hook up the XA ADPCM decoder
authorMike Melanson <mike@multimedia.cx>
Wed, 15 Oct 2003 03:53:40 +0000 (03:53 +0000)
committerMike Melanson <mike@multimedia.cx>
Wed, 15 Oct 2003 03:53:40 +0000 (03:53 +0000)
Originally committed as revision 2386 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/psxstr.c

index 3b1933c..f0159c6 100644 (file)
@@ -89,8 +89,11 @@ typedef struct StrDemuxContext {
     int64_t pts;
 
     unsigned char *video_chunk;
+    AVPacket tmp_pkt;
 } StrDemuxContext;
 
+const static char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
+
 static int str_probe(AVProbeData *p)
 {
     int start;
@@ -108,12 +111,7 @@ static int str_probe(AVProbeData *p)
         start = 0;
 
     /* look for CD sync header (00, 0xFF x 10, 00) */
-    if ((p->buf[start + 0] != 0x00) || (p->buf[start + 1] != 0xFF) ||
-        (p->buf[start + 2] != 0xFF) || (p->buf[start + 3] != 0xFF) ||
-        (p->buf[start + 4] != 0xFF) || (p->buf[start + 5] != 0xFF) ||
-        (p->buf[start + 6] != 0xFF) || (p->buf[start + 7] != 0xFF) ||
-        (p->buf[start + 8] != 0xFF) || (p->buf[start + 9] != 0xFF) ||
-        (p->buf[start + 10] != 0xFF) || (p->buf[start + 11] != 0x00))
+    if (memcmp(p->buf+start,sync_header,sizeof(sync_header)))
         return 0;
 
     /* MPEG files (like those ripped from VCDs) can also look like this;
@@ -121,6 +119,17 @@ static int str_probe(AVProbeData *p)
     return 50;
 }
 
+static void dump(unsigned char *buf,size_t len)
+{
+    int i;
+    for(i=0;i<len;i++) {
+        if ((i&15)==0) printf("%04x  ",i);
+        printf("%02x ",buf[i]);
+        if ((i&15)==15) printf("\n");
+    }
+    printf("\n");
+}
+
 static int str_read_header(AVFormatContext *s,
                            AVFormatParameters *ap)
 {
@@ -157,6 +166,8 @@ static int str_read_header(AVFormatContext *s,
         if (get_buffer(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
             return AVERROR_IO;
 
+//printf("%02x %02x %02x %02x\n",sector[0x10],sector[0x11],sector[0x12],sector[0x13]);
+
         channel = sector[0x11];
         if (channel >= 32)
             return AVERROR_INVALIDDATA;
@@ -193,6 +204,7 @@ static int str_read_header(AVFormatContext *s,
         case CDXA_TYPE_AUDIO:
             /* check if this channel gets to be the dominant audio channel */
             if (str->audio_channel == -1) {
+                int fmt;
                 str->audio_channel = channel;
                 str->channels[channel].type = STR_AUDIO;
                 str->channels[channel].channels = 
@@ -201,6 +213,22 @@ static int str_read_header(AVFormatContext *s,
                     (sector[0x13] & 0x04) ? 18900 : 37800;
                 str->channels[channel].bits = 
                     (sector[0x13] & 0x10) ? 8 : 4;
+
+                /* allocate a new AVStream */
+                st = av_new_stream(s, 0);
+                if (!st)
+                    return AVERROR_NOMEM;
+
+                str->channels[channel].audio_stream_index = st->index;
+
+                fmt = sector[0x13];
+                st->codec.codec_type = CODEC_TYPE_AUDIO;
+                st->codec.codec_id = CODEC_ID_ADPCM_XA; 
+                st->codec.codec_tag = 0;  /* no fourcc */
+                st->codec.channels = (fmt&1)?2:1;
+                st->codec.sample_rate = (fmt&4)?18900:37800;
+            //    st->codec.bit_rate = 0; //FIXME;
+                st->codec.block_align = 128;
             }
             break;
 
@@ -211,15 +239,15 @@ static int str_read_header(AVFormatContext *s,
     }
 
 if (str->video_channel != -1)
-  printf (" video channel = %d, %d x %d\n", str->video_channel,
+  printf (" video channel = %d, %d x %d %d\n", str->video_channel,
     str->channels[str->video_channel].width,
-    str->channels[str->video_channel].height);
+    str->channels[str->video_channel].height,str->channels[str->video_channel].video_stream_index);
 if (str->audio_channel != -1)
-  printf (" audio channel = %d, %d Hz, %d channels, %d bits/sample\n", 
-    str->video_channel,
-    str->channels[str->video_channel].sample_rate,
-    str->channels[str->video_channel].channels,
-    str->channels[str->video_channel].bits);
+  printf (" audio channel = %d, %d Hz, %d channels, %d bits/sample %d\n", 
+    str->audio_channel,
+    str->channels[str->audio_channel].sample_rate,
+    str->channels[str->audio_channel].channels,
+    str->channels[str->audio_channel].bits,str->channels[str->audio_channel].audio_stream_index);
 
