bool CDVDVideoCodecDRMPRIME::AddData(const DemuxPacket& packet)
{
if (!m_pCodecContext)
return true;
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = packet.pData;
avpkt.size = packet.iSize;
avpkt.dts = (packet.dts == DVD_NOPTS_VALUE) ? AV_NOPTS_VALUE : static_cast<int64_t>(packet.dts / DVD_TIME_BASE * AV_TIME_BASE);
avpkt.pts = (packet.pts == DVD_NOPTS_VALUE) ? AV_NOPTS_VALUE : static_cast<int64_t>(packet.pts / DVD_TIME_BASE * AV_TIME_BASE);
avpkt.side_data = static_cast<AVPacketSideData*>(packet.pSideData);
avpkt.side_data_elems = packet.iSideDataElems;
int ret = avcodec_send_packet(m_pCodecContext, &avpkt);
if (ret == AVERROR(EAGAIN))
return false;
else if (ret == AVERROR_EOF)
return true;
else if (ret)
{
CLog::Log(LOGERROR, "CDVDVideoCodecDRMPRIME::%s - send packet failed, ret:%d", __FUNCTION__, ret);
return false;
}
return true;
}
static void decode(AVCodecContext *dec_ctx, AVFrame *frame, AVPacket *pkt,
const char *filename)
{
char buf[1024];
int ret;
ret = avcodec_send_packet(dec_ctx, pkt);
if (ret < 0) {
fprintf(stderr, "Error sending a packet for decoding\n");
exit(1);
}
while (ret >= 0) {
ret = avcodec_receive_frame(dec_ctx, frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return;
else if (ret < 0) {
fprintf(stderr, "Error during decoding\n");
exit(1);
}
printf("saving frame %3d\n", dec_ctx->frame_number);
fflush(stdout);
/* the picture is allocated by the decoder. no need to
free it */
snprintf(buf, sizeof(buf), filename, dec_ctx->frame_number);
pgm_save(frame->data[0], frame->linesize[0],
frame->width, frame->height, buf);
}
}
/**
* 解码
* @param pCodecCtx
* @param pAvPacket
* @param pFrame
* @return
*/
int MP4Decoder::DecodePacket(AVCodecContext *pCodecCtx, AVPacket *pAvPacket, AVFrame *pFrame) {
int result = avcodec_send_packet(pCodecCtx, pAvPacket);
if (result < 0) {
LOGE("send packet for decoding failed");
return -1;
}
while (!result) {
result = avcodec_receive_frame(pCodecCtx, pFrame);
if (result == AVERROR(EAGAIN) || result == AVERROR_EOF) {
return 0;
} else if (result < 0) {
LOGE("error during encoding %d", result);
return -1;
}
sws_scale(pSwsContext,
(const uint8_t *const *) pFrame->data,
pFrame->linesize,
0,
pCodecCtx->height,
pFrameYUV->data,
pFrameYUV->linesize);
int y_size = pCodecCtx->width * pCodecCtx->height;
fwrite(pFrameYUV->data[0], 1, y_size, yuv_file); //Y
fwrite(pFrameYUV->data[1], 1, y_size / 4, yuv_file); //U
fwrite(pFrameYUV->data[2], 1, y_size / 4, yuv_file); //V
av_frame_unref(pFrame);
}
return 0;
}
AudioPlayerLoader::ReadResult ChildFFMpegLoader::readMore(QByteArray &result, int64 &samplesAdded) {
int res;
av_frame_unref(_frame);
res = avcodec_receive_frame(_parentData->context, _frame);
if (res >= 0) {
return readFromReadyFrame(result, samplesAdded);
}
if (res == AVERROR_EOF) {
return ReadResult::EndOfFile;
} else if (res != AVERROR(EAGAIN)) {
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to avcodec_receive_frame() file '%1', data size '%2', error %3, %4").arg(file.name()).arg(data.size()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return ReadResult::Error;
}
if (_queue.isEmpty()) {
return _eofReached ? ReadResult::EndOfFile : ReadResult::Wait;
}
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, _queue.dequeue());
_eofReached = FFMpeg::isNullPacket(packet);
if (_eofReached) {
avcodec_send_packet(_parentData->context, nullptr); // drain
return ReadResult::Ok;
}
res = avcodec_send_packet(_parentData->context, &packet);
if (res < 0) {
FFMpeg::freePacket(&packet);
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to avcodec_send_packet() file '%1', data size '%2', error %3, %4").arg(file.name()).arg(data.size()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
// There is a sample voice message where skipping such packet
// results in a crash (read_access to nullptr) in swr_convert().
//if (res == AVERROR_INVALIDDATA) {
// return ReadResult::NotYet; // try to skip bad packet
//}
return ReadResult::Error;
}
FFMpeg::freePacket(&packet);
return ReadResult::Ok;
}
void CDVDVideoCodecDRMPRIME::Drain()
{
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = nullptr;
avpkt.size = 0;
avcodec_send_packet(m_pCodecContext, &avpkt);
}
AudioPlayerLoader::ReadResult FFMpegLoader::readMore(QByteArray &result, int64 &samplesAdded) {
int res;
av_frame_unref(frame);
res = avcodec_receive_frame(codecContext, frame);
if (res >= 0) {
return readFromReadyFrame(result, samplesAdded);
}
if (res == AVERROR_EOF) {
return ReadResult::EndOfFile;
} else if (res != AVERROR(EAGAIN)) {
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to avcodec_receive_frame() file '%1', data size '%2', error %3, %4").arg(_file.name()).arg(_data.size()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return ReadResult::Error;
}
if ((res = av_read_frame(fmtContext, &avpkt)) < 0) {
if (res != AVERROR_EOF) {
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to av_read_frame() file '%1', data size '%2', error %3, %4").arg(_file.name()).arg(_data.size()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return ReadResult::Error;
}
avcodec_send_packet(codecContext, nullptr); // drain
return ReadResult::Ok;
}
if (avpkt.stream_index == streamId) {
res = avcodec_send_packet(codecContext, &avpkt);
if (res < 0) {
av_packet_unref(&avpkt);
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to avcodec_send_packet() file '%1', data size '%2', error %3, %4").arg(_file.name()).arg(_data.size()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
// There is a sample voice message where skipping such packet
// results in a crash (read_access to nullptr) in swr_convert().
