mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-28 20:26:14 +02:00
![James Almer](/assets/img/avatar_default.png)
* commit '83548fe894cdb455cc127f754d09905b6d23c173': lavf: fix usage of AVIOContext.seekable Merged-by: James Almer <jamrial@gmail.com>
147 lines
4.7 KiB
C
147 lines
4.7 KiB
C
/*
|
|
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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,
|
|
* 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
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "voc.h"
|
|
|
|
int
|
|
ff_voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
|
|
{
|
|
VocDecContext *voc = s->priv_data;
|
|
AVCodecParameters *par = st->codecpar;
|
|
AVIOContext *pb = s->pb;
|
|
VocType type;
|
|
int size, tmp_codec=-1;
|
|
int sample_rate = 0;
|
|
int channels = 1;
|
|
int64_t duration;
|
|
int ret;
|
|
|
|
av_add_index_entry(st,
|
|
avio_tell(pb),
|
|
voc->pts,
|
|
voc->remaining_size,
|
|
0,
|
|
AVINDEX_KEYFRAME);
|
|
|
|
while (!voc->remaining_size) {
|
|
type = avio_r8(pb);
|
|
if (type == VOC_TYPE_EOF)
|
|
return AVERROR_EOF;
|
|
voc->remaining_size = avio_rl24(pb);
|
|
if (!voc->remaining_size) {
|
|
if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
|
|
return AVERROR(EIO);
|
|
voc->remaining_size = avio_size(pb) - avio_tell(pb);
|
|
}
|
|
max_size -= 4;
|
|
|
|
switch (type) {
|
|
case VOC_TYPE_VOICE_DATA:
|
|
if (!par->sample_rate) {
|
|
par->sample_rate = 1000000 / (256 - avio_r8(pb));
|
|
if (sample_rate)
|
|
par->sample_rate = sample_rate;
|
|
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
|
|
par->channels = channels;
|
|
par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id);
|
|
} else
|
|
avio_skip(pb, 1);
|
|
tmp_codec = avio_r8(pb);
|
|
voc->remaining_size -= 2;
|
|
max_size -= 2;
|
|
channels = 1;
|
|
break;
|
|
|
|
case VOC_TYPE_VOICE_DATA_CONT:
|
|
break;
|
|
|
|
case VOC_TYPE_EXTENDED:
|
|
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:
|
|
if (!par->sample_rate) {
|
|
par->sample_rate = avio_rl32(pb);
|
|
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
|
|
par->bits_per_coded_sample = avio_r8(pb);
|
|
par->channels = avio_r8(pb);
|
|
} else
|
|
avio_skip(pb, 6);
|
|
tmp_codec = avio_rl16(pb);
|
|
avio_skip(pb, 4);
|
|
voc->remaining_size -= 12;
|
|
max_size -= 12;
|
|
break;
|
|
|
|
default:
|
|
avio_skip(pb, voc->remaining_size);
|
|
max_size -= voc->remaining_size;
|
|
voc->remaining_size = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (par->sample_rate <= 0) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", par->sample_rate);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (tmp_codec >= 0) {
|
|
tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
|
|
if (par->codec_id == AV_CODEC_ID_NONE)
|
|
par->codec_id = tmp_codec;
|
|
else if (par->codec_id != tmp_codec)
|
|
av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
|
|
if (par->codec_id == AV_CODEC_ID_NONE) {
|
|
if (s->audio_codec_id == AV_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");
|
|
}
|
|
}
|
|
|
|
par->bit_rate = (int64_t)par->sample_rate * par->channels * par->bits_per_coded_sample;
|
|
|
|
if (max_size <= 0)
|
|
max_size = 2048;
|
|
size = FFMIN(voc->remaining_size, max_size);
|
|
voc->remaining_size -= size;
|
|
|
|
ret = av_get_packet(pb, pkt, size);
|
|
pkt->dts = pkt->pts = voc->pts;
|
|
|
|
duration = av_get_audio_frame_duration2(st->codecpar, size);
|
|
if (duration > 0 && voc->pts != AV_NOPTS_VALUE)
|
|
voc->pts += duration;
|
|
else
|
|
voc->pts = AV_NOPTS_VALUE;
|
|
|
|
return ret;
|
|
}
|