*/
#include "libavutil/bswap.h"
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
#define MTV_ASUBCHUNK_DATA_SIZE 500
unsigned int file_size; ///< filesize, not always right
unsigned int segments; ///< number of 512 byte segments
unsigned int audio_identifier; ///< 'MP3' on all files I have seen
- unsigned int audio_br; ///< bitrate of audio chanel (mp3)
+ unsigned int audio_br; ///< bitrate of audio channel (mp3)
unsigned int img_colorfmt; ///< frame colorfmt rgb 565/555
unsigned int img_bpp; ///< frame bits per pixel
unsigned int img_width; //
if(*(p->buf) != 'A' || *(p->buf+1) != 'M' || *(p->buf+2) != 'V')
return 0;
+ /* Check for nonzero in bpp and (width|height) header fields */
+ if(!(p->buf[51] && AV_RL16(&p->buf[52]) | AV_RL16(&p->buf[54])))
+ return 0;
+
+ /* If width or height are 0 then imagesize header field should not */
+ if(!AV_RL16(&p->buf[52]) || !AV_RL16(&p->buf[54]))
+ {
+ if(!!AV_RL16(&p->buf[56]))
+ return AVPROBE_SCORE_MAX/2;
+ else
+ return 0;
+ }
+
+ if(p->buf[51] != 16)
+ return AVPROBE_SCORE_MAX/4; // But we are going to assume 16bpp anyway ..
+
return AVPROBE_SCORE_MAX;
}
mtv->img_width = get_le16(pb);
mtv->img_height = get_le16(pb);
mtv->img_segment_size = get_le16(pb);
+
+ /* Calculate width and height if missing from header */
+
+ if(!mtv->img_width)
+ mtv->img_width=mtv->img_segment_size / (mtv->img_bpp>>3)
+ / mtv->img_height;
+
+ if(!mtv->img_height)
+ mtv->img_height=mtv->img_segment_size / (mtv->img_bpp>>3)
+ / mtv->img_width;
+
url_fskip(pb, 4);
audio_subsegments = get_le16(pb);
mtv->full_segment_size =
url_fskip(pb, MTV_AUDIO_PADDING_SIZE);
ret = av_get_packet(pb, pkt, MTV_ASUBCHUNK_DATA_SIZE);
- if(ret != MTV_ASUBCHUNK_DATA_SIZE)
- return AVERROR(EIO);
+ if(ret < 0)
+ return ret;
pkt->pos -= MTV_AUDIO_PADDING_SIZE;
pkt->stream_index = AUDIO_SID;
}else
{
ret = av_get_packet(pb, pkt, mtv->img_segment_size);
- if(ret != mtv->img_segment_size)
- return AVERROR(EIO);
+ if(ret < 0)
+ return ret;
#if !HAVE_BIGENDIAN