//if (res == AVERROR_INVALIDDATA) {
// return ReadResult::NotYet; // try to skip bad packet
//}
return ReadResult::Error;
}
}
av_packet_unref(&avpkt);
return ReadResult::Ok;
}
bool CDVDVideoCodecFFmpeg::AddData(const DemuxPacket &packet)
{
if (!m_pCodecContext)
return true;
if (!packet.pData)
return true;
if (m_eof)
{
Reset();
}
if (packet.recoveryPoint)
m_started = true;
m_dts = packet.dts;
m_pCodecContext->reordered_opaque = pts_dtoi(packet.pts);
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = packet.pData;
avpkt.size = packet.iSize;
avpkt.dts = (packet.dts == DVD_NOPTS_VALUE) ? AV_NOPTS_VALUE : static_cast<int64_t>(packet.dts / DVD_TIME_BASE * AV_TIME_BASE);
avpkt.pts = (packet.pts == DVD_NOPTS_VALUE) ? AV_NOPTS_VALUE : static_cast<int64_t>(packet.pts / DVD_TIME_BASE * AV_TIME_BASE);
avpkt.side_data = static_cast<AVPacketSideData*>(packet.pSideData);
avpkt.side_data_elems = packet.iSideDataElems;
int ret = avcodec_send_packet(m_pCodecContext, &avpkt);
// try again
if (ret == AVERROR(EAGAIN))
{
return false;
}
// error
else if (ret)
{
// handle VC_NOBUFFER error for hw accel
if (m_pHardware)
{
int result = m_pHardware->Check(m_pCodecContext);
if (result == VC_NOBUFFER)
{
return false;
}
}
}
m_iLastKeyframe++;
// put a limit on convergence count to avoid huge mem usage on streams without keyframes
if (m_iLastKeyframe > 300)
m_iLastKeyframe = 300;
return true;
}
bool ffmpeg_decode_audio(struct ffmpeg_decode *decode,
uint8_t *data, size_t size,
struct obs_source_audio *audio,
bool *got_output)
{
AVPacket packet = {0};
int got_frame = false;
int ret = 0;
*got_output = false;
copy_data(decode, data, size);
av_init_packet(&packet);
packet.data = decode->packet_buffer;
packet.size = (int)size;
if (!decode->frame) {
decode->frame = av_frame_alloc();
if (!decode->frame)
return false;
}
if (data && size)
ret = avcodec_send_packet(decode->decoder, &packet);
if (ret == 0)
ret = avcodec_receive_frame(decode->decoder, decode->frame);
got_frame = (ret == 0);
if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
ret = 0;
if (ret < 0)
return false;
else if (!got_frame)
return true;
for (size_t i = 0; i < MAX_AV_PLANES; i++)
audio->data[i] = decode->frame->data[i];
audio->samples_per_sec = decode->frame->sample_rate;
audio->format = convert_sample_format(decode->frame->format);
audio->speakers =
convert_speaker_layout((uint8_t)decode->decoder->channels);
audio->frames = decode->frame->nb_samples;
if (audio->format == AUDIO_FORMAT_UNKNOWN)
return false;
*got_output = true;
return true;
}
struct mp_image *load_image_png_buf(void *buffer, size_t buffer_size, int imgfmt)
{
const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_PNG);
if (!codec)
return NULL;
AVCodecContext *avctx = avcodec_alloc_context3(codec);
if (!avctx)
return NULL;
if (avcodec_open2(avctx, codec, NULL) < 0) {
avcodec_free_context(&avctx);
return NULL;
}
AVPacket *pkt = av_packet_alloc();
if (pkt) {
if (av_new_packet(pkt, buffer_size) >= 0)
memcpy(pkt->data, buffer, buffer_size);
}
// (There is only 1 outcome: either it takes it and decodes it, or not.)
avcodec_send_packet(avctx, pkt);
avcodec_send_packet(avctx, NULL);
av_packet_free(&pkt);
struct mp_image *res = NULL;
AVFrame *frame = av_frame_alloc();
if (frame && avcodec_receive_frame(avctx, frame) >= 0) {
struct mp_image *r = mp_image_from_av_frame(frame);
if (r)
res = convert_image(r, imgfmt, mp_null_log);
talloc_free(r);
}
av_frame_free(&frame);
avcodec_free_context(&avctx);
return res;
}
int COMXAudioCodecOMX::Decode(BYTE* pData, int iSize, double dts, double pts)
{
int iBytesUsed = iSize, got_frame = 0;
if (!m_pCodecContext) return -1;
AVPacket avpkt;
if (m_bGotFrame)
return 0;
av_init_packet(&avpkt);
avpkt.data = pData;
avpkt.size = iSize;
// iBytesUsed = avcodec_decode_audio4( m_pCodecContext
// , m_pFrame1
// , &got_frame
// , &avpkt);
avcodec_send_packet(m_pCodecContext, &avpkt);
got_frame = avcodec_receive_frame(m_pCodecContext, m_pFrame1) == 0;
if (/*iBytesUsed < 0 ||*/ !got_frame)
{
return iBytesUsed;
}
/* some codecs will attempt to consume more data than what we gave */
if (iBytesUsed > iSize)
{
LOG_WARNING << "COMXAudioCodecOMX::Decode - decoder attempted to consume more data than given";
iBytesUsed = iSize;
}
m_bGotFrame = true;
if (m_bFirstFrame)
{
char log_buf[512];
sprintf(log_buf, "COMXAudioCodecOMX::Decode(%p,%d) format=%d(%d) chan=%d samples=%d size=%d data=%p,%p,%p,%p,%p,%p,%p,%p",
pData, iSize, m_pCodecContext->sample_fmt, m_desiredSampleFormat,
m_pCodecContext->channels, m_pFrame1->nb_samples, m_pFrame1->linesize[0],
m_pFrame1->data[0], m_pFrame1->data[1], m_pFrame1->data[2], m_pFrame1->data[3],
m_pFrame1->data[4], m_pFrame1->data[5], m_pFrame1->data[6], m_pFrame1->data[7]
);
LOG_TRACE_2 << log_buf;
}
if (!m_iBufferOutputUsed)
{
m_dts = dts;
m_pts = pts;
}
return iBytesUsed;
}
static int avcodec_decoder_decode_packet(const avcodec_decoder d, opencv_mat mat, AVPacket *packet) {
int res = avcodec_send_packet(d->codec, packet);
if (res < 0) {
return res;
}
AVFrame *frame = av_frame_alloc();
if (!frame) {
return -1;
}
res = avcodec_decoder_copy_frame(d, mat, frame);
av_frame_free(&frame);
return res;
}
static int decode_packet(struct mp_decode *d, int *got_frame)
{
int ret;
*got_frame = 0;
#ifdef USE_NEW_FFMPEG_DECODE_API
ret = avcodec_receive_frame(d->decoder, d->frame);
if (ret != 0 && ret != AVERROR(EAGAIN)) {
if (ret == AVERROR_EOF)
ret = 0;
return ret;
}
if (ret != 0) {
ret = avcodec_send_packet(d->decoder, &d->pkt);
if (ret != 0 && ret != AVERROR(EAGAIN)) {
if (ret == AVERROR_EOF)
ret = 0;
return ret;
}
ret = avcodec_receive_frame(d->decoder, d->frame);
