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FFmpeg/fftools/ffmpeg_dec.c
Anton Khirnov da420ac6e1 fftools/ffmpeg: add support for multiview video 
This extends the syntax for specifying input streams in -map and complex
filtergraph labels, to allow selecting a view by view ID, index, or
position. The corresponding decoder is then set up to decode the
appropriate view and send frames for that view to the correct
filtergraph input(s).
2024-09-23 17:15:02 +02:00

1761 lines
54 KiB
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/*
* 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 <stdbit.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/error.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/stereo3d.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/codec.h"
#include "ffmpeg.h"
typedef struct DecoderPriv {
Decoder dec;
AVCodecContext *dec_ctx;
AVFrame *frame;
AVFrame *frame_tmp_ref;
AVPacket *pkt;
// override output video sample aspect ratio with this value
AVRational sar_override;
AVRational framerate_in;
// a combination of DECODER_FLAG_*, provided to dec_open()
int flags;
int apply_cropping;
enum AVPixelFormat hwaccel_pix_fmt;
enum HWAccelID hwaccel_id;
enum AVHWDeviceType hwaccel_device_type;
enum AVPixelFormat hwaccel_output_format;
// pts/estimated duration of the last decoded frame
// * in decoder timebase for video,
// * in last_frame_tb (may change during decoding) for audio
int64_t last_frame_pts;
int64_t last_frame_duration_est;
AVRational last_frame_tb;
int64_t last_filter_in_rescale_delta;
int last_frame_sample_rate;
/* previous decoded subtitles */
AVFrame *sub_prev[2];
AVFrame *sub_heartbeat;
Scheduler *sch;
unsigned sch_idx;
// this decoder's index in decoders or -1
int index;
void *log_parent;
char log_name[32];
char *parent_name;
// user specified decoder multiview options manually
int multiview_user_config;
struct {
ViewSpecifier vs;
unsigned out_idx;
} *views_requested;
int nb_views_requested;
/* A map of view ID to decoder outputs.
* MUST NOT be accessed outside of get_format()/get_buffer() */
struct {
unsigned id;
uintptr_t out_mask;
} *view_map;
int nb_view_map;
struct {
AVDictionary *opts;
const AVCodec *codec;
} standalone_init;
} DecoderPriv;
static DecoderPriv *dp_from_dec(Decoder *d)
{
return (DecoderPriv*)d;
}
// data that is local to the decoder thread and not visible outside of it
typedef struct DecThreadContext {
AVFrame *frame;
AVPacket *pkt;
} DecThreadContext;
void dec_free(Decoder **pdec)
{
Decoder *dec = *pdec;
DecoderPriv *dp;
if (!dec)
return;
dp = dp_from_dec(dec);
avcodec_free_context(&dp->dec_ctx);
av_frame_free(&dp->frame);
av_frame_free(&dp->frame_tmp_ref);
av_packet_free(&dp->pkt);
av_dict_free(&dp->standalone_init.opts);
for (int i = 0; i < FF_ARRAY_ELEMS(dp->sub_prev); i++)
av_frame_free(&dp->sub_prev[i]);
av_frame_free(&dp->sub_heartbeat);
av_freep(&dp->parent_name);
av_freep(&dp->views_requested);
av_freep(&dp->view_map);
av_freep(pdec);
}
static const char *dec_item_name(void *obj)
{
const DecoderPriv *dp = obj;
return dp->log_name;
}
static const AVClass dec_class = {
.class_name = "Decoder",
.version = LIBAVUTIL_VERSION_INT,
.parent_log_context_offset = offsetof(DecoderPriv, log_parent),
.item_name = dec_item_name,
};
static int decoder_thread(void *arg);
static int dec_alloc(DecoderPriv **pdec, Scheduler *sch, int send_end_ts)
{
DecoderPriv *dp;
int ret = 0;
*pdec = NULL;
dp = av_mallocz(sizeof(*dp));
if (!dp)
return AVERROR(ENOMEM);
dp->frame = av_frame_alloc();
if (!dp->frame)
goto fail;
dp->pkt = av_packet_alloc();
if (!dp->pkt)
goto fail;
dp->index = -1;
dp->dec.class = &dec_class;
dp->last_filter_in_rescale_delta = AV_NOPTS_VALUE;
dp->last_frame_pts = AV_NOPTS_VALUE;
dp->last_frame_tb = (AVRational){ 1, 1 };
dp->hwaccel_pix_fmt = AV_PIX_FMT_NONE;
ret = sch_add_dec(sch, decoder_thread, dp, send_end_ts);
if (ret < 0)
goto fail;
dp->sch = sch;
dp->sch_idx = ret;
*pdec = dp;
return 0;
fail:
dec_free((Decoder**)&dp);
return ret >= 0 ? AVERROR(ENOMEM) : ret;
}
static AVRational audio_samplerate_update(DecoderPriv *dp,
const AVFrame *frame)
{
const int prev = dp->last_frame_tb.den;
const int sr = frame->sample_rate;
AVRational tb_new;
int64_t gcd;
if (frame->sample_rate == dp->last_frame_sample_rate)
goto finish;
gcd = av_gcd(prev, sr);
if (prev / gcd >= INT_MAX / sr) {
av_log(dp, AV_LOG_WARNING,
"Audio timestamps cannot be represented exactly after "
"sample rate change: %d -> %d\n", prev, sr);
// LCM of 192000, 44100, allows to represent all common samplerates
tb_new = (AVRational){ 1, 28224000 };
} else
tb_new = (AVRational){ 1, prev / gcd * sr };
// keep the frame timebase if it is strictly better than
// the samplerate-defined one
if (frame->time_base.num == 1 && frame->time_base.den > tb_new.den &&
!(frame->time_base.den % tb_new.den))
tb_new = frame->time_base;
if (dp->last_frame_pts != AV_NOPTS_VALUE)
dp->last_frame_pts = av_rescale_q(dp->last_frame_pts,
dp->last_frame_tb, tb_new);
dp->last_frame_duration_est = av_rescale_q(dp->last_frame_duration_est,
dp->last_frame_tb, tb_new);
dp->last_frame_tb = tb_new;
dp->last_frame_sample_rate = frame->sample_rate;
finish:
return dp->last_frame_tb;
}
static void audio_ts_process(DecoderPriv *dp, AVFrame *frame)
{
AVRational tb_filter = (AVRational){1, frame->sample_rate};
AVRational tb;
int64_t pts_pred;
// on samplerate change, choose a new internal timebase for timestamp
// generation that can represent timestamps from all the samplerates
// seen so far
tb = audio_samplerate_update(dp, frame);
pts_pred = dp->last_frame_pts == AV_NOPTS_VALUE ? 0 :
dp->last_frame_pts + dp->last_frame_duration_est;
if (frame->pts == AV_NOPTS_VALUE) {
frame->pts = pts_pred;
frame->time_base = tb;
} else if (dp->last_frame_pts != AV_NOPTS_VALUE &&
frame->pts > av_rescale_q_rnd(pts_pred, tb, frame->time_base,
AV_ROUND_UP)) {
// there was a gap in timestamps, reset conversion state
dp->last_filter_in_rescale_delta = AV_NOPTS_VALUE;
}
frame->pts = av_rescale_delta(frame->time_base, frame->pts,
tb, frame->nb_samples,
&dp->last_filter_in_rescale_delta, tb);
dp->last_frame_pts = frame->pts;
dp->last_frame_duration_est = av_rescale_q(frame->nb_samples,
tb_filter, tb);
// finally convert to filtering timebase
frame->pts = av_rescale_q(frame->pts, tb, tb_filter);
frame->duration = frame->nb_samples;
frame->time_base = tb_filter;
}
static int64_t video_duration_estimate(const DecoderPriv *dp, const AVFrame *frame)
{
const int ts_unreliable = dp->flags & DECODER_FLAG_TS_UNRELIABLE;
const int fr_forced = dp->flags & DECODER_FLAG_FRAMERATE_FORCED;
int64_t codec_duration = 0;
// difference between this and last frame's timestamps
const int64_t ts_diff =
(frame->pts != AV_NOPTS_VALUE && dp->last_frame_pts != AV_NOPTS_VALUE) ?
