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https://github.com/FFmpeg/FFmpeg.git
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138 lines
4.7 KiB
C
138 lines
4.7 KiB
C
/*
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* RAW PCM demuxers
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* Copyright (c) 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "rawdec.h"
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#include "pcm.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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#define RAW_SAMPLES 1024
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static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, size, bps;
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// AVStream *st = s->streams[0];
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size= RAW_SAMPLES*s->streams[0]->codec->block_align;
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ret= av_get_packet(s->pb, pkt, size);
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
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pkt->stream_index = 0;
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if (ret < 0)
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return ret;
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bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
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av_assert1(bps); // if false there IS a bug elsewhere (NOT in this function)
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pkt->dts=
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pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
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return ret;
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}
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static const AVOption pcm_options[] = {
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{ "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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{ "channels", "", offsetof(RawAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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{ NULL },
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};
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#define PCMDEF(name_, long_name_, ext, codec) \
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static const AVClass name_ ## _demuxer_class = { \
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.class_name = #name_ " demuxer", \
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.item_name = av_default_item_name, \
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.option = pcm_options, \
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.version = LIBAVUTIL_VERSION_INT, \
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}; \
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AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
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.name = #name_, \
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.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
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.priv_data_size = sizeof(RawAudioDemuxerContext), \
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.read_header = ff_raw_read_header, \
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.read_packet = raw_read_packet, \
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.read_seek = ff_pcm_read_seek, \
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.flags = AVFMT_GENERIC_INDEX, \
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.extensions = ext, \
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.raw_codec_id = codec, \
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.priv_class = &name_ ## _demuxer_class, \
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};
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PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",
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NULL, CODEC_ID_PCM_F64BE)
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PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",
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NULL, CODEC_ID_PCM_F64LE)
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PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",
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NULL, CODEC_ID_PCM_F32BE)
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PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",
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NULL, CODEC_ID_PCM_F32LE)
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PCMDEF(s32be, "PCM signed 32 bit big-endian format",
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NULL, CODEC_ID_PCM_S32BE)
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PCMDEF(s32le, "PCM signed 32 bit little-endian format",
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NULL, CODEC_ID_PCM_S32LE)
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PCMDEF(s24be, "PCM signed 24 bit big-endian format",
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NULL, CODEC_ID_PCM_S24BE)
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PCMDEF(s24le, "PCM signed 24 bit little-endian format",
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NULL, CODEC_ID_PCM_S24LE)
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PCMDEF(s16be, "PCM signed 16 bit big-endian format",
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AV_NE("sw", NULL), CODEC_ID_PCM_S16BE)
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PCMDEF(s16le, "PCM signed 16 bit little-endian format",
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AV_NE(NULL, "sw"), CODEC_ID_PCM_S16LE)
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PCMDEF(s8, "PCM signed 8 bit format",
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"sb", CODEC_ID_PCM_S8)
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PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",
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NULL, CODEC_ID_PCM_U32BE)
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PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",
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NULL, CODEC_ID_PCM_U32LE)
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PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",
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NULL, CODEC_ID_PCM_U24BE)
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PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",
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NULL, CODEC_ID_PCM_U24LE)
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PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
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AV_NE("uw", NULL), CODEC_ID_PCM_U16BE)
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PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
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AV_NE(NULL, "uw"), CODEC_ID_PCM_U16LE)
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PCMDEF(u8, "PCM unsigned 8 bit format",
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"ub", CODEC_ID_PCM_U8)
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PCMDEF(alaw, "PCM A-law format",
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"al", CODEC_ID_PCM_ALAW)
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PCMDEF(mulaw, "PCM mu-law format",
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"ul", CODEC_ID_PCM_MULAW)
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