, ignoring\n");
enc_ctx->time_base = AV_TIME_BASE_Q;
if (!enc_ctx->width) {
enc_ctx->width = ost->ist->par->width;
enc_ctx->height = ost->ist->par->height;
}
if (dec_ctx && dec_ctx->subtitle_header) {
/* ASS code assumes this buffer is null terminated so add extra byte. */
enc_ctx->subtitle_header = av_mallocz(dec_ctx->subtitle_header_size + 1);
if (!enc_ctx->subtitle_header)
return AVERROR(ENOMEM);
memcpy(enc_ctx->subtitle_header, dec_ctx->subtitle_header,
dec_ctx->subtitle_header_size);
enc_ctx->subtitle_header_size = dec_ctx->subtitle_header_size;
}
break;
default:
av_assert0(0);
break;
}
if (ost->bitexact)
enc_ctx->flags |= AV_CODEC_FLAG_BITEXACT;
if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
if (enc->capabilities & AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE) {
ret = av_dict_set(&ost->encoder_opts, "flags", "+copy_opaque", AV_DICT_MULTIKEY);
if (ret < 0)
return ret;
}
av_dict_set(&ost->encoder_opts, "flags", "+frame_duration", AV_DICT_MULTIKEY);
ret = hw_device_setup_for_encode(ost, frame ? frame->hw_frames_ctx : NULL);
if (ret < 0) {
av_log(ost, AV_LOG_ERROR,
"Encoding hardware device setup failed: %s\n", av_err2str(ret));
return ret;
}
if ((ret = avcodec_open2(ost->enc_ctx, enc, &ost->encoder_opts)) < 0) {
if (ret != AVERROR_EXPERIMENTAL)
av_log(ost, AV_LOG_ERROR, "Error while opening encoder - maybe "
"incorrect parameters such as bit_rate, rate, width or height.\n");
return ret;
}
e->opened = 1;
if (ost->sq_idx_encode >= 0) {
e->sq_frame = av_frame_alloc();
if (!e->sq_frame)
return AVERROR(ENOMEM);
}
if (ost->enc_ctx->frame_size) {
av_assert0(ost->sq_idx_encode >= 0);
sq_frame_samples(output_files[ost->file_index]->sq_encode,
ost->sq_idx_encode, ost->enc_ctx->frame_size);
}
ret = check_avoptions(ost->encoder_opts);
if (ret < 0)
return ret;
if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000 &&
ost->enc_ctx->codec_id != AV_CODEC_ID_CODEC2 /* don't complain about 700 bit/s modes */)
av_log(ost, AV_LOG_WARNING, "The bitrate parameter is set too low."
" It takes bits/s as argument, not kbits/s\n");
ret = avcodec_parameters_from_context(ost->par_in, ost->enc_ctx);
if (ret < 0) {
av_log(ost, AV_LOG_FATAL,
"Error initializing the output stream codec context.\n");
return ret;
}
/*
* Add global input side data. For now this is naive, and copies it
* from the input stream's global side data. All side data should
* really be funneled over AVFrame and libavfilter, then added back to
* packet side data, and then potentially using the first packet for
* global side data.