     /* back to the start */
     url_fseek(pb, start, SEEK_SET);
@@ -228,19 +256,15 @@ if (str->audio_channel != -1)
 }
 
 static int str_read_packet(AVFormatContext *s,
-                           AVPacket *pkt)
+                           AVPacket *ret_pkt)
 {
     ByteIOContext *pb = &s->pb;
     StrDemuxContext *str = (StrDemuxContext *)s->priv_data;
     unsigned char sector[RAW_CD_SECTOR_SIZE];
     int channel;
     int packet_read = 0;
-    int video_sector_count = 0;
-    int current_video_sector = 0;
-    int video_frame_size = 0;
-    int video_frame_index = 0;
-    int bytes_to_copy;
     int ret = 0;
+    AVPacket *pkt;
 
     while (!packet_read) {
 
@@ -258,16 +282,20 @@ static int str_read_packet(AVFormatContext *s,
             /* check if this the video channel we care about */
             if (channel == str->video_channel) {
 
+                int current_sector = LE_16(&sector[0x1C]);
+                int sector_count   = LE_16(&sector[0x1E]);
+                int frame_size = LE_32(&sector[0x24]);
+                int bytes_to_copy;
+//        printf("%d %d %d\n",current_sector,sector_count,frame_size);
                 /* if this is the first sector of the frame, allocate a pkt */
-                if (current_video_sector == 0) {
-                    video_frame_size = LE_32(&sector[0x24]);
-                    video_sector_count = LE_16(&sector[0x1E]);
-                    if (av_new_packet(pkt, video_frame_size))
+                pkt = &str->tmp_pkt;
+                if (current_sector == 0) {
+                    if (av_new_packet(pkt, frame_size))
                         return -EIO;
 
                     pkt->stream_index = 
                         str->channels[channel].video_stream_index;
-                    pkt->pts = str->pts;
+               //     pkt->pts = str->pts;
 
                     /* if there is no audio, adjust the pts after every video
                      * frame; assume 15 fps */
@@ -276,32 +304,16 @@ static int str_read_packet(AVFormatContext *s,
                 }
 
                 /* load all the constituent chunks in the video packet */
-                if (video_frame_size - video_frame_index < VIDEO_DATA_CHUNK_SIZE)
-                    bytes_to_copy = video_frame_size - video_frame_index;
-                else
-                    bytes_to_copy = VIDEO_DATA_CHUNK_SIZE;
-                if (video_frame_index < video_frame_size)
-                    memcpy(&pkt->data[video_frame_index],
-                        &sector[VIDEO_DATA_HEADER_SIZE], bytes_to_copy);
-
-#ifdef PRINTSTUFF
-printf ("  chunk %d/%d (bytes %d/%d), first 6 bytes = %02X %02X %02X %02X %02X %02X\n",
-  current_video_sector, video_sector_count,
-  video_frame_index, video_frame_size,
-  pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 0],
-  pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 1],
-  pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 2],
-  pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 3],
-  pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 4],
-  pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 5]);
-#endif
-
-                video_frame_index += bytes_to_copy;
-                /* must keep reading sectors until all current video sectors
-                 * are consumed */
-                current_video_sector++;
-                if (current_video_sector >= video_sector_count)
-                    packet_read = 1;
+                bytes_to_copy = frame_size - current_sector*VIDEO_DATA_CHUNK_SIZE;
+                if (bytes_to_copy>0) {
+                    if (bytes_to_copy>VIDEO_DATA_CHUNK_SIZE) bytes_to_copy=VIDEO_DATA_CHUNK_SIZE;
+                    memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
+                        sector + VIDEO_DATA_HEADER_SIZE, bytes_to_copy);
+                }
+                if (current_sector == sector_count-1) {
+                    *ret_pkt = *pkt;
+                    return 0;
+                }
 
             }
             break;
@@ -310,7 +322,21 @@ printf ("  chunk %d/%d (bytes %d/%d), first 6 bytes = %02X %02X %02X %02X %02X %
 #ifdef PRINTSTUFF
 printf (" dropping audio sector\n");
 #endif
-        break;
+#if 1
+            /* check if this the video channel we care about */
+            if (channel == str->audio_channel) {
+                pkt = ret_pkt;
+                if (av_new_packet(pkt, 2304))
+                    return -EIO;
+                memcpy(pkt->data,sector+24,2304);
+
+                pkt->stream_index = 
+                    str->channels[channel].audio_stream_index;
+                //pkt->pts = str->pts;
+                return 0;
+            }
+#endif
+            break;
         default:
             /* drop the sector and move on */
 #ifdef PRINTSTUFF