* Creative Voice File demuxer.
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* 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)
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_skip(pb, 20);
+ 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_skip(pb, header_size);
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;
{
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 (!s->pb->seekable)
+ 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 = ff_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;
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 = ff_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_skip(pb, 4);
voc->remaining_size -= 12;
max_size -= 12;
break;
default:
- url_fskip(pb, voc->remaining_size);
+ avio_skip(pb, voc->remaining_size);
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)
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),