mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/*
|
|
* RAW PCM demuxers
|
|
* Copyright (c) 2002 Fabrice Bellard
|
|
*
|
|
* 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 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* 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 Libav; 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"
|
|
|
|
#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->stream_index = 0;
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
|
|
assert(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), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
|
|
{ "channels", "", offsetof(RawAudioDemuxerContext, channels), FF_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 = pcm_read_seek, \
|
|
.flags = AVFMT_GENERIC_INDEX, \
|
|
.extensions = ext, \
|
|
.value = 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)
|