*/
if (ist) {
int i;
for (i = 0; i < ist->st->codecpar->nb_coded_side_data; i++) {
AVPacketSideData *sd_src = &ist->st->codecpar->coded_side_data[i];
if (sd_src->type != AV_PKT_DATA_CPB_PROPERTIES) {
AVPacketSideData *sd_dst = av_packet_side_data_new(&ost->par_in->coded_side_data,
&ost->par_in->nb_coded_side_data,
sd_src->type, sd_src->size, 0);
if (!sd_dst)
return AVERROR(ENOMEM);
memcpy(sd_dst->data, sd_src->data, sd_src->size);
if (ist->autorotate && sd_src->type == AV_PKT_DATA_DISPLAYMATRIX)
av_display_rotation_set((int32_t *)sd_dst->data, 0);
}
}
}
// copy timebase while removing common factors
if (ost->st->time_base.num <= 0 || ost->st->time_base.den <= 0)
ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1});
ret = enc_thread_start(ost);
if (ret < 0) {
av_log(ost, AV_LOG_ERROR, "Error starting encoder thread: %s\n",
av_err2str(ret));
return ret;
}
ret = of_stream_init(of, ost);
if (ret < 0)
return ret;
return 0;
}
static int check_recording_time(OutputStream *ost, int64_t ts, AVRational tb)
{
OutputFile *of = output_files[ost->file_index];
if (of->recording_time != INT64_MAX &&
av_compare_ts(ts, tb, of->recording_time, AV_TIME_BASE_Q) >= 0) {
return 0;
}
return 1;
}
static int do_subtitle_out(OutputFile *of, OutputStream *ost, const AVSubtitle *sub,
AVPacket *pkt)
{
Encoder *e = ost->enc;
int subtitle_out_max_size = 1024 * 1024;
int subtitle_out_size, nb, i, ret;
AVCodecContext *enc;
int64_t pts;
if (sub->pts == AV_NOPTS_VALUE) {
av_log(ost, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
return exit_on_error ? AVERROR(EINVAL) : 0;
}
if (ost->finished ||
(of->start_time != AV_NOPTS_VALUE && sub->pts < of->start_time))
return 0;
enc = ost->enc_ctx;
/* Note: DVB subtitle need one packet to draw them and one other
packet to clear them */
/* XXX: signal it in the codec context ? */
if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
nb = 2;
else if (enc->codec_id == AV_CODEC_ID_ASS)
nb = FFMAX(sub->num_rects, 1);
else
nb = 1;
/* shift timestamp to honor -ss and make check_recording_time() work with -t */
pts = sub->pts;
if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
pts -= output_files[ost->file_index]->start_time;
for (i = 0; i < nb; i++) {
AVSubtitle local_sub = *sub;
if (!check_recording_time(ost, pts, AV_TIME_BASE_Q))
return AVERROR_EOF;
ret = av_new_packet(pkt, subtitle_out_max_size);
if (ret < 0)
return AVERROR(ENOMEM);
local_sub.pts = pts;
// start_display_time is required to be 0
local_sub.pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
local_sub.end_display_time -= sub->start_display_time;
local_sub.start_display_time = 0;
if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE && i == 1)
local_sub.num_rects = 0;
else if (enc->codec_id == AV_CODEC_ID_ASS && sub->num_rects > 0) {
local_sub.num_rects = 1;
local_sub.rects += i;
}
ost->frames_encoded++;
subtitle_out_size = avcodec_encode_subtitle(enc, pkt->data, pkt->size, &local_sub);
if (subtitle_out_size < 0) {
av_log(ost, AV_LOG_FATAL, "Subtitle encoding failed\n");
return subtitle_out_size;
}
av_shrink_packet(pkt, subtitle_out_size);
pkt->time_base = AV_TIME_BASE_Q;
pkt->pts = sub->pts;
pkt->duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base);
if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
/* XXX: the pts correction is handled here. Maybe handling
it in the codec would be better */
if (i == 0)
pkt->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, pkt->time_base);
else
pkt->pts += av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base);
}
pkt->dts = pkt->pts;
ret = tq_send(e->queue_out, 0, pkt);
if (ret < 0) {
av_packet_unref(pkt);
return ret;
}
}
return 0;
}
void enc_stats_write(OutputStream *ost, EncStats *es,
const AVFrame *frame, const AVPacket *pkt,
uint64_t frame_num)
{
Encoder *e = ost->enc;
AVIOContext *io = es->io;
AVRational tb = frame ? frame->time_base : pkt->time_base;
int64_t pts = frame ? frame->pts : pkt->pts;
AVRational tbi = (AVRational){ 0, 1};
int64_t ptsi = INT64_MAX;
const FrameData *fd;
if ((frame && frame->opaque_ref) || (pkt && pkt->opaque_ref)) {
fd = (const FrameData*)(frame ? frame->opaque_ref->data : pkt->opaque_ref->data);
tbi = fd->dec.tb;
ptsi = fd->dec.pts;
}
for (size_t i = 0; i < es->nb_components; i++) {
const EncStatsComponent *c = &es->components[i];
switch (c->type) {
case ENC_STATS_LITERAL: avio_write (io, c->str, c->str_len); continue;
case ENC_STATS_FILE_IDX: avio_printf(io, "%d", ost->file_index); continue;
case ENC_STATS_STREAM_IDX: avio_printf(io, "%d", ost->index); continue;
case ENC_STATS_TIMEBASE: avio_printf(io, "%d/%d", tb.num, tb.den); continue;
case ENC_STATS_TIMEBASE_IN: avio_printf(io, "%d/%d", tbi.num, tbi.den); continue;
case ENC_STATS_PTS: avio_printf(io, "%"PRId64, pts); continue;
case ENC_STATS_PTS_IN: avio_printf(io, "%"PRId64, ptsi); continue;
case ENC_STATS_PTS_TIME: avio_printf(io, "%g", pts * av_q2d(tb)); continue;
case ENC_STATS_PTS_TIME_IN: avio_printf(io, "%g", ptsi == INT64_MAX ?
