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Change from using a seek table internal to the TTA demuxer to using the standard lavf index.

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Originally committed as revision 8780 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2007-04-22 00:50:36 +00:00
parent 6b30123208
commit 756fb7fea1
1 changed files with 21 additions and 37 deletions
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58
libavformat/tta.c
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@ -23,7 +23,6 @@
typedef struct {
int totalframes, currentframe;
uint32_t *seektable;
} TTAContext;
static int tta_probe(AVProbeData *p)
@ -39,6 +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
@ -68,18 +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;
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;
@ -102,38 +108,16 @@ 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;
// FIXME!
if (c->currentframe > c->totalframes)
size = 0;
else
size = c->seektable[c->currentframe];
return -1;
c->currentframe++;
size = st->index_entries[c->currentframe++].size;
if (av_new_packet(pkt, size) < 0)
return AVERROR_IO;
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;
}
static int tta_read_close(AVFormatContext *s)
{
TTAContext *c = s->priv_data;
if (c->seektable)
av_free(c->seektable);
return 0;
return av_get_packet(&s->pb, pkt, size);
}
AVInputFormat tta_demuxer = {
@ -143,6 +127,6 @@ AVInputFormat tta_demuxer = {
tta_probe,
tta_read_header,
tta_read_packet,
tta_read_close,
NULL,
.extensions = "tta",
};