avio: avio_ prefix for url_fsize
[ffmpeg.git] / libavformat / vocdec.c
index 8ad6909..f4fb8cc 100644 (file)
@@ -19,7 +19,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/intreadwrite.h"
 #include "voc.h"
+#include "internal.h"
 
 
 static int voc_probe(AVProbeData *p)
@@ -39,21 +41,21 @@ static int voc_probe(AVProbeData *p)
 static int voc_read_header(AVFormatContext *s, AVFormatParameters *ap)
 {
     VocDecContext *voc = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     int header_size;
     AVStream *st;
 
-    url_fskip(pb, 20);
-    header_size = get_le16(pb) - 22;
+    avio_seek(pb, 20, SEEK_CUR);
+    header_size = avio_rl16(pb) - 22;
     if (header_size != 4) {
         av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size);
         return AVERROR(ENOSYS);
     }
-    url_fskip(pb, header_size);
+    avio_seek(pb, header_size, SEEK_CUR);
     st = av_new_stream(s, 0);
     if (!st)
         return AVERROR(ENOMEM);
-    st->codec->codec_type = CODEC_TYPE_AUDIO;
+    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
 
     voc->remaining_size = 0;
     return 0;
@@ -64,26 +66,31 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
 {
     VocDecContext *voc = s->priv_data;
     AVCodecContext *dec = st->codec;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     VocType type;
-    int size;
+    int size, tmp_codec=-1;
     int sample_rate = 0;
     int channels = 1;
 
     while (!voc->remaining_size) {
-        type = get_byte(pb);
+        type = avio_r8(pb);
         if (type == VOC_TYPE_EOF)
             return AVERROR(EIO);
-        voc->remaining_size = get_le24(pb);
+        voc->remaining_size = avio_rl24(pb);
+        if (!voc->remaining_size) {
+            if (url_is_streamed(s->pb))
+                return AVERROR(EIO);
+            voc->remaining_size = avio_size(pb) - avio_tell(pb);
+        }
         max_size -= 4;
 
         switch (type) {
         case VOC_TYPE_VOICE_DATA:
-            dec->sample_rate = 1000000 / (256 - get_byte(pb));
+            dec->sample_rate = 1000000 / (256 - avio_r8(pb));
             if (sample_rate)
                 dec->sample_rate = sample_rate;
             dec->channels = channels;
-            dec->codec_id = codec_get_id(ff_voc_codec_tags, get_byte(pb));
+            tmp_codec = avio_r8(pb);
             dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id);
             voc->remaining_size -= 2;
             max_size -= 2;
@@ -94,32 +101,47 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
             break;
 
         case VOC_TYPE_EXTENDED:
-            sample_rate = get_le16(pb);
-            get_byte(pb);
-            channels = get_byte(pb) + 1;
+            sample_rate = avio_rl16(pb);
+            avio_r8(pb);
+            channels = avio_r8(pb) + 1;
             sample_rate = 256000000 / (channels * (65536 - sample_rate));
             voc->remaining_size = 0;
             max_size -= 4;
             break;
 
         case VOC_TYPE_NEW_VOICE_DATA:
-            dec->sample_rate = get_le32(pb);
-            dec->bits_per_coded_sample = get_byte(pb);
-            dec->channels = get_byte(pb);
-            dec->codec_id = codec_get_id(ff_voc_codec_tags, get_le16(pb));
-            url_fskip(pb, 4);
+            dec->sample_rate = avio_rl32(pb);
+            dec->bits_per_coded_sample = avio_r8(pb);
+            dec->channels = avio_r8(pb);
+            tmp_codec = avio_rl16(pb);
+            avio_seek(pb, 4, SEEK_CUR);
             voc->remaining_size -= 12;
             max_size -= 12;
             break;
 
         default:
-            url_fskip(pb, voc->remaining_size);
+            avio_seek(pb, voc->remaining_size, SEEK_CUR);
             max_size -= voc->remaining_size;
             voc->remaining_size = 0;
             break;
         }
     }
 
+    if (tmp_codec >= 0) {
+        tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
+        if (dec->codec_id == CODEC_ID_NONE)
+            dec->codec_id = tmp_codec;
+        else if (dec->codec_id != tmp_codec)
+            av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
+        if (dec->codec_id == CODEC_ID_NONE) {
+            if (s->audio_codec_id == CODEC_ID_NONE) {
+                av_log(s, AV_LOG_ERROR, "unknown codec tag\n");
+                return AVERROR(EINVAL);
+            }
+            av_log(s, AV_LOG_WARNING, "unknown codec tag\n");
+        }
+    }
+
     dec->bit_rate = dec->sample_rate * dec->bits_per_coded_sample;
 
     if (max_size <= 0)
@@ -134,7 +156,7 @@ static int voc_read_packet(AVFormatContext *s, AVPacket *pkt)
     return voc_get_packet(s, pkt, s->streams[0], 0);
 }
 
-AVInputFormat voc_demuxer = {
+AVInputFormat ff_voc_demuxer = {
     "voc",
     NULL_IF_CONFIG_SMALL("Creative Voice file format"),
     sizeof(VocDecContext),