virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-21 10:55:51 +02:00
Code Issues Releases Activity

rawdec: support AVRn 1:1 raw interlaced mode

Browse Source 
Fixes Ticket971

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-08-18 04:03:03 +02:00
parent e35c0ee05c
commit 0de4918f32
1 changed files with 45 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
libavcodec/rawdec.c
View File

@ -39,6 +39,7 @@ typedef struct RawVideoContext {
unsigned char * buffer; /* block of memory for holding one frame */
int length; /* number of bytes in buffer */
int flip;
int interlace;
AVFrame pic; ///< AVCodecContext.coded_frame
int tff;
} RawVideoContext;
@ -130,6 +131,17 @@ static av_cold int raw_init_decoder(AVCodecContext *avctx)
avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W'))
context->flip=1;
if(avctx->extradata_size >= 9 && avctx->extradata[4]+28 < avctx->extradata_size && !context->buffer && avctx->pix_fmt == PIX_FMT_UYVY422) {
int ndx = avctx->extradata[4] + 4;
context->interlace = !memcmp(avctx->extradata + ndx, "1:1(", 4);
if(context->interlace) {
context->buffer = av_malloc(context->length);
if (!context->buffer)
return AVERROR(ENOMEM);
context->tff = avctx->extradata[ndx + 24] == 1;
}
}
return 0;
}
@ -173,23 +185,41 @@ static int raw_decode(AVCodecContext *avctx,
if (context->buffer) {
int i;
uint8_t *dst = context->buffer;
buf_size = context->length - AVPALETTE_SIZE;
if (avctx->bits_per_coded_sample == 4){
for(i=0; 2*i+1 < buf_size && i<avpkt->size; i++){
dst[2*i+0]= buf[i]>>4;
dst[2*i+1]= buf[i]&15;
if(avctx->pix_fmt == PIX_FMT_PAL8){
buf_size = context->length - AVPALETTE_SIZE;
if (avctx->bits_per_coded_sample == 4){
for(i=0; 2*i+1 < buf_size && i<avpkt->size; i++){
dst[2*i+0]= buf[i]>>4;
dst[2*i+1]= buf[i]&15;
}
linesize_align = 8;
} else {
av_assert0(avctx->bits_per_coded_sample == 2);
for(i=0; 4*i+3 < buf_size && i<avpkt->size; i++){
dst[4*i+0]= buf[i]>>6;
dst[4*i+1]= buf[i]>>4&3;
dst[4*i+2]= buf[i]>>2&3;
dst[4*i+3]= buf[i] &3;
}
linesize_align = 16;
}
linesize_align = 8;
} else {
av_assert0(avctx->bits_per_coded_sample == 2);
for(i=0; 4*i+3 < buf_size && i<avpkt->size; i++){
dst[4*i+0]= buf[i]>>6;
dst[4*i+1]= buf[i]>>4&3;
dst[4*i+2]= buf[i]>>2&3;
dst[4*i+3]= buf[i] &3;
} else if(context->interlace && avctx->pix_fmt == PIX_FMT_UYVY422) {
int x, y;
int true_height = buf_size / (2*avctx->width);
int tff = !!context->tff;
av_assert0(avctx->height * avctx->width * 2 == context->length);
if (buf_size < context->length) {
av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < context length %d\n", buf_size, context->length);
return AVERROR(EINVAL);
}
linesize_align = 16;
}
buf += (true_height - avctx->height)*avctx->width;
for(y = 0; y < avctx->height-1; y+=2) {
memcpy(dst + (y+ tff)*2*avctx->width, buf , 2*avctx->width);
memcpy(dst + (y+!tff)*2*avctx->width, buf + avctx->width*true_height+4, 2*avctx->width);
buf += 2*avctx->width;
}
}else
av_assert0(0);
buf= dst;
}