INFINITY : ptsi * av_q2d(tbi)); continue;
case ENC_STATS_FRAME_NUM: avio_printf(io, "%"PRIu64, frame_num); continue;
case ENC_STATS_FRAME_NUM_IN: avio_printf(io, "%"PRIu64, fd ? fd->dec.frame_num : -1); continue;
}
if (frame) {
switch (c->type) {
case ENC_STATS_SAMPLE_NUM: avio_printf(io, "%"PRIu64, ost->samples_encoded); continue;
case ENC_STATS_NB_SAMPLES: avio_printf(io, "%d", frame->nb_samples); continue;
default: av_assert0(0);
}
} else {
switch (c->type) {
case ENC_STATS_DTS: avio_printf(io, "%"PRId64, pkt->dts); continue;
case ENC_STATS_DTS_TIME: avio_printf(io, "%g", pkt->dts * av_q2d(tb)); continue;
case ENC_STATS_PKT_SIZE: avio_printf(io, "%d", pkt->size); continue;
case ENC_STATS_BITRATE: {
double duration = FFMAX(pkt->duration, 1) * av_q2d(tb);
avio_printf(io, "%g", 8.0 * pkt->size / duration);
continue;
}
case ENC_STATS_AVG_BITRATE: {
double duration = pkt->dts * av_q2d(tb);
avio_printf(io, "%g", duration > 0 ? 8.0 * e->data_size / duration : -1.);
continue;
}
default: av_assert0(0);
}
}
}
avio_w8(io, '\n');
avio_flush(io);
}
static inline double psnr(double d)
{
return -10.0 * log10(d);
}
static int update_video_stats(OutputStream *ost, const AVPacket *pkt, int write_vstats)
{
Encoder *e = ost->enc;
const uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
NULL);
AVCodecContext *enc = ost->enc_ctx;
enum AVPictureType pict_type;
int64_t frame_number;
double ti1, bitrate, avg_bitrate;
double psnr_val = -1;
ost->quality = sd ? AV_RL32(sd) : -1;
pict_type = sd ? sd[4] : AV_PICTURE_TYPE_NONE;
if ((enc->flags & AV_CODEC_FLAG_PSNR) && sd && sd[5]) {
// FIXME the scaling assumes 8bit
double error = AV_RL64(sd + 8) / (enc->width * enc->height * 255.0 * 255.0);
if (error >= 0 && error <= 1)
psnr_val = psnr(error);
}
if (!write_vstats)
return 0;
/* this is executed just the first time update_video_stats is called */
if (!vstats_file) {
vstats_file = fopen(vstats_filename, "w");
if (!vstats_file) {
perror("fopen");
return AVERROR(errno);
}
}
frame_number = e->packets_encoded;
if (vstats_version <= 1) {
fprintf(vstats_file, "frame= %5"PRId64" q= %2.1f ", frame_number,
ost->quality / (float)FF_QP2LAMBDA);
} else {
fprintf(vstats_file, "out= %2d st= %2d frame= %5"PRId64" q= %2.1f ", ost->file_index, ost->index, frame_number,
ost->quality / (float)FF_QP2LAMBDA);
}
if (psnr_val >= 0)
fprintf(vstats_file, "PSNR= %6.2f ", psnr_val);
fprintf(vstats_file,"f_size= %6d ", pkt->size);
/* compute pts value */
ti1 = pkt->dts * av_q2d(pkt->time_base);
if (ti1 < 0.01)
ti1 = 0.01;
bitrate = (pkt->size * 8) / av_q2d(enc->time_base) / 1000.0;
avg_bitrate = (double)(e->data_size * 8) / ti1 / 1000.0;
fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
(double)e->data_size / 1024, ti1, bitrate, avg_bitrate);
fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(pict_type));
return 0;
}
static int encode_frame(OutputFile *of, OutputStream *ost, AVFrame *frame,
AVPacket *pkt)
{
Encoder *e = ost->enc;
AVCodecContext *enc = ost->enc_ctx;
const char *type_desc = av_get_media_type_string(enc->codec_type);
const char *action = frame ? "encode" : "flush";
int ret;
if (frame) {
if (ost->enc_stats_pre.io)
enc_stats_write(ost, &ost->enc_stats_pre, frame, NULL,
ost->frames_encoded);
ost->frames_encoded++;
ost->samples_encoded += frame->nb_samples;
if (debug_ts) {
