void FFMS_AudioSource::Init(const FFMS_Index &Index, int DelayMode) {
// Decode the first packet to ensure all properties are initialized
// Don't cache it since it might be in the wrong format
// Instead, leave it in DecodeFrame and it'll get cached later
while (DecodeFrame->nb_samples == 0)
DecodeNextBlock();
// Read properties of the audio which may not be available until the first
// frame has been decoded
FillAP(AP, CodecContext, Frames);
if (AP.SampleRate <= 0 || AP.BitsPerSample <= 0)
throw FFMS_Exception(FFMS_ERROR_DECODING, FFMS_ERROR_CODEC,
"Codec returned zero size audio");
std::auto_ptr<FFMS_ResampleOptions> opt(CreateResampleOptions());
SetOutputFormat(opt.get());
if (DelayMode < FFMS_DELAY_NO_SHIFT)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Bad audio delay compensation mode");
if (DelayMode == FFMS_DELAY_NO_SHIFT) return;
if (DelayMode > (signed)Index.size())
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Out of bounds track index selected for audio delay compensation");
if (DelayMode >= 0 && Index[DelayMode].TT != FFMS_TYPE_VIDEO)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Audio delay compensation must be relative to a video track");
int64_t Delay = 0;
if (DelayMode != FFMS_DELAY_TIME_ZERO) {
if (DelayMode == FFMS_DELAY_FIRST_VIDEO_TRACK) {
for (size_t i = 0; i < Index.size(); ++i) {
if (Index[i].TT == FFMS_TYPE_VIDEO && !Index[i].empty()) {
DelayMode = i;
break;
}
}
}
if (DelayMode >= 0) {
const FFMS_Track &VTrack = Index[DelayMode];
Delay = -(VTrack[0].PTS * VTrack.TB.Num * AP.SampleRate / (VTrack.TB.Den * 1000));
}
}
if (Frames.HasTS) {
int i = 0;
while (Frames[i].PTS == ffms_av_nopts_value) ++i;
Delay += Frames[i].PTS * Frames.TB.Num * AP.SampleRate / (Frames.TB.Den * 1000);
for (; i >= 0; --i)
Delay -= Frames[i].SampleCount;
}
AP.NumSamples += Delay;
}
FFMS_AudioSource::FFMS_AudioSource(const char *SourceFile, FFMS_Index &Index, int Track)
: Delay(0)
, MaxCacheBlocks(50)
, BytesPerSample(0)
, NeedsResample(false)
, CurrentSample(-1)
, PacketNumber(0)
, CurrentFrame(NULL)
, TrackNumber(Track)
, SeekOffset(0)
, Index(Index)
{
if (Track < 0 || Track >= static_cast<int>(Index.size()))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Out of bounds track index selected");
if (Index[Track].TT != FFMS_TYPE_AUDIO)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Not an audio track");
if (Index[Track].empty())
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Audio track contains no audio frames");
if (!Index.CompareFileSignature(SourceFile))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_FILE_MISMATCH,
"The index does not match the source file");
Frames = Index[Track];
Index.AddRef();
}
FFMS_VideoSource::FFMS_VideoSource(const char *SourceFile, FFMS_Index &Index, int Track, int Threads)
: Index(Index)
, CodecContext(NULL)
{
if (Track < 0 || Track >= static_cast<int>(Index.size()))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Out of bounds track index selected");
if (Index[Track].TT != FFMS_TYPE_VIDEO)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Not a video track");
if (Index[Track].empty())
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Video track contains no frames");
if (!Index.CompareFileSignature(SourceFile))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_FILE_MISMATCH,
"The index does not match the source file");
Frames = Index[Track];
VideoTrack = Track;
memset(&VP, 0, sizeof(VP));
SWS = NULL;
LastFrameNum = 0;
CurrentFrame = 1;
DelayCounter = 0;
InitialDecode = 1;
LastFrameHeight = -1;
LastFrameWidth = -1;
LastFramePixelFormat = PIX_FMT_NONE;
TargetHeight = -1;
TargetWidth = -1;
TargetResizer = 0;
OutputFormat = PIX_FMT_NONE;
OutputColorSpace = AVCOL_SPC_UNSPECIFIED;
OutputColorRange = AVCOL_RANGE_UNSPECIFIED;
InputFormatOverridden = false;
InputFormat = PIX_FMT_NONE;
InputColorSpace = AVCOL_SPC_UNSPECIFIED;
InputColorRange = AVCOL_RANGE_UNSPECIFIED;
if (Threads < 1)
DecodingThreads = GetNumberOfLogicalCPUs();
else
DecodingThreads = Threads;
DecodeFrame = avcodec_alloc_frame();
LastDecodedFrame = avcodec_alloc_frame();
// Dummy allocations so the unallocated case doesn't have to be handled later
avpicture_alloc(&SWSFrame, PIX_FMT_GRAY8, 16, 16);
Index.AddRef();
}
FFMS_AudioSource::FFMS_AudioSource(const char *SourceFile, FFMS_Index &Index, int Track)
: TrackNumber(Track)
{
if (Track < 0 || Track >= static_cast<int>(Index.size()))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Out of bounds track index selected");
if (Index[Track].TT != FFMS_TYPE_AUDIO)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Not an audio track");
if (Index[Track].empty())
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Audio track contains no audio frames");
if (!Index.CompareFileSignature(SourceFile))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_FILE_MISMATCH,
"The index does not match the source file");
Frames = Index[Track];
}
FFMS_VideoSource::FFMS_VideoSource(const char *SourceFile, FFMS_Index &Index, int Track, int Threads)
: Index(Index)
, CodecContext(nullptr)
{
if (Track < 0 || Track >= static_cast<int>(Index.size()))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Out of bounds track index selected");
if (Index[Track].TT != FFMS_TYPE_VIDEO)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Not a video track");
if (Index[Track].empty())
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_INVALID_ARGUMENT,
"Video track contains no frames");
if (!Index.CompareFileSignature(SourceFile))
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_FILE_MISMATCH,
"The index does not match the source file");
Frames = Index[Track];
VideoTrack = Track;
VP = {};
LocalFrame = {};
SWS = nullptr;
LastFrameNum = 0;
CurrentFrame = 1;
DelayCounter = 0;
InitialDecode = 1;
LastFrameHeight = -1;
LastFrameWidth = -1;
LastFramePixelFormat = FFMS_PIX_FMT(NONE);
TargetHeight = -1;
TargetWidth = -1;
TargetResizer = 0;
OutputFormat = FFMS_PIX_FMT(NONE);
OutputColorSpace = AVCOL_SPC_UNSPECIFIED;
OutputColorRange = AVCOL_RANGE_UNSPECIFIED;
InputFormatOverridden = false;
InputFormat = FFMS_PIX_FMT(NONE);
InputColorSpace = AVCOL_SPC_UNSPECIFIED;
InputColorRange = AVCOL_RANGE_UNSPECIFIED;
if (Threads < 1)
// libav current has issues with greater than 16 threads
DecodingThreads = (std::min)(std::thread::hardware_concurrency(), 16u);
else
DecodingThreads = Threads;
DecodeFrame = av_frame_alloc();
LastDecodedFrame = av_frame_alloc();
// Dummy allocations so the unallocated case doesn't have to be handled later
if (av_image_alloc(SWSFrameData, SWSFrameLinesize, 16, 16, FFMS_PIX_FMT(GRAY8), 4) < 0)
throw FFMS_Exception(FFMS_ERROR_INDEX, FFMS_ERROR_ALLOCATION_FAILED,
"Could not allocate dummy frame.");
Index.AddRef();
}