From 0de4918f32ffbc43d205c924301515585d71068b Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 18 Aug 2012 04:03:03 +0200 Subject: rawdec: support AVRn 1:1 raw interlaced mode Fixes Ticket971 Signed-off-by: Michael Niedermayer --- libavcodec/rawdec.c | 60 +++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 45 insertions(+), 15 deletions(-) diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c index 9920e7875e..9e2fbaafbe 100644 --- a/libavcodec/rawdec.c +++ b/libavcodec/rawdec.c @@ -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 && isize; 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 && isize; 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 && isize; 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 && isize; 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; } -- cgit v1.2.3