av_log(ost, AV_LOG_INFO, "encoder <- type:%s "
"frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
type_desc,
av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base),
enc->time_base.num, enc->time_base.den);
}
if (frame->sample_aspect_ratio.num && !ost->frame_aspect_ratio.num)
enc->sample_aspect_ratio = frame->sample_aspect_ratio;
}
update_benchmark(NULL);
ret = avcodec_send_frame(enc, frame);
if (ret < 0 && !(ret == AVERROR_EOF && !frame)) {
av_log(ost, AV_LOG_ERROR, "Error submitting %s frame to the encoder\n",
type_desc);
return ret;
}
while (1) {
av_packet_unref(pkt);
ret = avcodec_receive_packet(enc, pkt);
update_benchmark("%s_%s %d.%d", action, type_desc,
ost->file_index, ost->index);
pkt->time_base = enc->time_base;
/* if two pass, output log on success and EOF */
if ((ret >= 0 || ret == AVERROR_EOF) && ost->logfile && enc->stats_out)
fprintf(ost->logfile, "%s", enc->stats_out);
if (ret == AVERROR(EAGAIN)) {
av_assert0(frame); // should never happen during flushing
return 0;
} else if (ret < 0) {
if (ret != AVERROR_EOF)
av_log(ost, AV_LOG_ERROR, "%s encoding failed\n", type_desc);
return ret;
}
if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
ret = update_video_stats(ost, pkt, !!vstats_filename);
if (ret < 0)
return ret;
}
if (ost->enc_stats_post.io)
enc_stats_write(ost, &ost->enc_stats_post, NULL, pkt,
e->packets_encoded);
if (debug_ts) {
av_log(ost, AV_LOG_INFO, "encoder -> type:%s "
"pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s "
"duration:%s duration_time:%s\n",
type_desc,
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &enc->time_base),
av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base),
av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &enc->time_base));
}
if ((ret = trigger_fix_sub_duration_heartbeat(ost, pkt)) < 0) {
av_log(NULL, AV_LOG_ERROR,
"Subtitle heartbeat logic failed in %s! (%s)\n",
__func__, av_err2str(ret));
return ret;
}
e->data_size += pkt->size;
e->packets_encoded++;
ret = tq_send(e->queue_out, 0, pkt);
if (ret < 0) {
av_packet_unref(pkt);
return ret;
}
}
av_assert0(0);
}
static int submit_encode_frame(OutputFile *of, OutputStream *ost,
AVFrame *frame, AVPacket *pkt)
{
Encoder *e = ost->enc;
int ret;
if (ost->sq_idx_encode < 0)
return encode_frame(of, ost, frame, pkt);
if (frame) {
ret = av_frame_ref(e->sq_frame, frame);
if (ret < 0)
return ret;
frame = e->sq_frame;
}
ret = sq_send(of->sq_encode, ost->sq_idx_encode,
SQFRAME(frame));
if (ret < 0) {
if (frame)
av_frame_unref(frame);
if (ret != AVERROR_EOF)
return ret;
}
while (1) {
AVFrame *enc_frame = e->sq_frame;
ret = sq_receive(of->sq_encode, ost->sq_idx_encode,
SQFRAME(enc_frame));
if (ret == AVERROR_EOF) {
enc_frame = NULL;
} else if (ret < 0) {
return (ret == AVERROR(EAGAIN)) ? 0 : ret;
}
ret = encode_frame(of, ost, enc_frame, pkt);
if (enc_frame)
av_frame_unref(enc_frame);
if (ret < 0)
return ret;
}
}
static int do_audio_out(OutputFile *of, OutputStream *ost,
AVFrame *frame, AVPacket *pkt)
{
AVCodecContext *enc = ost->enc_ctx;
if (!(enc->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE) &&
enc->ch_layout.nb_channels != frame->ch_layout.nb_channels) {
av_log(ost, AV_LOG_ERROR,
"Audio channel count changed and encoder does not support parameter changes\n");
return 0;
}
if (!check_recording_time(ost, frame->pts, frame->time_base))