if (ret != 0 && ret != AVERROR(EAGAIN)) {
if (ret == AVERROR_EOF)
ret = 0;
return ret;
}
*got_frame = (ret == 0);
ret = d->pkt.size;
} else {
ret = 0;
*got_frame = 1;
}
#else
if (d->audio) {
ret = avcodec_decode_audio4(d->decoder,
d->frame, got_frame, &d->pkt);
} else {
ret = avcodec_decode_video2(d->decoder,
d->frame, got_frame, &d->pkt);
}
#endif
return ret;
}
static int determine_codec_profile(struct dec_audio *da, AVPacket *pkt)
{
struct spdifContext *spdif_ctx = da->priv;
int profile = FF_PROFILE_UNKNOWN;
AVCodecContext *ctx = NULL;
AVFrame *frame = NULL;
AVCodec *codec = avcodec_find_decoder(spdif_ctx->codec_id);
if (!codec)
goto done;
frame = av_frame_alloc();
if (!frame)
goto done;
ctx = avcodec_alloc_context3(codec);
if (!ctx)
goto done;
if (avcodec_open2(ctx, codec, NULL) < 0) {
av_free(ctx); // don't attempt to avcodec_close() an unopened ctx
ctx = NULL;
goto done;
}
if (avcodec_send_packet(ctx, pkt) < 0)
goto done;
if (avcodec_receive_frame(ctx, frame) < 0)
goto done;
profile = ctx->profile;
done:
av_frame_free(&frame);
if (ctx)
avcodec_close(ctx);
avcodec_free_context(&ctx);
if (profile == FF_PROFILE_UNKNOWN)
MP_WARN(da, "Failed to parse codec profile.\n");
return profile;
}
int VideoStream::readPacket() {
// https://www.ffmpeg.org/doxygen/trunk/group__lavf__decoding.html#details
// Read the next avFrame from file and fill packet with compressed data
// If pkt->buf is NULL, then the packet is valid until the next av_read_frame() or until avformat_close_input().
// Otherwise the packet is valid indefinitely.In both cases the packet must be freed with av_packet_unref when it is no longer needed.
int ret = av_read_frame(avFormatContext.get(), pkt.get());
if (ret < 0) {
cout << "Error or end of file." << endl;
eof = true;
}
else {
// Send packet to decoder
ret = avcodec_send_packet(avCodecContext.get(), pkt.get());
assert(ret == 0);
}
return ret;
}
int movie_player::get_frame(int stream, AVFrame* pFrame)
{
int iError = AVERROR(EAGAIN);
AVCodecContext* ctx;
av_packet_queue* pq;
if (stream == video_stream_index)
{
ctx = video_codec_context;
pq = video_queue;
}
else if (stream == audio_stream_index)
{
ctx = audio_codec_context;
pq = audio_queue;
}
else
{
throw std::invalid_argument("Invalid value provided for stream");
}
while (iError == AVERROR(EAGAIN))
{
iError = avcodec_receive_frame(ctx, pFrame);
if (iError == AVERROR(EAGAIN))
{
AVPacket* pkt = pq->pull(true);
int res = avcodec_send_packet(ctx, pkt);
if (pkt != nullptr) {
av_packet_unref(pkt);
av_free(pkt);
}
if (res == AVERROR(EAGAIN))
{
throw std::runtime_error("avcodec_receive_frame and avcodec_send_packet should not return EAGAIN at the same time");
}
}
}
return iError;
}
void VideoDecoder::decodePacket(AVPacket* packet) {
TRACE_SCOPE(tracing::CutsceneFFmpegVideoDecoder);
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
int send_result;
do {
send_result = avcodec_send_packet(m_status->videoCodecCtx, packet);
while(avcodec_receive_frame(m_status->videoCodecCtx, m_decodeFrame) == 0) {
convertAndPushPicture(m_decodeFrame);
}
} while (send_result == AVERROR(EAGAIN));
#else
int finishedFrame = 0;
auto result = avcodec_decode_video2(m_status->videoCodecCtx, m_decodeFrame, &finishedFrame, packet);
if (result >= 0 && finishedFrame) {
convertAndPushPicture(m_decodeFrame);
}
#endif
}
void AudioDecoder::decodePacket(AVPacket* packet) {
TRACE_SCOPE(tracing::CutsceneFFmpegAudioDecoder);
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
int send_result;
do {
send_result = avcodec_send_packet(m_status->audioCodecCtx, packet);
while (avcodec_receive_frame(m_status->audioCodecCtx, m_decodeFrame) == 0) {
handleDecodedFrame(m_decodeFrame);
}
} while (send_result == AVERROR(EAGAIN));
#else
int finishedFrame = 0;
auto err = avcodec_decode_audio4(m_status->audioCodecCtx, m_decodeFrame, &finishedFrame, packet);
if (err >= 0 && finishedFrame) {
handleDecodedFrame(m_decodeFrame);
}
#endif
}
void AudioDecoder::finishDecoding() {
TRACE_SCOPE(tracing::CutsceneFFmpegAudioDecoder);
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
// Send flush packet
avcodec_send_packet(m_status->audioCodecCtx, nullptr);
// Handle those decoders that have a delay
while (true) {
auto ret = avcodec_receive_frame(m_status->audioCodecCtx, m_decodeFrame);
if (ret == 0) {
handleDecodedFrame(m_decodeFrame);
}
else {
// Everything consumed or error
break;
}
}
#else
// Handle those decoders that have a delay
AVPacket nullPacket;
memset(&nullPacket, 0, sizeof(nullPacket));
nullPacket.data = nullptr;
nullPacket.size = 0;
while (true) {
int finishedFrame = 1;
auto err = avcodec_decode_audio4(m_status->audioCodecCtx, m_decodeFrame, &finishedFrame, &nullPacket);
if (err < 0 || !finishedFrame) {
break;
}
handleDecodedFrame(m_decodeFrame);
}
#endif
// Push the last bits of audio data into the queue
flushAudioBuffer();
}
int decode_video_frame (AVCodecContext * picc, const AVPacket * pkt, AVFrame * pf) {
int ok = 0;
// may need to feed multiple times to get one frame
while (1) {
ok = avcodec_send_packet(picc, pkt);
if (ok != 0) {
ok = AVUNERROR(ok);
return ok;
}
ok = avcodec_receive_frame(picc, pf);
ok = AVUNERROR(ok);
if (ok != EAGAIN) {
// maybe failed, just return the error code
return ok;
}
// need to feed raw packet again
}
return ok;
}
int CFFmpegImage::DecodeFFmpegFrame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
{
int ret;
*got_frame = 0;
if (pkt)
{
ret = avcodec_send_packet(avctx, pkt);
// In particular, we don't expect AVERROR(EAGAIN), because we read all
// decoded frames with avcodec_receive_frame() until done.
