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FFMPEG Plugin: Calculate media_header.size_used field 

- This field is needed by the dvb.media_addon to detect a format change so
  fill it with the correct value.
- Updated documentation accordingly to reflect reordered function calls and new
  assumptions based on the function call ordering.
This commit is contained in:
Colin Günther 2014-08-07 19:59:31 +02:00
parent 069bc5b597
commit b77f1724a2
1 changed files with 11 additions and 11 deletions
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22
src/add-ons/media/plugins/ffmpeg/AVCodecDecoder.cpp
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@ -680,7 +680,7 @@ AVCodecDecoder::_DecodeVideo(void* outBuffer, int64* outFrameCount,
*outFrameCount = 1;
*mediaHeader = fHeader;
memcpy(outBuffer, fDecodedData, fDecodedDataSizeInBytes);
memcpy(outBuffer, fDecodedData, mediaHeader->size_used);
fDecodedDataSizeInBytes = 0;
@ -960,8 +960,8 @@ AVCodecDecoder::_CopyChunkToVideoChunkBufferAndAddPadding(const void* chunk,
void
AVCodecDecoder::_HandleNewVideoFrameAndUpdateSystemState()
{
_UpdateMediaHeaderForVideoFrame();
_DeinterlaceAndColorConvertVideoFrame();
_UpdateMediaHeaderForVideoFrame();
ConvertAVCodecContextToVideoFrameRate(*fContext, fOutputFrameRate);
@ -1023,15 +1023,15 @@ AVCodecDecoder::_FlushOneVideoFrameFromDecoderBuffer()
1. We actually got a new picture decoded by the video decoder.
2. fHeader wasn't updated for the new picture yet. You MUST call this
method only once per decoded video frame.
3. This function MUST be called before
_DeinterlaceAndColorConvertVideoFrame() as the later one relys on an
updated fHeader.
3. This function MUST be called after
_DeinterlaceAndColorConvertVideoFrame() as it relys on an updated
fDecodedDataSizeInBytes.
4. There will be at maximumn only one decoded video frame in our cache
at any single point in time. Otherwise you couldn't tell to which
cached decoded video frame the properties in fHeader relate to.
5. AVCodecContext is still valid for this video frame (This is the case
when this function is called immediately after
avcodec_decode_video2().
when this function is called after avcodec_decode_video2() and
before the next call to avcodec_decode_video2().
*/
void
AVCodecDecoder::_UpdateMediaHeaderForVideoFrame()
@ -1040,6 +1040,7 @@ AVCodecDecoder::_UpdateMediaHeaderForVideoFrame()
fHeader.file_pos = 0;
fHeader.orig_size = 0;
fHeader.start_time = fRawDecodedPicture->reordered_opaque;
fHeader.size_used = fDecodedDataSizeInBytes;
fHeader.u.raw_video.display_line_width = fRawDecodedPicture->width;
fHeader.u.raw_video.display_line_count = fRawDecodedPicture->height;
fHeader.u.raw_video.bytes_per_row
@ -1071,8 +1072,7 @@ AVCodecDecoder::_UpdateMediaHeaderForVideoFrame()
converted yet (otherwise this function behaves in unknown manners).
You should only call this function when you got a new picture decoded by
the video decoder and the fHeader variable was updated accordingly (\see
_UpdateMediaHeaderForVideoFrame()).
the video decoder..
When this function finishes the postprocessed video frame will be available
in fPostProcessedDecodedPicture and fDecodedData (fDecodedDataSizeInBytes
@ -1081,8 +1081,8 @@ AVCodecDecoder::_UpdateMediaHeaderForVideoFrame()
void
AVCodecDecoder::_DeinterlaceAndColorConvertVideoFrame()
{
int displayWidth = fHeader.u.raw_video.display_line_width;
int displayHeight = fHeader.u.raw_video.display_line_count;
int displayWidth = fRawDecodedPicture->width;
int displayHeight = fRawDecodedPicture->height;
AVPicture deinterlacedPicture;
bool useDeinterlacedPicture = false;