frame->pts - dp->last_frame_pts : -1;
// XXX lavf currently makes up frame durations when they are not provided by
// the container. As there is no way to reliably distinguish real container
// durations from the fake made-up ones, we use heuristics based on whether
// the container has timestamps. Eventually lavf should stop making up
// durations, then this should be simplified.
// frame duration is unreliable (typically guessed by lavf) when it is equal
// to 1 and the actual duration of the last frame is more than 2x larger
const int duration_unreliable = frame->duration == 1 && ts_diff > 2 * frame->duration;
// prefer frame duration for containers with timestamps
if (fr_forced ||
(frame->duration > 0 && !ts_unreliable && !duration_unreliable))
return frame->duration;
if (dp->dec_ctx->framerate.den && dp->dec_ctx->framerate.num) {
int fields = frame->repeat_pict + 2;
AVRational field_rate = av_mul_q(dp->dec_ctx->framerate,
(AVRational){ 2, 1 });
codec_duration = av_rescale_q(fields, av_inv_q(field_rate),
frame->time_base);
}
// prefer codec-layer duration for containers without timestamps
if (codec_duration > 0 && ts_unreliable)
return codec_duration;
// when timestamps are available, repeat last frame's actual duration
// (i.e. pts difference between this and last frame)
if (ts_diff > 0)
return ts_diff;
// try frame/codec duration
if (frame->duration > 0)
return frame->duration;
if (codec_duration > 0)
return codec_duration;
// try average framerate
if (dp->framerate_in.num && dp->framerate_in.den) {
int64_t d = av_rescale_q(1, av_inv_q(dp->framerate_in),
frame->time_base);
if (d > 0)
return d;
}
// last resort is last frame's estimated duration, and 1
return FFMAX(dp->last_frame_duration_est, 1);
}
static int hwaccel_retrieve_data(AVCodecContext *avctx, AVFrame *input)
{
DecoderPriv *dp = avctx->opaque;
AVFrame *output = NULL;
enum AVPixelFormat output_format = dp->hwaccel_output_format;
int err;
if (input->format == output_format) {
// Nothing to do.
return 0;
}
output = av_frame_alloc();
if (!output)
return AVERROR(ENOMEM);
output->format = output_format;
err = av_hwframe_transfer_data(output, input, 0);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Failed to transfer data to "
"output frame: %d.\n", err);
goto fail;
}
err = av_frame_copy_props(output, input);
if (err < 0) {
av_frame_unref(output);
goto fail;
}
av_frame_unref(input);
av_frame_move_ref(input, output);
av_frame_free(&output);
return 0;
fail:
av_frame_free(&output);
return err;
}
static int video_frame_process(DecoderPriv *dp, AVFrame *frame,
unsigned *outputs_mask)
{
#if FFMPEG_OPT_TOP
if (dp->flags & DECODER_FLAG_TOP_FIELD_FIRST) {
av_log(dp, AV_LOG_WARNING, "-top is deprecated, use the setfield filter instead\n");
frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
}
#endif
if (frame->format == dp->hwaccel_pix_fmt) {
int err = hwaccel_retrieve_data(dp->dec_ctx, frame);
if (err < 0)
return err;
}
frame->pts = frame->best_effort_timestamp;
// forced fixed framerate
if (dp->flags & DECODER_FLAG_FRAMERATE_FORCED) {
frame->pts = AV_NOPTS_VALUE;
frame->duration = 1;
frame->time_base = av_inv_q(dp->framerate_in);
}
// no timestamp available - extrapolate from previous frame duration
if (frame->pts == AV_NOPTS_VALUE)
frame->pts = dp->last_frame_pts == AV_NOPTS_VALUE ? 0 :
dp->last_frame_pts + dp->last_frame_duration_est;
// update timestamp history
dp->last_frame_duration_est = video_duration_estimate(dp, frame);
dp->last_frame_pts = frame->pts;
dp->last_frame_tb = frame->time_base;
if (debug_ts) {
av_log(dp, AV_LOG_INFO,
"decoder -> pts:%s pts_time:%s "
"pkt_dts:%s pkt_dts_time:%s "
"duration:%s duration_time:%s "
"keyframe:%d frame_type:%d time_base:%d/%d\n",
av_ts2str(frame->pts),
av_ts2timestr(frame->pts, &frame->time_base),
av_ts2str(frame->pkt_dts),
av_ts2timestr(frame->pkt_dts, &frame->time_base),
av_ts2str(frame->duration),
av_ts2timestr(frame->duration, &frame->time_base),
!!(frame->flags & AV_FRAME_FLAG_KEY), frame->pict_type,
frame->time_base.num, frame->time_base.den);
}
if (dp->sar_override.num)
frame->sample_aspect_ratio = dp->sar_override;
if (dp->apply_cropping) {
// lavfi does not require aligned frame data
int ret = av_frame_apply_cropping(frame, AV_FRAME_CROP_UNALIGNED);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Error applying decoder cropping\n");
return ret;
}
}
if (frame->opaque)
*outputs_mask = (uintptr_t)frame->opaque;
return 0;
}
static int copy_av_subtitle(AVSubtitle *dst, const AVSubtitle *src)
{
int ret = AVERROR_BUG;
AVSubtitle tmp = {
.format = src->format,
.start_display_time = src->start_display_time,
.end_display_time = src->end_display_time,
.num_rects = 0,
.rects = NULL,
.pts = src->pts
};
if (!src->num_rects)
goto success;
if (!(tmp.rects = av_calloc(src->num_rects, sizeof(*tmp.rects))))
return AVERROR(ENOMEM);
for (int i = 0; i < src->num_rects; i++) {
AVSubtitleRect *src_rect = src->rects[i];
AVSubtitleRect *dst_rect;
if (!(dst_rect = tmp.rects[i] = av_mallocz(sizeof(*tmp.rects[0])))) {
ret = AVERROR(ENOMEM);
goto cleanup;
}
tmp.num_rects++;
dst_rect->type = src_rect->type;
dst_rect->flags = src_rect->flags;
dst_rect->x = src_rect->x;
dst_rect->y = src_rect->y;
dst_rect->w = src_rect->w;
dst_rect->h = src_rect->h;
dst_rect->nb_colors = src_rect->nb_colors;
if (src_rect->text)
if (!(dst_rect->text = av_strdup(src_rect->text))) {
ret = AVERROR(ENOMEM);
goto cleanup;
}
if (src_rect->ass)
if (!(dst_rect->ass = av_strdup(src_rect->ass))) {
ret = AVERROR(ENOMEM);
goto cleanup;
}
for (int j = 0; j < 4; j++) {
// SUBTITLE_BITMAP images are special in the sense that they
// are like PAL8 images. first pointer to data, second to
// palette. This makes the size calculation match this.
