rtpproto: Add an option for writing return packets to the address of the last receive...

[ffmpeg] / libavformat / mtv.c

diff --git a/libavformat/mtv.c b/libavformat/mtv.c
index 16e4c90eebdee17b11beb3c18bc2114b961d7d70..ed250bccc31415c70c3853d5950e6162ac1ba968 100644 (file)
--- a/libavformat/mtv.c
+++ b/libavformat/mtv.c
@@ -27,6 +27,7 @@
 #include "libavutil/bswap.h"
 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
+#include "internal.h"
 
 #define MTV_ASUBCHUNK_DATA_SIZE 500
 #define MTV_HEADER_SIZE 512
@@ -52,7 +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 */
@@ -63,18 +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;
@@ -105,6 +106,12 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     avio_skip(pb, 4);
     audio_subsegments = avio_rl16(pb);
+
+    if (audio_subsegments == 0) {
+        avpriv_request_sample(s, "MTV files without audio");
+        return AVERROR_PATCHWELCOME;
+    }
+
     mtv->full_segment_size =
         audio_subsegments * (MTV_AUDIO_PADDING_SIZE + MTV_ASUBCHUNK_DATA_SIZE) +
         mtv->img_segment_size;
@@ -120,10 +127,10 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if(!st)
         return AVERROR(ENOMEM);
 
-    av_set_pts_info(st, 64, 1, mtv->video_fps);
+    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;
@@ -136,9 +143,9 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if(!st)
         return AVERROR(ENOMEM);
 
-    av_set_pts_info(st, 64, 1, AUDIO_SAMPLING_RATE);
+    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;
 
@@ -156,9 +163,6 @@ 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)
     {
@@ -177,17 +181,6 @@ 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;
     }
 
@@ -195,8 +188,8 @@ 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,