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Code Issues Releases Activity

avcodec: add avcodec_enum_to_chroma_pos()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-07-17 22:30:54 +02:00
parent 4443213d2e
commit b7397857e2
2 changed files with 23 additions and 0 deletions
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11
libavcodec/avcodec.h
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@ -3606,6 +3606,17 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
int linesize_align[AV_NUM_DATA_POINTERS]);
/**
* Converts AVChromaLocation to swscale x/y chroma position.
*
* The positions represent the chroma (0,0) position in a coordinates system
* with luma (0,0) representing the origin and luma(1,1) representing 256,256
*
* @param xpos horizontal chroma sample position
* @param ypos vertical chroma sample position
*/
int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
#if FF_API_OLD_DECODE_AUDIO
/**
* Wrapper function which calls avcodec_decode_audio4.

12
libavcodec/utils.c
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@ -338,6 +338,18 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
*width = FFALIGN(*width, align);
}
int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos)
{
if (pos <= AVCHROMA_LOC_UNSPECIFIED || pos >= AVCHROMA_LOC_NB)
return AVERROR(EINVAL);
pos--;
*xpos = (pos&1) * 128;
*ypos = ((pos>>1)^(pos<4)) * 128;
return 0;
}
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
enum AVSampleFormat sample_fmt, const uint8_t *buf,
int buf_size, int align)