return AVERROR_EOF;
return submit_encode_frame(of, ost, frame, pkt);
}
static enum AVPictureType forced_kf_apply(void *logctx, KeyframeForceCtx *kf,
AVRational tb, const AVFrame *in_picture)
{
double pts_time;
if (kf->ref_pts == AV_NOPTS_VALUE)
kf->ref_pts = in_picture->pts;
pts_time = (in_picture->pts - kf->ref_pts) * av_q2d(tb);
if (kf->index < kf->nb_pts &&
av_compare_ts(in_picture->pts, tb, kf->pts[kf->index], AV_TIME_BASE_Q) >= 0) {
kf->index++;
goto force_keyframe;
} else if (kf->pexpr) {
double res;
kf->expr_const_values[FKF_T] = pts_time;
res = av_expr_eval(kf->pexpr,
kf->expr_const_values, NULL);
av_log(logctx, AV_LOG_TRACE,
"force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
kf->expr_const_values[FKF_N],
kf->expr_const_values[FKF_N_FORCED],
kf->expr_const_values[FKF_PREV_FORCED_N],
kf->expr_const_values[FKF_T],
kf->expr_const_values[FKF_PREV_FORCED_T],
res);
kf->expr_const_values[FKF_N] += 1;
if (res) {
kf->expr_const_values[FKF_PREV_FORCED_N] = kf->expr_const_values[FKF_N] - 1;
kf->expr_const_values[FKF_PREV_FORCED_T] = kf->expr_const_values[FKF_T];
kf->expr_const_values[FKF_N_FORCED] += 1;
goto force_keyframe;
}
} else if (kf->type == KF_FORCE_SOURCE && (in_picture->flags & AV_FRAME_FLAG_KEY)) {
goto force_keyframe;
}
return AV_PICTURE_TYPE_NONE;
force_keyframe:
av_log(logctx, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
return AV_PICTURE_TYPE_I;
}
/* May modify/reset frame */
static int do_video_out(OutputFile *of, OutputStream *ost,
AVFrame *in_picture, AVPacket *pkt)
{
AVCodecContext *enc = ost->enc_ctx;
if (!check_recording_time(ost, in_picture->pts, ost->enc_ctx->time_base))
return AVERROR_EOF;
in_picture->quality = enc->global_quality;
in_picture->pict_type = forced_kf_apply(ost, &ost->kf, enc->time_base, in_picture);
#if FFMPEG_OPT_TOP
if (ost->top_field_first >= 0) {
in_picture->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
in_picture->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * (!!ost->top_field_first);
}
#endif
return submit_encode_frame(of, ost, in_picture, pkt);
}
static int frame_encode(OutputStream *ost, AVFrame *frame, AVPacket *pkt)
{
OutputFile *of = output_files[ost->file_index];
enum AVMediaType type = ost->type;
if (type == AVMEDIA_TYPE_SUBTITLE) {
// no flushing for subtitles
return frame ?
do_subtitle_out(of, ost, (AVSubtitle*)frame->buf[0]->data, pkt) : 0;
}
if (frame) {
return (type == AVMEDIA_TYPE_VIDEO) ? do_video_out(of, ost, frame, pkt) :
do_audio_out(of, ost, frame, pkt);
}
return submit_encode_frame(of, ost, NULL, pkt);
}
static void enc_thread_set_name(const OutputStream *ost)
{
char name[16];
snprintf(name, sizeof(name), "enc%d:%d:%s", ost->file_index, ost->index,
ost->enc_ctx->codec->name);
ff_thread_setname(name);
}
static void enc_thread_uninit(EncoderThread *et)
{
av_packet_free(&et->pkt);
av_frame_free(&et->frame);
memset(et, 0, sizeof(*et));
}
static int enc_thread_init(EncoderThread *et)
{
memset(et, 0, sizeof(*et));
et->frame = av_frame_alloc();
if (!et->frame)
goto fail;
et->pkt = av_packet_alloc();
if (!et->pkt)
goto fail;
return 0;
fail:
enc_thread_uninit(et);
return AVERROR(ENOMEM);
}
static void *encoder_thread(void *arg)
{
OutputStream *ost = arg;
OutputFile *of = output_files[ost->file_index];
Encoder *e = ost->enc;
EncoderThread et;
int ret = 0, input_status = 0;