size_t buf_size = src_rect->type == SUBTITLE_BITMAP && j == 1 ?
AVPALETTE_SIZE :
src_rect->h * src_rect->linesize[j];
if (!src_rect->data[j])
continue;
if (!(dst_rect->data[j] = av_memdup(src_rect->data[j], buf_size))) {
ret = AVERROR(ENOMEM);
goto cleanup;
}
dst_rect->linesize[j] = src_rect->linesize[j];
}
}
success:
*dst = tmp;
return 0;
cleanup:
avsubtitle_free(&tmp);
return ret;
}
static void subtitle_free(void *opaque, uint8_t *data)
{
AVSubtitle *sub = (AVSubtitle*)data;
avsubtitle_free(sub);
av_free(sub);
}
static int subtitle_wrap_frame(AVFrame *frame, AVSubtitle *subtitle, int copy)
{
AVBufferRef *buf;
AVSubtitle *sub;
int ret;
if (copy) {
sub = av_mallocz(sizeof(*sub));
ret = sub ? copy_av_subtitle(sub, subtitle) : AVERROR(ENOMEM);
if (ret < 0) {
av_freep(&sub);
return ret;
}
} else {
sub = av_memdup(subtitle, sizeof(*subtitle));
if (!sub)
return AVERROR(ENOMEM);
memset(subtitle, 0, sizeof(*subtitle));
}
buf = av_buffer_create((uint8_t*)sub, sizeof(*sub),
subtitle_free, NULL, 0);
if (!buf) {
avsubtitle_free(sub);
av_freep(&sub);
return AVERROR(ENOMEM);
}
frame->buf[0] = buf;
return 0;
}
static int process_subtitle(DecoderPriv *dp, AVFrame *frame)
{
const AVSubtitle *subtitle = (AVSubtitle*)frame->buf[0]->data;
int ret = 0;
if (dp->flags & DECODER_FLAG_FIX_SUB_DURATION) {
AVSubtitle *sub_prev = dp->sub_prev[0]->buf[0] ?
(AVSubtitle*)dp->sub_prev[0]->buf[0]->data : NULL;
int end = 1;
if (sub_prev) {
end = av_rescale(subtitle->pts - sub_prev->pts,
1000, AV_TIME_BASE);
if (end < sub_prev->end_display_time) {
av_log(dp, AV_LOG_DEBUG,
"Subtitle duration reduced from %"PRId32" to %d%s\n",
sub_prev->end_display_time, end,
end <= 0 ? ", dropping it" : "");
sub_prev->end_display_time = end;
}
}
av_frame_unref(dp->sub_prev[1]);
av_frame_move_ref(dp->sub_prev[1], frame);
frame = dp->sub_prev[0];
subtitle = frame->buf[0] ? (AVSubtitle*)frame->buf[0]->data : NULL;
FFSWAP(AVFrame*, dp->sub_prev[0], dp->sub_prev[1]);
if (end <= 0)
return 0;
}
if (!subtitle)
return 0;
ret = sch_dec_send(dp->sch, dp->sch_idx, 0, frame);
if (ret < 0)
av_frame_unref(frame);
return ret == AVERROR_EOF ? AVERROR_EXIT : ret;
}
static int fix_sub_duration_heartbeat(DecoderPriv *dp, int64_t signal_pts)
{
int ret = AVERROR_BUG;
AVSubtitle *prev_subtitle = dp->sub_prev[0]->buf[0] ?
(AVSubtitle*)dp->sub_prev[0]->buf[0]->data : NULL;
AVSubtitle *subtitle;
if (!(dp->flags & DECODER_FLAG_FIX_SUB_DURATION) || !prev_subtitle ||
!prev_subtitle->num_rects || signal_pts <= prev_subtitle->pts)
return 0;
av_frame_unref(dp->sub_heartbeat);
ret = subtitle_wrap_frame(dp->sub_heartbeat, prev_subtitle, 1);
if (ret < 0)
return ret;
subtitle = (AVSubtitle*)dp->sub_heartbeat->buf[0]->data;
subtitle->pts = signal_pts;
return process_subtitle(dp, dp->sub_heartbeat);
}
static int transcode_subtitles(DecoderPriv *dp, const AVPacket *pkt,
AVFrame *frame)
{
AVPacket *flush_pkt = NULL;
AVSubtitle subtitle;
int got_output;
int ret;
if (pkt && (intptr_t)pkt->opaque == PKT_OPAQUE_SUB_HEARTBEAT) {
frame->pts = pkt->pts;
frame->time_base = pkt->time_base;
frame->opaque = (void*)(intptr_t)FRAME_OPAQUE_SUB_HEARTBEAT;
ret = sch_dec_send(dp->sch, dp->sch_idx, 0, frame);
return ret == AVERROR_EOF ? AVERROR_EXIT : ret;
} else if (pkt && (intptr_t)pkt->opaque == PKT_OPAQUE_FIX_SUB_DURATION) {
return fix_sub_duration_heartbeat(dp, av_rescale_q(pkt->pts, pkt->time_base,
AV_TIME_BASE_Q));
}
if (!pkt) {
flush_pkt = av_packet_alloc();
if (!flush_pkt)
return AVERROR(ENOMEM);
}
ret = avcodec_decode_subtitle2(dp->dec_ctx, &subtitle, &got_output,
pkt ? pkt : flush_pkt);
av_packet_free(&flush_pkt);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Error decoding subtitles: %s\n",
av_err2str(ret));
dp->dec.decode_errors++;
return exit_on_error ? ret : 0;
}
if (!got_output)
return pkt ? 0 : AVERROR_EOF;
dp->dec.frames_decoded++;
// XXX the queue for transferring data to consumers 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(frame, &subtitle, 0);
if (ret < 0) {
avsubtitle_free(&subtitle);
return ret;
}
frame->width = dp->dec_ctx->width;
frame->height = dp->dec_ctx->height;
return process_subtitle(dp, frame);
}
static int packet_decode(DecoderPriv *dp, AVPacket *pkt, AVFrame *frame)
{
AVCodecContext *dec = dp->dec_ctx;
const char *type_desc = av_get_media_type_string(dec->codec_type);
int ret;
if (dec->codec_type == AVMEDIA_TYPE_SUBTITLE)
return transcode_subtitles(dp, pkt, frame);
// With fate-indeo3-2, we're getting 0-sized packets before EOF for some
// reason. This seems like a semi-critical bug. Don't trigger EOF, and
// skip the packet.
