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/*
* RAW PCM demuxers
* Copyright (c) 2002 Fabrice Bellard
*
* 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 "avformat.h"
#include "rawdec.h"
#include "pcm.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/avassert.h"
#define RAW_SAMPLES 1024
static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, size, bps;
// AVStream *st = s->streams[0];
size= RAW_SAMPLES*s->streams[0]->codec->block_align;
ret= av_get_packet(s->pb, pkt, size);
pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
pkt->stream_index = 0;
if (ret < 0)
return ret;
bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
av_assert1(bps); // if false there IS a bug elsewhere (NOT in this function)
pkt->dts=
pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
return ret;
}
static const AVOption pcm_options[] = {
{ "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "channels", "", offsetof(RawAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
};
#define PCMDEF(name_, long_name_, ext, codec) \
static const AVClass name_ ## _demuxer_class = { \
.class_name = #name_ " demuxer", \
.item_name = av_default_item_name, \
.option = pcm_options, \
.version = LIBAVUTIL_VERSION_INT, \
}; \
AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
.name = #name_, \
.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
.priv_data_size = sizeof(RawAudioDemuxerContext), \
.read_header = ff_raw_read_header, \
.read_packet = raw_read_packet, \
.read_seek = ff_pcm_read_seek, \
.flags = AVFMT_GENERIC_INDEX, \
.extensions = ext, \
.raw_codec_id = codec, \
.priv_class = &name_ ## _demuxer_class, \
};
PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",
NULL, CODEC_ID_PCM_F64BE)
PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",
NULL, CODEC_ID_PCM_F64LE)
PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",
NULL, CODEC_ID_PCM_F32BE)
PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",
NULL, CODEC_ID_PCM_F32LE)
PCMDEF(s32be, "PCM signed 32 bit big-endian format",
NULL, CODEC_ID_PCM_S32BE)
PCMDEF(s32le, "PCM signed 32 bit little-endian format",
NULL, CODEC_ID_PCM_S32LE)
PCMDEF(s24be, "PCM signed 24 bit big-endian format",
NULL, CODEC_ID_PCM_S24BE)
PCMDEF(s24le, "PCM signed 24 bit little-endian format",
NULL, CODEC_ID_PCM_S24LE)
PCMDEF(s16be, "PCM signed 16 bit big-endian format",
AV_NE("sw", NULL), CODEC_ID_PCM_S16BE)
PCMDEF(s16le, "PCM signed 16 bit little-endian format",
AV_NE(NULL, "sw"), CODEC_ID_PCM_S16LE)
PCMDEF(s8, "PCM signed 8 bit format",
"sb", CODEC_ID_PCM_S8)
PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",
NULL, CODEC_ID_PCM_U32BE)
PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",
NULL, CODEC_ID_PCM_U32LE)
PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",
NULL, CODEC_ID_PCM_U24BE)
PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",
NULL, CODEC_ID_PCM_U24LE)
PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
AV_NE("uw", NULL), CODEC_ID_PCM_U16BE)
PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
AV_NE(NULL, "uw"), CODEC_ID_PCM_U16LE)
PCMDEF(u8, "PCM unsigned 8 bit format",
"ub", CODEC_ID_PCM_U8)
PCMDEF(alaw, "PCM A-law format",
"al", CODEC_ID_PCM_ALAW)
PCMDEF(mulaw, "PCM mu-law format",
"ul", CODEC_ID_PCM_MULAW)
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