if (ret < 0)
return ret;
}
ret = avcodec_receive_frame(avctx, frame);
if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
return ret;
if (ret >= 0) // static code analysers would complain
*got_frame = 1;
return 0;
}
void VideoDecoder::finishDecoding() {
TRACE_SCOPE(tracing::CutsceneFFmpegVideoDecoder);
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
// Send flush packet
avcodec_send_packet(m_status->videoCodecCtx, nullptr);
// Handle those decoders that have a delay
while (true) {
auto ret = avcodec_receive_frame(m_status->videoCodecCtx, m_decodeFrame);
if (ret == 0) {
convertAndPushPicture(m_decodeFrame);
} else {
// Everything consumed or error
break;
}
}
#else
// Handle those decoders that have a delay
AVPacket nullPacket;
memset(&nullPacket, 0, sizeof(nullPacket));
nullPacket.data = nullptr;
nullPacket.size = 0;
while (true) {
int finishedFrame = 1;
auto err = avcodec_decode_video2(m_status->videoCodecCtx, m_decodeFrame, &finishedFrame, &nullPacket);
if (err < 0 || !finishedFrame) {
break;
}
convertAndPushPicture(m_decodeFrame);
}
#endif
}
static int compat_decode(AVCodecContext *avctx, AVFrame *frame,
int *got_frame, AVPacket *pkt)
{
AVCodecInternal *avci = avctx->internal;
int ret = 0;
av_assert0(avci->compat_decode_consumed == 0);
*got_frame = 0;
avci->compat_decode = 1;
if (avci->compat_decode_partial_size > 0 &&
avci->compat_decode_partial_size != pkt->size) {
av_log(avctx, AV_LOG_ERROR,
"Got unexpected packet size after a partial decode\n");
ret = AVERROR(EINVAL);
goto finish;
}
if (!avci->compat_decode_partial_size) {
ret = avcodec_send_packet(avctx, pkt);
if (ret == AVERROR_EOF)
ret = 0;
else if (ret == AVERROR(EAGAIN)) {
/* we fully drain all the output in each decode call, so this should not
* ever happen */
ret = AVERROR_BUG;
goto finish;
} else if (ret < 0)
goto finish;
}
while (ret >= 0) {
ret = avcodec_receive_frame(avctx, frame);
if (ret < 0) {
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
ret = 0;
goto finish;
}
if (frame != avci->compat_decode_frame) {
if (!avctx->refcounted_frames) {
ret = unrefcount_frame(avci, frame);
if (ret < 0)
goto finish;
}
*got_frame = 1;
frame = avci->compat_decode_frame;
} else {
if (!avci->compat_decode_warned) {
av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* "
"API cannot return all the frames for this decoder. "
"Some frames will be dropped. Update your code to the "
"new decoding API to fix this.\n");
avci->compat_decode_warned = 1;
}
}
if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size))
break;
}
finish:
if (ret == 0) {
/* if there are any bsfs then assume full packet is always consumed */
if (avctx->codec->bsfs)
ret = pkt->size;
else
ret = FFMIN(avci->compat_decode_consumed, pkt->size);
}
avci->compat_decode_consumed = 0;
avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0;
return ret;
}
static BOOL ffmpeg_decode(AVCodecContext* dec_ctx, AVPacket* pkt,
AVFrame* frame,
AVAudioResampleContext* resampleContext,
AVFrame* resampled, wStream* out)
{
int ret;
/* send the packet with the compressed data to the decoder */
ret = avcodec_send_packet(dec_ctx, pkt);
if (ret < 0)
{
const char* err = av_err2str(ret);
WLog_ERR(TAG, "Error submitting the packet to the decoder %s [%d]",
err, ret);
return FALSE;
}
/* read all the output frames (in general there may be any number of them */
while (ret >= 0)
{
ret = avcodec_receive_frame(dec_ctx, frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return TRUE;
else if (ret < 0)
{
const char* err = av_err2str(ret);
WLog_ERR(TAG, "Error during decoding %s [%d]", err, ret);
return FALSE;
}
if (!avresample_is_open(resampleContext))
{
if ((ret = avresample_config(resampleContext, resampled, frame)) < 0)
{
const char* err = av_err2str(ret);
WLog_ERR(TAG, "Error during resampling %s [%d]", err, ret);
return FALSE;
}
if ((ret = (avresample_open(resampleContext))) < 0)
{
const char* err = av_err2str(ret);
WLog_ERR(TAG, "Error during resampling %s [%d]", err, ret);
return FALSE;
}
}
if ((ret = avresample_convert_frame(resampleContext, resampled, frame)) < 0)
{
const char* err = av_err2str(ret);
WLog_ERR(TAG, "Error during resampling %s [%d]", err, ret);
return FALSE;
}
{
const size_t data_size = resampled->channels * resampled->nb_samples * 2;
Stream_EnsureRemainingCapacity(out, data_size);
Stream_Write(out, resampled->data[0], data_size);
}
}
return TRUE;
}