if (pkt && pkt->size == 0)
return 0;
if (pkt && (dp->flags & DECODER_FLAG_TS_UNRELIABLE)) {
pkt->pts = AV_NOPTS_VALUE;
pkt->dts = AV_NOPTS_VALUE;
}
if (pkt) {
FrameData *fd = packet_data(pkt);
if (!fd)
return AVERROR(ENOMEM);
fd->wallclock[LATENCY_PROBE_DEC_PRE] = av_gettime_relative();
}
ret = avcodec_send_packet(dec, pkt);
if (ret < 0 && !(ret == AVERROR_EOF && !pkt)) {
// In particular, we don't expect AVERROR(EAGAIN), because we read all
// decoded frames with avcodec_receive_frame() until done.
if (ret == AVERROR(EAGAIN)) {
av_log(dp, AV_LOG_FATAL, "A decoder returned an unexpected error code. "
"This is a bug, please report it.\n");
return AVERROR_BUG;
}
av_log(dp, AV_LOG_ERROR, "Error submitting %s to decoder: %s\n",
pkt ? "packet" : "EOF", av_err2str(ret));
if (ret != AVERROR_EOF) {
dp->dec.decode_errors++;
if (!exit_on_error)
ret = 0;
}
return ret;
}
while (1) {
FrameData *fd;
unsigned outputs_mask = 1;
av_frame_unref(frame);
update_benchmark(NULL);
ret = avcodec_receive_frame(dec, frame);
update_benchmark("decode_%s %s", type_desc, dp->parent_name);
if (ret == AVERROR(EAGAIN)) {
av_assert0(pkt); // should never happen during flushing
return 0;
} else if (ret == AVERROR_EOF) {
return ret;
} else if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Decoding error: %s\n", av_err2str(ret));
dp->dec.decode_errors++;
if (exit_on_error)
return ret;
continue;
}
if (frame->decode_error_flags || (frame->flags & AV_FRAME_FLAG_CORRUPT)) {
av_log(dp, exit_on_error ? AV_LOG_FATAL : AV_LOG_WARNING,
"corrupt decoded frame\n");
if (exit_on_error)
return AVERROR_INVALIDDATA;
}
fd = frame_data(frame);
if (!fd) {
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
fd->dec.pts = frame->pts;
fd->dec.tb = dec->pkt_timebase;
fd->dec.frame_num = dec->frame_num - 1;
fd->bits_per_raw_sample = dec->bits_per_raw_sample;
fd->wallclock[LATENCY_PROBE_DEC_POST] = av_gettime_relative();
frame->time_base = dec->pkt_timebase;
if (dec->codec_type == AVMEDIA_TYPE_AUDIO) {
dp->dec.samples_decoded += frame->nb_samples;
audio_ts_process(dp, frame);
} else {
ret = video_frame_process(dp, frame, &outputs_mask);
if (ret < 0) {
av_log(dp, AV_LOG_FATAL,
"Error while processing the decoded data\n");
return ret;
}
}
dp->dec.frames_decoded++;
for (int i = 0; i < stdc_count_ones(outputs_mask); i++) {
AVFrame *to_send = frame;
int pos;
av_assert0(outputs_mask);
pos = stdc_trailing_zeros(outputs_mask);
outputs_mask &= ~(1U << pos);
// this is not the last output and sch_dec_send() consumes the frame
// given to it, so make a temporary reference
if (outputs_mask) {
to_send = dp->frame_tmp_ref;
ret = av_frame_ref(to_send, frame);
if (ret < 0)
return ret;
}
ret = sch_dec_send(dp->sch, dp->sch_idx, pos, to_send);
if (ret < 0) {
av_frame_unref(to_send);
return ret == AVERROR_EOF ? AVERROR_EXIT : ret;
}
}
}
}
static int dec_open(DecoderPriv *dp, AVDictionary **dec_opts,
const DecoderOpts *o, AVFrame *param_out);
static int dec_standalone_open(DecoderPriv *dp, const AVPacket *pkt)
{
DecoderOpts o;
const FrameData *fd;
char name[16];
if (!pkt->opaque_ref)
return AVERROR_BUG;
fd = (FrameData *)pkt->opaque_ref->data;
if (!fd->par_enc)
return AVERROR_BUG;
memset(&o, 0, sizeof(o));
o.par = fd->par_enc;
o.time_base = pkt->time_base;
o.codec = dp->standalone_init.codec;
if (!o.codec)
o.codec = avcodec_find_decoder(o.par->codec_id);
if (!o.codec) {
const AVCodecDescriptor *desc = avcodec_descriptor_get(o.par->codec_id);
av_log(dp, AV_LOG_ERROR, "Cannot find a decoder for codec ID '%s'\n",
desc ? desc->name : "?");
return AVERROR_DECODER_NOT_FOUND;
}
snprintf(name, sizeof(name), "dec%d", dp->index);
o.name = name;
return dec_open(dp, &dp->standalone_init.opts, &o, NULL);
}
static void dec_thread_set_name(const DecoderPriv *dp)
{
char name[16] = "dec";
if (dp->index >= 0)
av_strlcatf(name, sizeof(name), "%d", dp->index);
else if (dp->parent_name)
av_strlcat(name, dp->parent_name, sizeof(name));
if (dp->dec_ctx)
av_strlcatf(name, sizeof(name), ":%s", dp->dec_ctx->codec->name);
ff_thread_setname(name);
}
static void dec_thread_uninit(DecThreadContext *dt)
{
av_packet_free(&dt->pkt);
av_frame_free(&dt->frame);
memset(dt, 0, sizeof(*dt));
}
static int dec_thread_init(DecThreadContext *dt)
{
memset(dt, 0, sizeof(*dt));
dt->frame = av_frame_alloc();
if (!dt->frame)
goto fail;
dt->pkt = av_packet_alloc();
if (!dt->pkt)
goto fail;
return 0;
fail:
dec_thread_uninit(dt);
return AVERROR(ENOMEM);
}
static int decoder_thread(void *arg)
{
DecoderPriv *dp = arg;
DecThreadContext dt;
int ret = 0, input_status = 0;
ret = dec_thread_init(&dt);
if (ret < 0)
goto finish;
dec_thread_set_name(dp);
while (!input_status) {
int flush_buffers, have_data;
input_status = sch_dec_receive(dp->sch, dp->sch_idx, dt.pkt);
