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124 lines
3.5 KiB
C
124 lines
3.5 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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#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->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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assert(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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#define PCMDEF(name, long_name, ext, codec) \
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AVInputFormat ff_pcm_ ## name ## _demuxer = {\
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#name,\
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NULL_IF_CONFIG_SMALL(long_name),\
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sizeof(RawAudioDemuxerContext),\
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NULL,\
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ff_raw_read_header,\
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raw_read_packet,\
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NULL,\
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pcm_read_seek,\
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.flags= AVFMT_GENERIC_INDEX,\
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.extensions = ext,\
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.value = codec,\
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.priv_class = &ff_rawaudio_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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