ret = enc_thread_init(&et);
if (ret < 0)
goto finish;
enc_thread_set_name(ost);
while (!input_status) {
int dummy;
input_status = tq_receive(e->queue_in, &dummy, et.frame);
if (input_status < 0)
av_log(ost, AV_LOG_VERBOSE, "Encoder thread received EOF\n");
ret = frame_encode(ost, input_status >= 0 ? et.frame : NULL, et.pkt);
av_packet_unref(et.pkt);
av_frame_unref(et.frame);
if (ret < 0) {
if (ret == AVERROR_EOF)
av_log(ost, AV_LOG_VERBOSE, "Encoder returned EOF, finishing\n");
else
av_log(ost, AV_LOG_ERROR, "Error encoding a frame: %s\n",
av_err2str(ret));
break;
}
// signal to the consumer thread that the frame was encoded
ret = tq_send(e->queue_out, 0, et.pkt);
if (ret < 0) {
if (ret != AVERROR_EOF)
av_log(ost, AV_LOG_ERROR,
"Error communicating with the main thread\n");
break;
}
}
// EOF is normal thread termination
if (ret == AVERROR_EOF)
ret = 0;
finish:
if (ost->sq_idx_encode >= 0)
sq_send(of->sq_encode, ost->sq_idx_encode, SQFRAME(NULL));
tq_receive_finish(e->queue_in, 0);
tq_send_finish (e->queue_out, 0);
enc_thread_uninit(&et);
av_log(ost, AV_LOG_VERBOSE, "Terminating encoder thread\n");
return (void*)(intptr_t)ret;
}
int enc_frame(OutputStream *ost, AVFrame *frame)
{
OutputFile *of = output_files[ost->file_index];
Encoder *e = ost->enc;
int ret, thread_ret;
ret = enc_open(ost, frame);
if (ret < 0)
return ret;
if (!e->queue_in)
return AVERROR_EOF;
// send the frame/EOF to the encoder thread
if (frame) {
ret = tq_send(e->queue_in, 0, frame);
if (ret < 0)
goto finish;
} else
tq_send_finish(e->queue_in, 0);
// retrieve all encoded data for the frame
while (1) {
int dummy;
ret = tq_receive(e->queue_out, &dummy, e->pkt);
if (ret < 0)
break;
// frame fully encoded
if (!e->pkt->data && !e->pkt->side_data_elems)
return 0;
// process the encoded packet
ret = of_output_packet(of, ost, e->pkt);
if (ret < 0)
goto finish;
}
finish:
thread_ret = enc_thread_stop(e);
if (thread_ret < 0) {
av_log(ost, AV_LOG_ERROR, "Encoder thread returned error: %s\n",
av_err2str(thread_ret));
ret = err_merge(ret, thread_ret);
}
if (ret < 0 && ret != AVERROR_EOF)
return ret;
// signal EOF to the muxer
return of_output_packet(of, ost, NULL);
}
int enc_subtitle(OutputFile *of, OutputStream *ost, const AVSubtitle *sub)
{
Encoder *e = ost->enc;
AVFrame *f = e->sub_frame;
int ret;
// XXX the queue for transferring data to the encoder thread runs
// on AVFrames, so we wrap AVSubtitle in an AVBufferRef and put
// that inside the frame
// eventually, subtitles should be switched to use AVFrames natively
ret = subtitle_wrap_frame(f, sub, 1);
if (ret < 0)
return ret;
ret = enc_frame(ost, f);
av_frame_unref(f);
return ret;
}
int enc_flush(void)
{
int ret = 0;
for (OutputStream *ost = ost_iter(NULL); ost; ost = ost_iter(ost)) {
OutputFile *of = output_files[ost->file_index];
if (ost->sq_idx_encode >= 0)
sq_send(of->sq_encode, ost->sq_idx_encode, SQFRAME(NULL));
}
for (OutputStream *ost = ost_iter(NULL); ost; ost = ost_iter(ost)) {
Encoder *e = ost->enc;
AVCodecContext *enc = ost->enc_ctx;
int err;
if (!enc || !e->opened ||
(enc->codec_type != AVMEDIA_TYPE_VIDEO && enc->codec_type != AVMEDIA_TYPE_AUDIO))
continue;
err = enc_frame(ost, NULL);
if (err != AVERROR_EOF && ret < 0)
ret = err_merge(ret, err);
av_assert0(!e->queue_in);
}
return ret;
}
Reference in New Issue View Git Blame Copy Permalink