have_data = input_status >= 0 &&
(dt.pkt->buf || dt.pkt->side_data_elems ||
(intptr_t)dt.pkt->opaque == PKT_OPAQUE_SUB_HEARTBEAT ||
(intptr_t)dt.pkt->opaque == PKT_OPAQUE_FIX_SUB_DURATION);
flush_buffers = input_status >= 0 && !have_data;
if (!have_data)
av_log(dp, AV_LOG_VERBOSE, "Decoder thread received %s packet\n",
flush_buffers ? "flush" : "EOF");
// this is a standalone decoder that has not been initialized yet
if (!dp->dec_ctx) {
if (flush_buffers)
continue;
if (input_status < 0) {
av_log(dp, AV_LOG_ERROR,
"Cannot initialize a standalone decoder\n");
ret = input_status;
goto finish;
}
ret = dec_standalone_open(dp, dt.pkt);
if (ret < 0)
goto finish;
}
ret = packet_decode(dp, have_data ? dt.pkt : NULL, dt.frame);
av_packet_unref(dt.pkt);
av_frame_unref(dt.frame);
// AVERROR_EOF - EOF from the decoder
// AVERROR_EXIT - EOF from the scheduler
// we treat them differently when flushing
if (ret == AVERROR_EXIT) {
ret = AVERROR_EOF;
flush_buffers = 0;
}
if (ret == AVERROR_EOF) {
av_log(dp, AV_LOG_VERBOSE, "Decoder returned EOF, %s\n",
flush_buffers ? "resetting" : "finishing");
if (!flush_buffers)
break;
/* report last frame duration to the scheduler */
if (dp->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
dt.pkt->pts = dp->last_frame_pts + dp->last_frame_duration_est;
dt.pkt->time_base = dp->last_frame_tb;
}
avcodec_flush_buffers(dp->dec_ctx);
} else if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Error processing packet in decoder: %s\n",
av_err2str(ret));
break;
}
}
// EOF is normal thread termination
if (ret == AVERROR_EOF)
ret = 0;
// on success send EOF timestamp to our downstreams
if (ret >= 0) {
float err_rate;
av_frame_unref(dt.frame);
dt.frame->opaque = (void*)(intptr_t)FRAME_OPAQUE_EOF;
dt.frame->pts = dp->last_frame_pts == AV_NOPTS_VALUE ? AV_NOPTS_VALUE :
dp->last_frame_pts + dp->last_frame_duration_est;
dt.frame->time_base = dp->last_frame_tb;
ret = sch_dec_send(dp->sch, dp->sch_idx, 0, dt.frame);
if (ret < 0 && ret != AVERROR_EOF) {
av_log(dp, AV_LOG_FATAL,
"Error signalling EOF timestamp: %s\n", av_err2str(ret));
goto finish;
}
ret = 0;
err_rate = (dp->dec.frames_decoded || dp->dec.decode_errors) ?
dp->dec.decode_errors / (dp->dec.frames_decoded + dp->dec.decode_errors) : 0.f;
if (err_rate > max_error_rate) {
av_log(dp, AV_LOG_FATAL, "Decode error rate %g exceeds maximum %g\n",
err_rate, max_error_rate);
ret = FFMPEG_ERROR_RATE_EXCEEDED;
} else if (err_rate)
av_log(dp, AV_LOG_VERBOSE, "Decode error rate %g\n", err_rate);
}
finish:
dec_thread_uninit(&dt);
return ret;
}
int dec_request_view(Decoder *d, const ViewSpecifier *vs,
SchedulerNode *src)
{
DecoderPriv *dp = dp_from_dec(d);
unsigned out_idx = 0;
int ret;
if (dp->multiview_user_config) {
if (!vs || vs->type == VIEW_SPECIFIER_TYPE_NONE) {
*src = SCH_DEC_OUT(dp->sch_idx, 0);
return 0;
}
av_log(dp, AV_LOG_ERROR,
"Manually selecting views with -view_ids cannot be combined "
"with view selection via stream specifiers. It is strongly "
"recommended you always use stream specifiers only.\n");
return AVERROR(EINVAL);
}
// when multiview_user_config is not set, NONE specifier is treated
// as requesting the base view
vs = (vs && vs->type != VIEW_SPECIFIER_TYPE_NONE) ? vs :
&(ViewSpecifier){ .type = VIEW_SPECIFIER_TYPE_IDX, .val = 0 };
// check if the specifier matches an already-existing one
for (int i = 0; i < dp->nb_views_requested; i++) {
const ViewSpecifier *vs1 = &dp->views_requested[i].vs;
if (vs->type == vs1->type &&
(vs->type == VIEW_SPECIFIER_TYPE_ALL || vs->val == vs1->val)) {
*src = SCH_DEC_OUT(dp->sch_idx, dp->views_requested[i].out_idx);
return 0;
}
}
// we use a bitmask to map view IDs to decoder outputs, which
// limits the number of outputs allowed
if (dp->nb_views_requested >= sizeof(dp->view_map[0].out_mask) * 8) {
av_log(dp, AV_LOG_ERROR, "Too many view specifiers\n");
return AVERROR(ENOSYS);
}
ret = GROW_ARRAY(dp->views_requested, dp->nb_views_requested);
if (ret < 0)
return ret;
if (dp->nb_views_requested > 1) {
ret = sch_add_dec_output(dp->sch, dp->sch_idx);
if (ret < 0)
return ret;
out_idx = ret;
}
dp->views_requested[dp->nb_views_requested - 1].out_idx = out_idx;
dp->views_requested[dp->nb_views_requested - 1].vs = *vs;
*src = SCH_DEC_OUT(dp->sch_idx,
dp->views_requested[dp->nb_views_requested - 1].out_idx);
return 0;
}
static int multiview_setup(DecoderPriv *dp, AVCodecContext *dec_ctx)
{
unsigned views_wanted = 0;
unsigned nb_view_ids_av, nb_view_ids;
unsigned *view_ids_av = NULL, *view_pos_av = NULL;
int *view_ids = NULL;
int ret;
// no views/only base view were requested - do nothing
if (!dp->nb_views_requested ||
(dp->nb_views_requested == 1 &&
dp->views_requested[0].vs.type == VIEW_SPECIFIER_TYPE_IDX &&
dp->views_requested[0].vs.val == 0))