bool ThumbFinder::getFrameImage(bool needKeyFrame, int64_t requiredPTS)
{
AVPacket pkt;
AVFrame orig;
AVFrame retbuf;
memset(&orig, 0, sizeof(AVFrame));
memset(&retbuf, 0, sizeof(AVFrame));
av_init_packet(&pkt);
int frameFinished = 0;
int keyFrame;
int frameCount = 0;
bool gotKeyFrame = false;
while (av_read_frame(m_inputFC, &pkt) >= 0 && !frameFinished)
{
if (pkt.stream_index == m_videostream)
{
frameCount++;
keyFrame = pkt.flags & AV_PKT_FLAG_KEY;
if (m_startPTS == -1 && pkt.dts != AV_NOPTS_VALUE)
{
m_startPTS = pkt.dts;
m_frameTime = pkt.duration;
}
if (keyFrame)
gotKeyFrame = true;
if (!gotKeyFrame && needKeyFrame)
{
av_packet_unref(&pkt);
continue;
}
if (m_firstIFramePTS == -1)
m_firstIFramePTS = pkt.dts;
av_frame_unref(m_frame);
frameFinished = 0;
int ret = avcodec_receive_frame(m_codecCtx, m_frame);
if (ret == 0)
frameFinished = 1;
if (ret == 0 || ret == AVERROR(EAGAIN))
ret = avcodec_send_packet(m_codecCtx, &pkt);
if (requiredPTS != -1 && pkt.dts != AV_NOPTS_VALUE && pkt.dts < requiredPTS)
frameFinished = false;
m_currentPTS = pkt.dts;
}
av_packet_unref(&pkt);
}
if (frameFinished)
{
av_image_fill_arrays(retbuf.data, retbuf.linesize, m_outputbuf,
AV_PIX_FMT_RGB32, m_frameWidth, m_frameHeight, IMAGE_ALIGN);
AVFrame *tmp = m_frame;
m_deinterlacer->DeinterlaceSingle(tmp, tmp);
m_copy.Copy(&retbuf, AV_PIX_FMT_RGB32, tmp, m_codecCtx->pix_fmt,
m_frameWidth, m_frameHeight);
QImage img(m_outputbuf, m_frameWidth, m_frameHeight,
QImage::Format_RGB32);
QByteArray ffile = m_frameFile.toLocal8Bit();
if (!img.save(ffile.constData(), "JPEG"))
{
LOG(VB_GENERAL, LOG_ERR, "Failed to save thumb: " + m_frameFile);
}
if (m_updateFrame)
{
MythImage *mimage =
GetMythMainWindow()->GetCurrentPainter()->GetFormatImage();
mimage->Assign(img);
m_frameImage->SetImage(mimage);
mimage->DecrRef();
}
updateCurrentPos();
}
return true;
}
CDVDVideoCodec::VCReturn CDVDVideoCodecFFmpeg::GetPicture(VideoPicture* pVideoPicture)
{
if (m_eof)
{
return VC_EOF;
}
// handle hw accelerators first, they may have frames ready
if (m_pHardware)
{
int flags = m_codecControlFlags;
flags &= ~DVD_CODEC_CTRL_DRAIN;
m_pHardware->SetCodecControl(flags);
CDVDVideoCodec::VCReturn ret = m_pHardware->Decode(m_pCodecContext, nullptr);
if (ret == VC_PICTURE)
{
if (m_pHardware->GetPicture(m_pCodecContext, pVideoPicture))
return VC_PICTURE;
else
return VC_ERROR;
}
else if (ret == VC_BUFFER)
;
else
return ret;
}
else if (m_pFilterGraph && !m_filterEof)
{
CDVDVideoCodec::VCReturn ret = FilterProcess(nullptr);
if (ret == VC_PICTURE)
{
if (!SetPictureParams(pVideoPicture))
return VC_ERROR;
return VC_PICTURE;
}
else if (ret == VC_BUFFER)
;
else
return ret;
}
// process ffmpeg
if (m_codecControlFlags & DVD_CODEC_CTRL_DRAIN)
{
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.data = nullptr;
avpkt.size = 0;
avpkt.dts = AV_NOPTS_VALUE;
avpkt.pts = AV_NOPTS_VALUE;
avcodec_send_packet(m_pCodecContext, &avpkt);
}
int ret = avcodec_receive_frame(m_pCodecContext, m_pDecodedFrame);
if (m_decoderState == STATE_HW_FAILED && !m_pHardware)
return VC_REOPEN;
if(m_iLastKeyframe < m_pCodecContext->has_b_frames + 2)
m_iLastKeyframe = m_pCodecContext->has_b_frames + 2;
if (ret == AVERROR_EOF)
{
// next drain hw accel or filter
if (m_pHardware)
{
int flags = m_codecControlFlags;
flags |= DVD_CODEC_CTRL_DRAIN;
m_pHardware->SetCodecControl(flags);
int ret = m_pHardware->Decode(m_pCodecContext, nullptr);
if (ret == VC_PICTURE)
{
if (m_pHardware->GetPicture(m_pCodecContext, pVideoPicture))
return VC_PICTURE;
else
return VC_ERROR;
}
else
{
m_eof = true;
CLog::Log(LOGDEBUG, "CDVDVideoCodecFFmpeg::GetPicture - eof hw accel");
return VC_EOF;
}
}
else if (m_pFilterGraph && !m_filterEof)
{
int ret = FilterProcess(nullptr);
if (ret == VC_PICTURE)
{
if (!SetPictureParams(pVideoPicture))
return VC_ERROR;
else
return VC_PICTURE;
}
else
{
m_eof = true;
CLog::Log(LOGDEBUG, "CDVDVideoCodecFFmpeg::GetPicture - eof filter");
return VC_EOF;
}
}
else
{
m_eof = true;
CLog::Log(LOGDEBUG, "CDVDVideoCodecFFmpeg::GetPicture - eof");
return VC_EOF;
}
}
else if (ret == AVERROR(EAGAIN))
{
return VC_BUFFER;
}
else if (ret)
{
CLog::Log(LOGERROR, "%s - avcodec_receive_frame returned failure", __FUNCTION__);
return VC_ERROR;
}
// here we got a frame
int64_t framePTS = m_pDecodedFrame->best_effort_timestamp;
if (m_pCodecContext->skip_frame > AVDISCARD_DEFAULT)
{
if (m_dropCtrl.m_state == CDropControl::VALID &&
m_dropCtrl.m_lastPTS != AV_NOPTS_VALUE &&
