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Code Issues Releases Activity

cyuv: implement raw cyuv

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Fixes Ticket1620

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-29 23:58:50 +02:00
parent 99b18b110c
commit 01aa664f21
1 changed files with 16 additions and 2 deletions
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18
libavcodec/cyuv.c
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@ -53,7 +53,6 @@ static av_cold int cyuv_decode_init(AVCodecContext *avctx)
if (s->width & 0x3)
return -1;
s->height = avctx->height;
avctx->pix_fmt = PIX_FMT_YUV411P;
avcodec_get_frame_defaults(&s->frame);
return 0;
@ -83,6 +82,7 @@ static int cyuv_decode_frame(AVCodecContext *avctx,
int stream_ptr;
unsigned char cur_byte;
int pixel_groups;
int rawsize = s->height * FFALIGN(s->width,2) * 2;
if (avctx->codec_id == AV_CODEC_ID_AURA) {
y_table = u_table;
@ -92,7 +92,11 @@ static int cyuv_decode_frame(AVCodecContext *avctx,
* followed by (height) lines each with 3 bytes to represent groups
* of 4 pixels. Thus, the total size of the buffer ought to be:
* (3 * 16) + height * (width * 3 / 4) */
if (buf_size != 48 + s->height * (s->width * 3 / 4)) {
if (buf_size == 48 + s->height * (s->width * 3 / 4)) {
avctx->pix_fmt = PIX_FMT_YUV411P;
} else if(buf_size == rawsize ) {
avctx->pix_fmt = PIX_FMT_UYVY422;
} else {
av_log(avctx, AV_LOG_ERROR, "got a buffer with %d bytes when %d were expected\n",
buf_size, 48 + s->height * (s->width * 3 / 4));
return -1;
@ -115,6 +119,15 @@ static int cyuv_decode_frame(AVCodecContext *avctx,
u_plane = s->frame.data[1];
v_plane = s->frame.data[2];
if (buf_size == rawsize) {
int linesize = FFALIGN(s->width,2) * 2;
y_plane += s->frame.linesize[0] * s->height;
for (stream_ptr = 0; stream_ptr < rawsize; stream_ptr += linesize) {
y_plane -= s->frame.linesize[0];
memcpy(y_plane, buf+stream_ptr, linesize);
}
} else {
/* iterate through each line in the height */
for (y_ptr = 0, u_ptr = 0, v_ptr = 0;
y_ptr < (s->height * s->frame.linesize[0]);
@ -162,6 +175,7 @@ static int cyuv_decode_frame(AVCodecContext *avctx,
}
}
}
*data_size=sizeof(AVFrame);
*(AVFrame*)data= s->frame;