return 0;
av_freep(&dp->view_map);
dp->nb_view_map = 0;
// retrieve views available in current CVS
ret = av_opt_get_array_size(dec_ctx, "view_ids_available",
AV_OPT_SEARCH_CHILDREN, &nb_view_ids_av);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR,
"Multiview decoding requested, but decoder '%s' does not "
"support it\n", dec_ctx->codec->name);
return AVERROR(ENOSYS);
}
if (nb_view_ids_av) {
unsigned nb_view_pos_av;
if (nb_view_ids_av >= sizeof(views_wanted) * 8) {
av_log(dp, AV_LOG_ERROR, "Too many views in video: %u\n", nb_view_ids_av);
ret = AVERROR(ENOSYS);
goto fail;
}
view_ids_av = av_calloc(nb_view_ids_av, sizeof(*view_ids_av));
if (!view_ids_av) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = av_opt_get_array(dec_ctx, "view_ids_available",
AV_OPT_SEARCH_CHILDREN, 0, nb_view_ids_av,
AV_OPT_TYPE_UINT, view_ids_av);
if (ret < 0)
goto fail;
ret = av_opt_get_array_size(dec_ctx, "view_pos_available",
AV_OPT_SEARCH_CHILDREN, &nb_view_pos_av);
if (ret >= 0 && nb_view_pos_av == nb_view_ids_av) {
view_pos_av = av_calloc(nb_view_ids_av, sizeof(*view_pos_av));
if (!view_pos_av) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = av_opt_get_array(dec_ctx, "view_pos_available",
AV_OPT_SEARCH_CHILDREN, 0, nb_view_ids_av,
AV_OPT_TYPE_UINT, view_pos_av);
if (ret < 0)
goto fail;
}
} else {
// assume there is a single view with ID=0
nb_view_ids_av = 1;
view_ids_av = av_calloc(nb_view_ids_av, sizeof(*view_ids_av));
view_pos_av = av_calloc(nb_view_ids_av, sizeof(*view_pos_av));
if (!view_ids_av || !view_pos_av) {
ret = AVERROR(ENOMEM);
goto fail;
}
view_pos_av[0] = AV_STEREO3D_VIEW_UNSPEC;
}
dp->view_map = av_calloc(nb_view_ids_av, sizeof(*dp->view_map));
if (!dp->view_map) {
ret = AVERROR(ENOMEM);
goto fail;
}
dp->nb_view_map = nb_view_ids_av;
for (int i = 0; i < dp->nb_view_map; i++)
dp->view_map[i].id = view_ids_av[i];
// figure out which views should go to which output
for (int i = 0; i < dp->nb_views_requested; i++) {
const ViewSpecifier *vs = &dp->views_requested[i].vs;
switch (vs->type) {
case VIEW_SPECIFIER_TYPE_IDX:
if (vs->val >= nb_view_ids_av) {
av_log(dp, exit_on_error ? AV_LOG_ERROR : AV_LOG_WARNING,
"View with index %u requested, but only %u views available "
"in current video sequence (more views may or may not be "
"available in later sequences).\n",
vs->val, nb_view_ids_av);
if (exit_on_error) {
ret = AVERROR(EINVAL);
goto fail;
}
continue;
}
views_wanted |= 1U << vs->val;
dp->view_map[vs->val].out_mask |= 1ULL << i;
break;
case VIEW_SPECIFIER_TYPE_ID: {
int view_idx = -1;
for (unsigned j = 0; j < nb_view_ids_av; j++) {
if (view_ids_av[j] == vs->val) {
view_idx = j;
break;
}
}
if (view_idx < 0) {
av_log(dp, exit_on_error ? AV_LOG_ERROR : AV_LOG_WARNING,
"View with ID %u requested, but is not available "
"in the video sequence\n", vs->val);
if (exit_on_error) {
ret = AVERROR(EINVAL);
goto fail;
}
continue;
}
views_wanted |= 1U << view_idx;
dp->view_map[view_idx].out_mask |= 1ULL << i;
break;
}
case VIEW_SPECIFIER_TYPE_POS: {
int view_idx = -1;
for (unsigned j = 0; view_pos_av && j < nb_view_ids_av; j++) {
if (view_pos_av[j] == vs->val) {
view_idx = j;
break;
}
}
if (view_idx < 0) {
av_log(dp, exit_on_error ? AV_LOG_ERROR : AV_LOG_WARNING,
"View position '%s' requested, but is not available "
"in the video sequence\n", av_stereo3d_view_name(vs->val));
if (exit_on_error) {
ret = AVERROR(EINVAL);
goto fail;
}
continue;
}
views_wanted |= 1U << view_idx;
dp->view_map[view_idx].out_mask |= 1ULL << i;
break;
}
case VIEW_SPECIFIER_TYPE_ALL:
views_wanted |= (1U << nb_view_ids_av) - 1;
for (int j = 0; j < dp->nb_view_map; j++)
dp->view_map[j].out_mask |= 1ULL << i;
break;
}
}
if (!views_wanted) {
av_log(dp, AV_LOG_ERROR, "No views were selected for decoding\n");
ret = AVERROR(EINVAL);
goto fail;
}
// signal to decoder which views we want
nb_view_ids = stdc_count_ones(views_wanted);
view_ids = av_malloc_array(nb_view_ids, sizeof(*view_ids));
if (!view_ids) {
ret = AVERROR(ENOMEM);
goto fail;
}
for (unsigned i = 0; i < nb_view_ids; i++) {
int pos;
av_assert0(views_wanted);
pos = stdc_trailing_zeros(views_wanted);
views_wanted &= ~(1U << pos);
view_ids[i] = view_ids_av[pos];
}
// unset view_ids in case we set it earlier
av_opt_set(dec_ctx, "view_ids", NULL, AV_OPT_SEARCH_CHILDREN);
ret = av_opt_set_array(dec_ctx, "view_ids", AV_OPT_SEARCH_CHILDREN,
0, nb_view_ids, AV_OPT_TYPE_INT, view_ids);
if (ret < 0)
goto fail;
if (!dp->frame_tmp_ref) {
dp->frame_tmp_ref = av_frame_alloc();
if (!dp->frame_tmp_ref) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
fail:
av_freep(&view_ids_av);
av_freep(&view_pos_av);
av_freep(&view_ids);
return ret;
}
static void multiview_check_manual(DecoderPriv *dp, const AVDictionary *dec_opts)