framePTS != AV_NOPTS_VALUE &&
framePTS > (m_dropCtrl.m_lastPTS + m_dropCtrl.m_diffPTS * 1.5))
{
m_droppedFrames++;
if (m_interlaced)
m_droppedFrames++;
}
}
m_dropCtrl.Process(framePTS, m_pCodecContext->skip_frame > AVDISCARD_DEFAULT);
if (m_pDecodedFrame->key_frame)
{
m_started = true;
m_iLastKeyframe = m_pCodecContext->has_b_frames + 2;
}
if (m_pDecodedFrame->interlaced_frame)
m_interlaced = true;
else
m_interlaced = false;
if (!m_started)
{
int frames = 300;
if (m_dropCtrl.m_state == CDropControl::VALID)
frames = static_cast<int>(6000000 / m_dropCtrl.m_diffPTS);
if (m_iLastKeyframe >= frames && m_pDecodedFrame->pict_type == AV_PICTURE_TYPE_I)
{
m_started = true;
}
else
{
av_frame_unref(m_pDecodedFrame);
return VC_BUFFER;
}
}
// push the frame to hw decoder for further processing
if (m_pHardware)
{
av_frame_unref(m_pFrame);
av_frame_move_ref(m_pFrame, m_pDecodedFrame);
CDVDVideoCodec::VCReturn ret = m_pHardware->Decode(m_pCodecContext, m_pFrame);
if (ret == VC_FLUSHED)
{
Reset();
return ret;
}
else if (ret == VC_FATAL)
{
m_decoderState = STATE_HW_FAILED;
return VC_REOPEN;
}
else if (ret == VC_PICTURE)
{
if (m_pHardware->GetPicture(m_pCodecContext, pVideoPicture))
return VC_PICTURE;
else
return VC_ERROR;
}
return ret;
}
// process filters for sw decoding
else
{
SetFilters();
bool need_scale = std::find(m_formats.begin(),
m_formats.end(),
m_pCodecContext->pix_fmt) == m_formats.end();
bool need_reopen = false;
if (m_filters != m_filters_next)
need_reopen = true;
if (!m_filters_next.empty() && m_filterEof)
need_reopen = true;
if (m_pFilterIn)
{
if (m_pFilterIn->outputs[0]->format != m_pCodecContext->pix_fmt ||
m_pFilterIn->outputs[0]->w != m_pCodecContext->width ||
m_pFilterIn->outputs[0]->h != m_pCodecContext->height)
need_reopen = true;
}
// try to setup new filters
if (need_reopen || (need_scale && m_pFilterGraph == nullptr))
{
m_filters = m_filters_next;
if (FilterOpen(m_filters, need_scale) < 0)
FilterClose();
}
if (m_pFilterGraph && !m_filterEof)
{
CDVDVideoCodec::VCReturn ret = FilterProcess(m_pDecodedFrame);
if (ret != VC_PICTURE)
return VC_NONE;
}
else
{
av_frame_unref(m_pFrame);
av_frame_move_ref(m_pFrame, m_pDecodedFrame);
}
if (!SetPictureParams(pVideoPicture))
return VC_ERROR;
else
return VC_PICTURE;
}
return VC_NONE;
}
static void handle_packet(struct vidsrc_st *st, AVPacket *pkt)
{
AVFrame *frame = NULL;
struct vidframe vf;
struct vidsz sz;
unsigned i;
if (st->codec) {
int got_pict, ret;
#if LIBAVUTIL_VERSION_INT >= ((52<<16)+(20<<8)+100)
frame = av_frame_alloc();
#else
frame = avcodec_alloc_frame();
#endif
#if LIBAVCODEC_VERSION_INT >= ((57<<16)+(37<<8)+100)
ret = avcodec_send_packet(st->ctx, pkt);
if (ret < 0)
goto out;
ret = avcodec_receive_frame(st->ctx, frame);
if (ret < 0)
goto out;
got_pict = true;
#elif LIBAVCODEC_VERSION_INT <= ((52<<16)+(23<<8)+0)
ret = avcodec_decode_video(st->ctx, frame, &got_pict,
pkt->data, pkt->size);
#else
ret = avcodec_decode_video2(st->ctx, frame,
&got_pict, pkt);
#endif
if (ret < 0 || !got_pict)
goto out;
sz.w = st->ctx->width;
sz.h = st->ctx->height;
/* check if size changed */
if (!vidsz_cmp(&sz, &st->sz)) {
info("avformat: size changed: %d x %d ---> %d x %d\n",
st->sz.w, st->sz.h, sz.w, sz.h);
st->sz = sz;
}
}
else {
/* No-codec option is not supported */
return;
}
#if LIBAVCODEC_VERSION_INT >= ((53<<16)+(5<<8)+0)
switch (frame->format) {
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUVJ420P:
vf.fmt = VID_FMT_YUV420P;
break;
default:
warning("avformat: decode: bad pixel format"
" (%i) (%s)\n",
frame->format,
av_get_pix_fmt_name(frame->format));
goto out;
}
#else
vf.fmt = VID_FMT_YUV420P;
#endif
vf.size = sz;
for (i=0; i<4; i++) {
vf.data[i] = frame->data[i];
vf.linesize[i] = frame->linesize[i];
}
st->frameh(&vf, st->arg);
out:
if (frame) {
#if LIBAVUTIL_VERSION_INT >= ((52<<16)+(20<<8)+100)
av_frame_free(&frame);
#else
av_free(frame);
#endif
}
}
/**
* Decode one audio frame from the input file.
* @param frame Audio frame to be decoded
* @param input_format_context Format context of the input file
* @param input_codec_context Codec context of the input file
* @param[out] data_present Indicates whether data has been decoded
* @param[out] finished Indicates whether the end of file has
* been reached and all data has been
* decoded. If this flag is false, there
* is more data to be decoded, i.e., this
* function has to be called again.
