X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Ftta.c;h=4b9be6cf30bf22bb5f383060725722980a34d03a;hb=5b21bdabe43611385d1d55a21d5b1f607b133d29;hp=663cd1b6e960a849d29f2f6e73789ef225dc377a;hpb=09a628662dbe068d4902a910ac630260fd321efa;p=ffmpeg

diff --git a/libavformat/tta.c b/libavformat/tta.c
index 663cd1b6e96..4b9be6cf30b 100644
--- a/libavformat/tta.c
+++ b/libavformat/tta.c
@@ -16,21 +16,18 @@
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
 #include "bitstream.h"
 
 typedef struct {
     int totalframes, currentframe;
-    uint32_t *seektable;
 } TTAContext;
 
 static int tta_probe(AVProbeData *p)
 {
     const uint8_t *d = p->buf;
-    if (p->buf_size < 4)
-        return 0;
     if (d[0] == 'T' && d[1] == 'T' && d[2] == 'A' && d[3] == '1')
         return 80;
     return 0;
@@ -41,6 +38,7 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
     TTAContext *c = s->priv_data;
     AVStream *st;
     int i, channels, bps, samplerate, datalen, framelen;
+    uint64_t framepos;
 
     if (get_le32(&s->pb) != ff_get_fourcc("TTA1"))
         return -1; // not tta file
@@ -70,18 +68,24 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
         av_log(s, AV_LOG_ERROR, "totalframes too large\n");
         return -1;
     }
-    c->seektable = av_mallocz(sizeof(uint32_t)*c->totalframes);
-    if (!c->seektable)
-        return AVERROR_NOMEM;
-
-    for (i = 0; i < c->totalframes; i++)
-            c->seektable[i] = get_le32(&s->pb);
-    url_fskip(&s->pb, 4); // seektable crc
 
     st = av_new_stream(s, 0);
-//    av_set_pts_info(st, 32, 1, 1000);
     if (!st)
-        return AVERROR_NOMEM;
+        return AVERROR(ENOMEM);
+
+    av_set_pts_info(st, 64, 1, samplerate);
+    st->start_time = 0;
+    st->duration = datalen;
+
+    framepos = url_ftell(&s->pb) + 4*c->totalframes + 4;
+
+    for (i = 0; i < c->totalframes; i++) {
+        uint32_t size = get_le32(&s->pb);
+        av_add_index_entry(st, framepos, i*framelen, size, 0, AVINDEX_KEYFRAME);
+        framepos += size;
+    }
+    url_fskip(&s->pb, 4); // seektable crc
+
     st->codec->codec_type = CODEC_TYPE_AUDIO;
     st->codec->codec_id = CODEC_ID_TTA;
     st->codec->channels = channels;
@@ -104,37 +108,31 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
 static int tta_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     TTAContext *c = s->priv_data;
-    int ret, size;
+    AVStream *st = s->streams[0];
+    int size, ret;
 
     // FIXME!
     if (c->currentframe > c->totalframes)
-        size = 0;
-    else
-        size = c->seektable[c->currentframe];
-
-    c->currentframe++;
+        return -1;
 
-    if (av_new_packet(pkt, size) < 0)
-        return AVERROR_IO;
+    size = st->index_entries[c->currentframe].size;
 
-    pkt->pos = url_ftell(&s->pb);
-    pkt->stream_index = 0;
-    ret = get_buffer(&s->pb, pkt->data, size);
-    if (ret <= 0) {
-        av_free_packet(pkt);
-        return AVERROR_IO;
-    }
-    pkt->size = ret;
-//    av_log(s, AV_LOG_INFO, "TTA packet #%d desired size: %d read size: %d at pos %d\n",
-//        c->currentframe, size, ret, pkt->pos);
-    return 0; //ret;
+    ret = av_get_packet(&s->pb, pkt, size);
+    pkt->dts = st->index_entries[c->currentframe++].timestamp;
+    return ret;
 }
 
-static int tta_read_close(AVFormatContext *s)
+static int tta_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 {
     TTAContext *c = s->priv_data;
-    if (c->seektable)
-        av_free(c->seektable);
+    AVStream *st = s->streams[stream_index];
+    int index = av_index_search_timestamp(st, timestamp, flags);
+    if (index < 0)
+        return -1;
+
+    c->currentframe = index;
+    url_fseek(&s->pb, st->index_entries[index].pos, SEEK_SET);
+
     return 0;
 }
 
@@ -145,6 +143,7 @@ AVInputFormat tta_demuxer = {
     tta_probe,
     tta_read_header,
     tta_read_packet,
-    tta_read_close,
+    NULL,
+    tta_read_seek,
     .extensions = "tta",
 };