{
if (av_dict_get(dec_opts, "view_ids", NULL, 0)) {
av_log(dp, AV_LOG_WARNING, "Manually selecting views with -view_ids "
"is not recommended, use view specifiers instead\n");
dp->multiview_user_config = 1;
}
}
static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
{
DecoderPriv *dp = s->opaque;
const enum AVPixelFormat *p;
int ret;
ret = multiview_setup(dp, s);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Error setting up multiview decoding: %s\n",
av_err2str(ret));
return AV_PIX_FMT_NONE;
}
for (p = pix_fmts; *p != AV_PIX_FMT_NONE; p++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
const AVCodecHWConfig *config = NULL;
if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
break;
if (dp->hwaccel_id == HWACCEL_GENERIC ||
dp->hwaccel_id == HWACCEL_AUTO) {
for (int i = 0;; i++) {
config = avcodec_get_hw_config(s->codec, i);
if (!config)
break;
if (!(config->methods &
AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
continue;
if (config->pix_fmt == *p)
break;
}
}
if (config && config->device_type == dp->hwaccel_device_type) {
dp->hwaccel_pix_fmt = *p;
break;
}
}
return *p;
}
static int get_buffer(AVCodecContext *dec_ctx, AVFrame *frame, int flags)
{
DecoderPriv *dp = dec_ctx->opaque;
// for multiview video, store the output mask in frame opaque
if (dp->nb_view_map) {
const AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIEW_ID);
int view_id = sd ? *(int*)sd->data : 0;
for (int i = 0; i < dp->nb_view_map; i++) {
if (dp->view_map[i].id == view_id) {
frame->opaque = (void*)dp->view_map[i].out_mask;
break;
}
}
}
return avcodec_default_get_buffer2(dec_ctx, frame, flags);
}
static HWDevice *hw_device_match_by_codec(const AVCodec *codec)
{
const AVCodecHWConfig *config;
HWDevice *dev;
for (int i = 0;; i++) {
config = avcodec_get_hw_config(codec, i);
if (!config)
return NULL;
if (!(config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
continue;
dev = hw_device_get_by_type(config->device_type);
if (dev)
return dev;
}
}
static int hw_device_setup_for_decode(DecoderPriv *dp,
const AVCodec *codec,
const char *hwaccel_device)
{
const AVCodecHWConfig *config;
enum AVHWDeviceType type;
HWDevice *dev = NULL;
int err, auto_device = 0;
if (hwaccel_device) {
dev = hw_device_get_by_name(hwaccel_device);
if (!dev) {
if (dp->hwaccel_id == HWACCEL_AUTO) {
auto_device = 1;
} else if (dp->hwaccel_id == HWACCEL_GENERIC) {
type = dp->hwaccel_device_type;
err = hw_device_init_from_type(type, hwaccel_device,
&dev);
} else {
// This will be dealt with by API-specific initialisation
// (using hwaccel_device), so nothing further needed here.
return 0;
}
} else {
if (dp->hwaccel_id == HWACCEL_AUTO) {
dp->hwaccel_device_type = dev->type;
} else if (dp->hwaccel_device_type != dev->type) {
av_log(dp, AV_LOG_ERROR, "Invalid hwaccel device "
"specified for decoder: device %s of type %s is not "
"usable with hwaccel %s.\n", dev->name,
av_hwdevice_get_type_name(dev->type),
av_hwdevice_get_type_name(dp->hwaccel_device_type));
return AVERROR(EINVAL);
}
}
} else {
if (dp->hwaccel_id == HWACCEL_AUTO) {
auto_device = 1;
} else if (dp->hwaccel_id == HWACCEL_GENERIC) {
type = dp->hwaccel_device_type;
dev = hw_device_get_by_type(type);
// When "-qsv_device device" is used, an internal QSV device named
// as "__qsv_device" is created. Another QSV device is created too
// if "-init_hw_device qsv=name:device" is used. There are 2 QSV devices
// if both "-qsv_device device" and "-init_hw_device qsv=name:device"
// are used, hw_device_get_by_type(AV_HWDEVICE_TYPE_QSV) returns NULL.
// To keep back-compatibility with the removed ad-hoc libmfx setup code,
// call hw_device_get_by_name("__qsv_device") to select the internal QSV
// device.
if (!dev && type == AV_HWDEVICE_TYPE_QSV)
dev = hw_device_get_by_name("__qsv_device");
if (!dev)
err = hw_device_init_from_type(type, NULL, &dev);
} else {
dev = hw_device_match_by_codec(codec);
if (!dev) {
// No device for this codec, but not using generic hwaccel
// and therefore may well not need one - ignore.
return 0;
}
}
}
if (auto_device) {
if (!avcodec_get_hw_config(codec, 0)) {
// Decoder does not support any hardware devices.
return 0;
}
for (int i = 0; !dev; i++) {
config = avcodec_get_hw_config(codec, i);
if (!config)
break;
type = config->device_type;
dev = hw_device_get_by_type(type);
if (dev) {
av_log(dp, AV_LOG_INFO, "Using auto "
"hwaccel type %s with existing device %s.\n",
av_hwdevice_get_type_name(type), dev->name);
}
}
for (int i = 0; !dev; i++) {
config = avcodec_get_hw_config(codec, i);
if (!config)
break;
type = config->device_type;
// Try to make a new device of this type.
err = hw_device_init_from_type(type, hwaccel_device,
&dev);
if (err < 0) {
// Can't make a device of this type.