* @return Error code (0 if successful)
*/
int Transcode::decode_audio_frame(AVFrame *frame,
AVFormatContext *input_format_context,
AVCodecContext *input_codec_context,
int *data_present, int *finished)
{
/* Packet used for temporary storage. */
AVPacket input_packet;
int error;
init_packet(&input_packet);
/* Read one audio frame from the input file into a temporary packet. */
if ((error = av_read_frame(input_format_context, &input_packet)) < 0) {
/* If we are at the end of the file, flush the decoder below. */
if (error == AVERROR_EOF)
*finished = 1;
else {
fprintf(stderr, "Could not read frame (error '%s')\n",
av_cplus_err2str(error));
return error;
}
}
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57, 48, 0)
/* Decode the audio frame stored in the temporary packet.
* The input audio stream decoder is used to do this.
* If we are at the end of the file, pass an empty packet to the decoder
* to flush it. */
if ((error = avcodec_decode_audio4(input_codec_context, frame,
data_present, &input_packet)) < 0) {
fprintf(stderr, "Could not decode frame (error '%s')\n",
av_cplus_err2str(error));
av_packet_unref(&input_packet);
return error;
}
#else
int ret;
// AVERROR(EAGAIN) means that we need to feed more
// That we can decode Frame or Packet
do {
do {
ret = avcodec_send_packet(input_codec_context, &input_packet);
} while(ret == AVERROR(EAGAIN));
if(ret == AVERROR_EOF || ret == AVERROR(EINVAL)) {
printf("AVERROR(EAGAIN): %d, AVERROR_EOF: %d, AVERROR(EINVAL): %d\n", AVERROR(EAGAIN), AVERROR_EOF, AVERROR(EINVAL));
printf("fe_read_frame: Frame getting error (%d)!\n", ret);
return ret;
} else {
*data_present = 1;
}
ret = avcodec_receive_frame(input_codec_context, frame);
} while(ret == AVERROR(EAGAIN));
if(ret == AVERROR_EOF){
*finished = 1;
*data_present = 0;
}
if(ret == AVERROR(EINVAL)) {
// An error or EOF occured,index break out and return what
// we have so far.
// printf("AVERROR(EAGAIN): %d, AVERROR_EOF: %d, AVERROR(EINVAL): %d\n", AVERROR(EAGAIN), AVERROR_EOF, AVERROR(EINVAL));
// printf("fe_read_frame: EOF or some othere decoding error (%d)!\n", ret);
fprintf(stderr, "Could not decode frame (error '%s')\n",
av_cplus_err2str(ret));
av_packet_unref(&input_packet);
return ret;
}
#endif
/* If the decoder has not been flushed completely, we are not finished,
* so that this function has to be called again. */
if (*finished && *data_present)
*finished = 0;
av_packet_unref(&input_packet);
return 0;
}
/*****************************************************************************
* DecodeAudio: Called to decode one frame
*****************************************************************************/
static block_t *DecodeAudio( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
AVCodecContext *ctx = p_sys->p_context;
AVFrame *frame = NULL;
block_t *p_block = NULL;
if( !ctx->extradata_size && p_dec->fmt_in.i_extra && p_sys->b_delayed_open)
{
InitDecoderConfig( p_dec, ctx );
OpenAudioCodec( p_dec );
}
if( p_sys->b_delayed_open )
{
if( pp_block )
p_block = *pp_block;
goto drop;
}
/* Flushing or decoding, we return any block ready from multiple frames output */
if( p_sys->p_decoded )
return DequeueOneDecodedFrame( p_sys );
if( pp_block == NULL ) /* Drain request */
{
/* we don't need to care about return val */
(void) avcodec_send_packet( ctx, NULL );
}
else
{
p_block = *pp_block;
}
if( p_block )
{
if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
{
Flush( p_dec );
goto drop;
}
if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
{
date_Set( &p_sys->end_date, VLC_TS_INVALID );
}
/* We've just started the stream, wait for the first PTS. */
if( !date_Get( &p_sys->end_date ) && p_block->i_pts <= VLC_TS_INVALID )
goto drop;
if( p_block->i_buffer <= 0 )
goto drop;
if( (p_block->i_flags & BLOCK_FLAG_PRIVATE_REALLOCATED) == 0 )
{
p_block = block_Realloc( p_block, 0, p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
if( !p_block )
return NULL;
*pp_block = p_block;
p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
memset( &p_block->p_buffer[p_block->i_buffer], 0, FF_INPUT_BUFFER_PADDING_SIZE );
p_block->i_flags |= BLOCK_FLAG_PRIVATE_REALLOCATED;
}
}
frame = av_frame_alloc();
if (unlikely(frame == NULL))
goto end;
for( int ret = 0; ret == 0; )
{
/* Feed in the loop as buffer could have been full on first iterations */
if( p_block )
{
AVPacket pkt;
av_init_packet( &pkt );
pkt.data = p_block->p_buffer;
pkt.size = p_block->i_buffer;
ret = avcodec_send_packet( ctx, &pkt );
if( ret == 0 ) /* Block has been consumed */
{
/* Only set new pts from input block if it has been used,
* otherwise let it be through interpolation */
if( p_block->i_pts > date_Get( &p_sys->end_date ) )
{
date_Set( &p_sys->end_date, p_block->i_pts );
}
block_Release( p_block );
*pp_block = p_block = NULL;
}
else if ( ret != AVERROR(EAGAIN) ) /* Errors other than buffer full */
{
if( ret == AVERROR(ENOMEM) || ret == AVERROR(EINVAL) )
goto end;
else
goto drop;
}
}
/* Try to read one or multiple frames */
ret = avcodec_receive_frame( ctx, frame );
if( ret == 0 )
{
/* checks and init from first decoded frame */
if( ctx->channels <= 0 || ctx->channels > 8 || ctx->sample_rate <= 0 )
{
msg_Warn( p_dec, "invalid audio properties channels count %d, sample rate %d",
ctx->channels, ctx->sample_rate );
goto drop;
}
else if( p_dec->fmt_out.audio.i_rate != (unsigned int)ctx->sample_rate )
{
date_Init( &p_sys->end_date, ctx->sample_rate, 1 );
}
SetupOutputFormat( p_dec, true );
