* TTA demuxer
* Copyright (c) 2006 Alex Beregszaszi
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavcodec/get_bits.h"
#include "avformat.h"
-#define ALT_BITSREAM_READER_LE
-#include "bitstream.h"
+#include "internal.h"
+#include "id3v1.h"
+#include "libavutil/dict.h"
typedef struct {
int totalframes, currentframe;
- uint32_t *seektable;
+ int frame_size;
+ int last_frame_size;
} 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;
}
-static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int tta_read_header(AVFormatContext *s)
{
TTAContext *c = s->priv_data;
AVStream *st;
- int i, channels, bps, samplerate, datalen, framelen, start;
+ int i, channels, bps, samplerate, datalen;
+ uint64_t framepos, start_offset;
- start = url_ftell(&s->pb);
+ if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
+ ff_id3v1_read(s);
- if (get_le32(&s->pb) != ff_get_fourcc("TTA1"))
+ start_offset = avio_tell(s->pb);
+ if (avio_rl32(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);
+ avio_skip(s->pb, 2); // FIXME: flags
+ channels = avio_rl16(s->pb);
+ bps = avio_rl16(s->pb);
+ samplerate = avio_rl32(s->pb);
if(samplerate <= 0 || samplerate > 1000000){
av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
return -1;
}
- datalen = get_le32(&s->pb);
+ datalen = avio_rl32(s->pb);
if(datalen < 0){
av_log(s, AV_LOG_ERROR, "nonsense datalen\n");
return -1;
}
- url_fskip(&s->pb, 4); // header crc
+ avio_skip(s->pb, 4); // header crc
- framelen = 1.04489795918367346939 * samplerate;
- c->totalframes = datalen / framelen + ((datalen % framelen) ? 1 : 0);
+ c->frame_size = samplerate * 256 / 245;
+ c->last_frame_size = datalen % c->frame_size;
+ if (!c->last_frame_size)
+ c->last_frame_size = c->frame_size;
+ c->totalframes = datalen / c->frame_size + (c->last_frame_size < c->frame_size);
c->currentframe = 0;
if(c->totalframes >= UINT_MAX/sizeof(uint32_t)){
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);
+ st = avformat_new_stream(s, NULL);
if (!st)
- return AVERROR_NOMEM;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_TTA;
+ return AVERROR(ENOMEM);
+
+ avpriv_set_pts_info(st, 64, 1, samplerate);
+ st->start_time = 0;
+ st->duration = datalen;
+
+ framepos = avio_tell(s->pb) + 4*c->totalframes + 4;
+
+ for (i = 0; i < c->totalframes; i++) {
+ uint32_t size = avio_rl32(s->pb);
+ av_add_index_entry(st, framepos, i * c->frame_size, size, 0,
+ AVINDEX_KEYFRAME);
+ framepos += size;
+ }
+ avio_skip(s->pb, 4); // seektable crc
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = AV_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) - start;
+ st->codec->extradata_size = avio_tell(s->pb) - start_offset;
if(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
- //this check is redundant as get_buffer should fail
+ //this check is redundant as avio_read 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, start, SEEK_SET); // or SEEK_CUR and -size ? :)
- get_buffer(&s->pb, st->codec->extradata, st->codec->extradata_size);
+ if (!st->codec->extradata) {
+ st->codec->extradata_size = 0;
+ return AVERROR(ENOMEM);
+ }
+ avio_seek(s->pb, start_offset, SEEK_SET);
+ avio_read(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++;
-
- 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;
+ if (c->currentframe >= c->totalframes)
+ return AVERROR_EOF;
+
+ size = st->index_entries[c->currentframe].size;
+
+ ret = av_get_packet(s->pb, pkt, size);
+ pkt->dts = st->index_entries[c->currentframe++].timestamp;
+ pkt->duration = c->currentframe == c->totalframes ? c->last_frame_size :
+ c->frame_size;
+ 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);
- return 0;
-}
+ AVStream *st = s->streams[stream_index];
+ int index = av_index_search_timestamp(st, timestamp, flags);
+ if (index < 0)
+ return -1;
+ if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
+ return -1;
-AVInputFormat tta_iformat = {
- "tta",
- "true-audio",
- sizeof(TTAContext),
- tta_probe,
- tta_read_header,
- tta_read_packet,
- tta_read_close,
- .extensions = "tta",
-};
+ c->currentframe = index;
-int tta_init(void)
-{
- av_register_input_format(&tta_iformat);
return 0;
}
+
+AVInputFormat ff_tta_demuxer = {
+ .name = "tta",
+ .long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
+ .priv_data_size = sizeof(TTAContext),
+ .read_probe = tta_probe,
+ .read_header = tta_read_header,
+ .read_packet = tta_read_packet,
+ .read_seek = tta_read_seek,
+ .extensions = "tta",
+};
projects / ffmpeg / blobdiff