continue;
}
if (hwaccel_device) {
av_log(dp, AV_LOG_INFO, "Using auto "
"hwaccel type %s with new device created "
"from %s.\n", av_hwdevice_get_type_name(type),
hwaccel_device);
} else {
av_log(dp, AV_LOG_INFO, "Using auto "
"hwaccel type %s with new default device.\n",
av_hwdevice_get_type_name(type));
}
}
if (dev) {
dp->hwaccel_device_type = type;
} else {
av_log(dp, AV_LOG_INFO, "Auto hwaccel "
"disabled: no device found.\n");
dp->hwaccel_id = HWACCEL_NONE;
return 0;
}
}
if (!dev) {
av_log(dp, AV_LOG_ERROR, "No device available "
"for decoder: device type %s needed for codec %s.\n",
av_hwdevice_get_type_name(type), codec->name);
return err;
}
dp->dec_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
if (!dp->dec_ctx->hw_device_ctx)
return AVERROR(ENOMEM);
return 0;
}
static int dec_open(DecoderPriv *dp, AVDictionary **dec_opts,
const DecoderOpts *o, AVFrame *param_out)
{
const AVCodec *codec = o->codec;
int ret;
dp->flags = o->flags;
dp->log_parent = o->log_parent;
dp->dec.type = codec->type;
dp->framerate_in = o->framerate;
dp->hwaccel_id = o->hwaccel_id;
dp->hwaccel_device_type = o->hwaccel_device_type;
dp->hwaccel_output_format = o->hwaccel_output_format;
snprintf(dp->log_name, sizeof(dp->log_name), "dec:%s", codec->name);
dp->parent_name = av_strdup(o->name ? o->name : "");
if (!dp->parent_name)
return AVERROR(ENOMEM);
if (codec->type == AVMEDIA_TYPE_SUBTITLE &&
(dp->flags & DECODER_FLAG_FIX_SUB_DURATION)) {
for (int i = 0; i < FF_ARRAY_ELEMS(dp->sub_prev); i++) {
dp->sub_prev[i] = av_frame_alloc();
if (!dp->sub_prev[i])
return AVERROR(ENOMEM);
}
dp->sub_heartbeat = av_frame_alloc();
if (!dp->sub_heartbeat)
return AVERROR(ENOMEM);
}
dp->sar_override = o->par->sample_aspect_ratio;
dp->dec_ctx = avcodec_alloc_context3(codec);
if (!dp->dec_ctx)
return AVERROR(ENOMEM);
ret = avcodec_parameters_to_context(dp->dec_ctx, o->par);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Error initializing the decoder context.\n");
return ret;
}
dp->dec_ctx->opaque = dp;
dp->dec_ctx->get_format = get_format;
dp->dec_ctx->get_buffer2 = get_buffer;
dp->dec_ctx->pkt_timebase = o->time_base;
if (!av_dict_get(*dec_opts, "threads", NULL, 0))
av_dict_set(dec_opts, "threads", "auto", 0);
ret = hw_device_setup_for_decode(dp, codec, o->hwaccel_device);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR,
"Hardware device setup failed for decoder: %s\n",
av_err2str(ret));
return ret;
}
ret = av_opt_set_dict2(dp->dec_ctx, dec_opts, AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(dp, AV_LOG_ERROR, "Error applying decoder options: %s\n",
av_err2str(ret));
return ret;
}
ret = check_avoptions(*dec_opts);
if (ret < 0)
return ret;
dp->dec_ctx->flags |= AV_CODEC_FLAG_COPY_OPAQUE;
if (o->flags & DECODER_FLAG_BITEXACT)
dp->dec_ctx->flags |= AV_CODEC_FLAG_BITEXACT;
// we apply cropping outselves
dp->apply_cropping = dp->dec_ctx->apply_cropping;
dp->dec_ctx->apply_cropping = 0;
if ((ret = avcodec_open2(dp->dec_ctx, codec, NULL)) < 0) {
av_log(dp, AV_LOG_ERROR, "Error while opening decoder: %s\n",
av_err2str(ret));
return ret;
}
if (dp->dec_ctx->hw_device_ctx) {
// Update decoder extra_hw_frames option to account for the
// frames held in queues inside the ffmpeg utility. This is
// called after avcodec_open2() because the user-set value of
// extra_hw_frames becomes valid in there, and we need to add
// this on top of it.
int extra_frames = DEFAULT_FRAME_THREAD_QUEUE_SIZE;
if (dp->dec_ctx->extra_hw_frames >= 0)
dp->dec_ctx->extra_hw_frames += extra_frames;
else
dp->dec_ctx->extra_hw_frames = extra_frames;
}
dp->dec.subtitle_header = dp->dec_ctx->subtitle_header;
dp->dec.subtitle_header_size = dp->dec_ctx->subtitle_header_size;
if (param_out) {
if (dp->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
param_out->format = dp->dec_ctx->sample_fmt;
param_out->sample_rate = dp->dec_ctx->sample_rate;
ret = av_channel_layout_copy(&param_out->ch_layout, &dp->dec_ctx->ch_layout);
if (ret < 0)
return ret;
} else if (dp->dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
param_out->format = dp->dec_ctx->pix_fmt;
param_out->width = dp->dec_ctx->width;
param_out->height = dp->dec_ctx->height;
param_out->sample_aspect_ratio = dp->dec_ctx->sample_aspect_ratio;
param_out->colorspace = dp->dec_ctx->colorspace;
param_out->color_range = dp->dec_ctx->color_range;
}
param_out->time_base = dp->dec_ctx->pkt_timebase;
}
return 0;
}
int dec_init(Decoder **pdec, Scheduler *sch,
AVDictionary **dec_opts, const DecoderOpts *o,
AVFrame *param_out)
{
DecoderPriv *dp;
int ret;
*pdec = NULL;
ret = dec_alloc(&dp, sch, !!(o->flags & DECODER_FLAG_SEND_END_TS));
if (ret < 0)
return ret;
multiview_check_manual(dp, *dec_opts);
ret = dec_open(dp, dec_opts, o, param_out);
if (ret < 0)
goto fail;
*pdec = &dp->dec;
return dp->sch_idx;
fail:
dec_free((Decoder**)&dp);
return ret;
}
int dec_create(const OptionsContext *o, const char *arg, Scheduler *sch)
{
DecoderPriv *dp;
OutputFile *of;
OutputStream *ost;
int of_index, ost_index;
char *p;
unsigned enc_idx;
int ret;
ret = dec_alloc(&dp, sch, 0);
if (ret < 0)
return ret;
dp->index = nb_decoders;
ret = GROW_ARRAY(decoders, nb_decoders);
if (ret < 0) {
dec_free((Decoder **)&dp);
return ret;
}
decoders[nb_decoders - 1] = (Decoder *)dp;
of_index = strtol(arg, &p, 0);
if (of_index < 0 || of_index >= nb_output_files) {
av_log(dp, AV_LOG_ERROR, "Invalid output file index '%d' in %s\n", of_index, arg);
return AVERROR(EINVAL);
}
of = output_files[of_index];
ost_index = strtol(p + 1, NULL, 0);
if (ost_index < 0 || ost_index >= of->nb_streams) {
av_log(dp, AV_LOG_ERROR, "Invalid output stream index '%d' in %s\n", ost_index, arg);
return AVERROR(EINVAL);
}
ost = of->streams[ost_index];
if (!ost->enc) {
av_log(dp, AV_LOG_ERROR, "Output stream %s has no encoder\n", arg);
return AVERROR(EINVAL);
}
dp->dec.type = ost->type;
ret = enc_loopback(ost->enc);
if (ret < 0)
return ret;
enc_idx = ret;
ret = sch_connect(sch, SCH_ENC(enc_idx), SCH_DEC_IN(dp->sch_idx));
if (ret < 0)
return ret;
ret = av_dict_copy(&dp->standalone_init.opts, o->g->codec_opts, 0);
if (ret < 0)
return ret;
multiview_check_manual(dp, dp->standalone_init.opts);
if (o->codec_names.nb_opt) {
const char *name = o->codec_names.opt[o->codec_names.nb_opt - 1].u.str;
dp->standalone_init.codec = avcodec_find_decoder_by_name(name);
if (!dp->standalone_init.codec) {
av_log(dp, AV_LOG_ERROR, "No such decoder: %s\n", name);
return AVERROR_DECODER_NOT_FOUND;
}
}
return 0;
}
int dec_filter_add(Decoder *d, InputFilter *ifilter, InputFilterOptions *opts,
const ViewSpecifier *vs, SchedulerNode *src)
{
DecoderPriv *dp = dp_from_dec(d);
char name[16];
snprintf(name, sizeof(name), "dec%d", dp->index);
opts->name = av_strdup(name);
if (!opts->name)
return AVERROR(ENOMEM);
return dec_request_view(d, vs, src);
}
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