lavc: export Dirac parsing API used by the ogg demuxer as public

[ffmpeg] / libavformat / mtv.c

diff --git a/libavformat/mtv.c b/libavformat/mtv.c
index 4c3b082881c6359449b9ed3464d4d7012dd8cd15..aad30d7a415c4a1fe1acde22d37568f0e886f0c5 100644 (file)
--- a/libavformat/mtv.c
+++ b/libavformat/mtv.c
@@ -53,7 +53,7 @@ typedef struct MTVDemuxContext {
 static int mtv_probe(AVProbeData *p)
 {
     /* Magic is 'AMV' */
-    if(*(p->buf) != 'A' || *(p->buf+1) != 'M' || *(p->buf+2) != 'V')
+    if (*p->buf != 'A' || *(p->buf + 1) != 'M' || *(p->buf + 2) != 'V')
         return 0;
 
     /* Check for nonzero in bpp and (width|height) header fields */
@@ -64,18 +64,18 @@ static int mtv_probe(AVProbeData *p)
     if(!AV_RL16(&p->buf[52]) || !AV_RL16(&p->buf[54]))
     {
         if(!!AV_RL16(&p->buf[56]))
-            return AVPROBE_SCORE_MAX/2;
+            return AVPROBE_SCORE_EXTENSION;
         else
             return 0;
     }
 
     if(p->buf[51] != 16)
-        return AVPROBE_SCORE_MAX/4; // But we are going to assume 16bpp anyway ..
+        return AVPROBE_SCORE_EXTENSION / 2; // But we are going to assume 16bpp anyway ..
 
     return AVPROBE_SCORE_MAX;
 }
 
-static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int mtv_read_header(AVFormatContext *s)
 {
     MTVDemuxContext *mtv = s->priv_data;
     AVIOContext   *pb  = s->pb;
@@ -96,20 +96,23 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     /* Calculate width and height if missing from header */
 
-    if(!mtv->img_width)
+    if (!mtv->img_width && mtv->img_height > 0 && mtv->img_bpp >= 8)
         mtv->img_width=mtv->img_segment_size / (mtv->img_bpp>>3)
                         / mtv->img_height;
 
-    if(!mtv->img_height)
+    if (!mtv->img_height && mtv->img_width > 0 && mtv->img_bpp >= 8)
         mtv->img_height=mtv->img_segment_size / (mtv->img_bpp>>3)
                         / mtv->img_width;
 
+    if (!mtv->img_width || !mtv->img_height)
+        return AVERROR_INVALIDDATA;
+
     avio_skip(pb, 4);
     audio_subsegments = avio_rl16(pb);
 
     if (audio_subsegments == 0) {
-        av_log_ask_for_sample(s, "MTV files without audio are not supported\n");
-        return AVERROR_INVALIDDATA;
+        avpriv_request_sample(s, "MTV files without audio");
+        return AVERROR_PATCHWELCOME;
     }
 
     mtv->full_segment_size =
@@ -129,11 +132,10 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     avpriv_set_pts_info(st, 64, 1, mtv->video_fps);
     st->codec->codec_type      = AVMEDIA_TYPE_VIDEO;
-    st->codec->codec_id        = CODEC_ID_RAWVIDEO;
-    st->codec->pix_fmt         = PIX_FMT_RGB565;
+    st->codec->codec_id        = AV_CODEC_ID_RAWVIDEO;
+    st->codec->pix_fmt         = AV_PIX_FMT_RGB565BE;
     st->codec->width           = mtv->img_width;
     st->codec->height          = mtv->img_height;
-    st->codec->sample_rate     = mtv->video_fps;
     st->codec->extradata       = av_strdup("BottomUp");
     st->codec->extradata_size  = 9;
 
@@ -145,7 +147,7 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     avpriv_set_pts_info(st, 64, 1, AUDIO_SAMPLING_RATE);
     st->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
-    st->codec->codec_id        = CODEC_ID_MP3;
+    st->codec->codec_id        = AV_CODEC_ID_MP3;
     st->codec->bit_rate        = mtv->audio_br;
     st->need_parsing           = AVSTREAM_PARSE_FULL;
 
@@ -163,11 +165,8 @@ static int mtv_read_packet(AVFormatContext *s, AVPacket *pkt)
     MTVDemuxContext *mtv = s->priv_data;
     AVIOContext *pb = s->pb;
     int ret;
-#if !HAVE_BIGENDIAN
-    int i;
-#endif
 
-    if((avio_tell(pb) - s->data_offset + mtv->img_segment_size) % mtv->full_segment_size)
+    if((avio_tell(pb) - s->internal->data_offset + mtv->img_segment_size) % mtv->full_segment_size)
     {
         avio_skip(pb, MTV_AUDIO_PADDING_SIZE);
 
@@ -184,17 +183,6 @@ static int mtv_read_packet(AVFormatContext *s, AVPacket *pkt)
         if(ret < 0)
             return ret;
 
-#if !HAVE_BIGENDIAN
-
-        /* pkt->data is GGGRRRR BBBBBGGG
-         * and we need RRRRRGGG GGGBBBBB
-         * for PIX_FMT_RGB565 so here we
-         * just swap bytes as they come
-         */
-
-        for(i=0;i<mtv->img_segment_size/2;i++)
-            *((uint16_t *)pkt->data+i) = av_bswap16(*((uint16_t *)pkt->data+i));
-#endif
         pkt->stream_index = 0;
     }
 
@@ -202,8 +190,8 @@ static int mtv_read_packet(AVFormatContext *s, AVPacket *pkt)
 }
 
 AVInputFormat ff_mtv_demuxer = {
-    .name           = "MTV",
-    .long_name      = NULL_IF_CONFIG_SMALL("MTV format"),
+    .name           = "mtv",
+    .long_name      = NULL_IF_CONFIG_SMALL("MTV"),
     .priv_data_size = sizeof(MTVDemuxContext),
     .read_probe     = mtv_probe,
     .read_header    = mtv_read_header,