*
* 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 "libavcodec/bitstream.h"
#include "avformat.h"
-#include "bitstream.h"
typedef struct {
int totalframes, currentframe;
- uint32_t *seektable;
} TTAContext;
static int tta_probe(AVProbeData *p)
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"))
+ if (get_le32(s->pb) != AV_RL32("TTA1"))
return -1; // not tta file
- url_fskip(&s->pb, 2); // FIXME: flags
- channels = get_le16(&s->pb);
- bps = get_le16(&s->pb);
- samplerate = get_le32(&s->pb);
+ url_fskip(s->pb, 2); // FIXME: flags
+ channels = get_le16(s->pb);
+ bps = get_le16(s->pb);
+ samplerate = get_le32(s->pb);
if(samplerate <= 0 || samplerate > 1000000){
av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
return -1;
}
- datalen = get_le32(&s->pb);
+ datalen = get_le32(s->pb);
if(datalen < 0){
av_log(s, AV_LOG_ERROR, "nonsense datalen\n");
return -1;
}
- url_fskip(&s->pb, 4); // header crc
+ url_fskip(s->pb, 4); // header crc
framelen = samplerate*256/245;
c->totalframes = datalen / framelen + ((datalen % framelen) ? 1 : 0);
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;
st->codec->sample_rate = samplerate;
- st->codec->bits_per_sample = bps;
+ st->codec->bits_per_coded_sample = bps;
- st->codec->extradata_size = url_ftell(&s->pb);
+ st->codec->extradata_size = url_ftell(s->pb);
if(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
//this check is redundant as get_buffer should fail
av_log(s, AV_LOG_ERROR, "extradata_size too large\n");
return -1;
}
st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
- url_fseek(&s->pb, 0, SEEK_SET);
- get_buffer(&s->pb, st->codec->extradata, st->codec->extradata_size);
+ url_fseek(s->pb, 0, SEEK_SET);
+ get_buffer(s->pb, st->codec->extradata, st->codec->extradata_size);
return 0;
}
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;
}
AVInputFormat tta_demuxer = {
"tta",
- "true-audio",
+ NULL_IF_CONFIG_SMALL("True Audio"),
sizeof(TTAContext),
tta_probe,
tta_read_header,
tta_read_packet,
- tta_read_close,
+ NULL,
+ tta_read_seek,
.extensions = "tta",
};