split rm muxer and demuxer in their own files

[ffmpeg] / libavformat / mpc.c

diff --git a/libavformat/mpc.c b/libavformat/mpc.c
index 1c941d8159eef2b4e0f6f5fe865048905017795e..5e75f16334996238b1cd2cab1e5e10c636c021fd 100644 (file)
--- a/libavformat/mpc.c
+++ b/libavformat/mpc.c
@@ -22,6 +22,7 @@
 #include "bitstream.h"
 
 #define MPC_FRAMESIZE  1152
+#define DELAY_FRAMES   32
 
 static const int mpc_rate[4] = { 44100, 48000, 37800, 32000 };
 typedef struct {
@@ -41,10 +42,10 @@ typedef struct {
 static int mpc_probe(AVProbeData *p)
 {
     const uint8_t *d = p->buf;
-    if (p->buf_size < 32)
-        return 0;
     if (d[0] == 'M' && d[1] == 'P' && d[2] == '+' && (d[3] == 0x17 || d[3] == 0x7))
         return AVPROBE_SCORE_MAX;
+    if (d[0] == 'I' && d[1] == 'D' && d[2] == '3')
+        return AVPROBE_SCORE_MAX / 2;
     return 0;
 }
 
@@ -52,10 +53,26 @@ static int mpc_read_header(AVFormatContext *s, AVFormatParameters *ap)
 {
     MPCContext *c = s->priv_data;
     AVStream *st;
+    int t;
 
-    if(get_le24(&s->pb) != MKTAG('M', 'P', '+', 0)){
-        av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
-        return -1;
+    t = get_le24(&s->pb);
+    if(t != MKTAG('M', 'P', '+', 0)){
+        if(t != MKTAG('I', 'D', '3', 0)){
+            av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
+            return -1;
+        }
+        /* skip ID3 tags and try again */
+        url_fskip(&s->pb, 3);
+        t  = get_byte(&s->pb) << 21;
+        t |= get_byte(&s->pb) << 14;
+        t |= get_byte(&s->pb) <<  7;
+        t |= get_byte(&s->pb);
+        av_log(s, AV_LOG_DEBUG, "Skipping %d(%X) bytes of ID3 data\n", t, t);
+        url_fskip(&s->pb, t);
+        if(get_le24(&s->pb) != MKTAG('M', 'P', '+', 0)){
+            av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
+            return -1;
+        }
     }
     c->ver = get_byte(&s->pb);
     if(c->ver != 0x07 && c->ver != 0x17){
@@ -99,7 +116,7 @@ static int mpc_read_packet(AVFormatContext *s, AVPacket *pkt)
     int ret, size, size2, curbits, cur = c->curframe;
     int64_t tmp, pos;
 
-    if (c->curframe > c->fcount)
+    if (c->curframe >= c->fcount)
         return -1;
 
     if(c->curframe != c->lastframe + 1){
@@ -137,6 +154,7 @@ static int mpc_read_packet(AVFormatContext *s, AVPacket *pkt)
     pkt->data[1] = (c->curframe > c->fcount);
 
     pkt->stream_index = 0;
+    pkt->pts = cur;
     ret = get_buffer(&s->pb, pkt->data + 4, size);
     if(c->curbits)
         url_fseek(&s->pb, -4, SEEK_CUR);
@@ -170,7 +188,7 @@ static int mpc_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
     MPCContext *c = s->priv_data;
     AVPacket pkt1, *pkt = &pkt1;
     int ret;
-    int index = av_index_search_timestamp(st, timestamp, flags);
+    int index = av_index_search_timestamp(st, timestamp - DELAY_FRAMES, flags);
     uint32_t lastframe;
 
     /* if found, seek there */
@@ -181,6 +199,7 @@ static int mpc_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
     /* if timestamp is out of bounds, return error */
     if(timestamp < 0 || timestamp >= c->fcount)
         return -1;
+    timestamp -= DELAY_FRAMES;
     /* seek to the furthest known position and read packets until
        we reach desired position */
     lastframe = c->curframe;