if( decoder_UpdateAudioFormat( p_dec ) )
goto drop;
block_t *p_converted = ConvertAVFrame( p_dec, frame ); /* Consumes frame */
if( p_converted )
{
/* Silent unwanted samples */
if( p_sys->i_reject_count > 0 )
{
memset( p_converted->p_buffer, 0, p_converted->i_buffer );
p_sys->i_reject_count--;
}
p_converted->i_buffer = p_converted->i_nb_samples
* p_dec->fmt_out.audio.i_bytes_per_frame;
p_converted->i_pts = date_Get( &p_sys->end_date );
p_converted->i_length = date_Increment( &p_sys->end_date,
p_converted->i_nb_samples ) - p_converted->i_pts;
block_ChainLastAppend( &p_sys->pp_decoded_last, p_converted );
}
/* Prepare new frame */
frame = av_frame_alloc();
if (unlikely(frame == NULL))
break;
}
else av_frame_free( &frame );
};
return ( p_sys->p_decoded ) ? DequeueOneDecodedFrame( p_sys ) : NULL;
end:
p_dec->b_error = true;
if( pp_block )
{
assert( *pp_block == p_block );
*pp_block = NULL;
}
drop:
if( p_block != NULL )
block_Release(p_block);
if( frame != NULL )
av_frame_free( &frame );
return NULL;
}
int main(int argc, char **argv)
{
int ret;
AVPacket packet;
AVFrame *frame = av_frame_alloc();
AVFrame *filt_frame = av_frame_alloc();
if (!frame || !filt_frame) {
perror("Could not allocate frame");
exit(1);
}
if (argc != 2) {
fprintf(stderr, "Usage: %s file | %s\n", argv[0], player);
exit(1);
}
if ((ret = open_input_file(argv[1])) < 0)
goto end;
if ((ret = init_filters(filter_descr)) < 0)
goto end;
/* read all packets */
while (1) {
if ((ret = av_read_frame(fmt_ctx, &packet)) < 0)
break;
if (packet.stream_index == audio_stream_index) {
ret = avcodec_send_packet(dec_ctx, &packet);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while sending a packet to the decoder\n");
break;
}
while (ret >= 0) {
ret = avcodec_receive_frame(dec_ctx, frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
break;
} else if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while receiving a frame from the decoder\n");
goto end;
}
if (ret >= 0) {
/* push the audio data from decoded frame into the filtergraph */
if (av_buffersrc_add_frame_flags(buffersrc_ctx, frame, AV_BUFFERSRC_FLAG_KEEP_REF) < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while feeding the audio filtergraph\n");
break;
}
/* pull filtered audio from the filtergraph */
while (1) {
ret = av_buffersink_get_frame(buffersink_ctx, filt_frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
break;
if (ret < 0)
goto end;
print_frame(filt_frame);
av_frame_unref(filt_frame);
}
av_frame_unref(frame);
}
}
}
av_packet_unref(&packet);
}
end:
avfilter_graph_free(&filter_graph);
avcodec_free_context(&dec_ctx);
avformat_close_input(&fmt_ctx);
av_frame_free(&frame);
av_frame_free(&filt_frame);
if (ret < 0 && ret != AVERROR_EOF) {
fprintf(stderr, "Error occurred: %s\n", av_err2str(ret));
exit(1);
}
exit(0);
}
bool FFmpegAudioReader::readFrame(AVFrame* decode_frame) {
// FFmpeg 3.1 and onwards has a new, better packet handling API but that version is relatively new so we still need
// to support the earlier API. The compatibility code can be removed once the new version is supported by most platforms
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
// Process pending frames
auto pending_res = avcodec_receive_frame(_codec_ctx, decode_frame);
if (pending_res == 0) {
// Got a frame
return true;
}
if (pending_res == AVERROR_EOF) {
// No more frames available
return false;
}
if (pending_res != AVERROR(EAGAIN)) {
// Unknown error.
return false;
}
#else
if (_currentPacket != nullptr) {
// Got some data left
int finishedFrame = 0;
auto bytes_read = avcodec_decode_audio4(_codec_ctx, decode_frame, &finishedFrame, _currentPacket);
if (bytes_read < 0) {
// Error!
return false;
}
_currentPacket->data += bytes_read;
_currentPacket->size -= bytes_read;
if (_currentPacket->size <= 0) {
// Done with this packet
av_packet_free(&_currentPacket);
}
if (finishedFrame) {
return true;
}
}
#endif
AVPacket packet;
while (av_read_frame(_format_ctx, &packet) >= 0) {
AVPacketScope packet_scope(&packet);
if (packet.stream_index == _stream_idx) {
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
auto res = avcodec_send_packet(_codec_ctx, &packet);
if (res != 0) {
// Error or EOF
return false;
}
res = avcodec_receive_frame(_codec_ctx, decode_frame);
if (res == 0) {
// Got a frame
return true;
}
if (res == AVERROR_EOF) {
// No more frames available
return false;
}
if (res != AVERROR(EAGAIN)) {
// Unknown error.
return false;
}
// EGAIN was returned, send new input
#else
int finishedFrame = 0;
auto bytes_read = avcodec_decode_audio4(_codec_ctx, decode_frame, &finishedFrame, &packet);
if (bytes_read < packet.size) {
// Not all data was read
packet.data += bytes_read;
packet.size -= bytes_read;
_currentPacket = av_packet_clone(&packet);
}
if (finishedFrame) {
return true;
}
if (bytes_read < 0) {
// Error
return false;
}
#endif
}
}
#if LIBAVCODEC_VERSION_INT > AV_VERSION_INT(57, 24, 255)
// Flush decoder
if (avcodec_send_packet(_codec_ctx, nullptr) != 0) {
return false;
}
auto flush_res = avcodec_receive_frame(_codec_ctx, decode_frame);
if (flush_res == 0) {
// Got a frame
return true;
}
#else
AVPacket nullPacket;
memset(&nullPacket, 0, sizeof(nullPacket));
nullPacket.data = nullptr;
nullPacket.size = 0;
int finishedFrame = 1;
auto err = avcodec_decode_audio4(_codec_ctx, decode_frame, &finishedFrame, &nullPacket);
if (finishedFrame && err >= 0) {
return true;
}
#endif
// If we are here then read_frame reached the end or returned an error
return false;
}
