yading@11: /* yading@11: * RAW PCM demuxers yading@11: * Copyright (c) 2002 Fabrice Bellard yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "pcm.h" yading@11: #include "libavutil/log.h" yading@11: #include "libavutil/opt.h" yading@11: #include "libavutil/avassert.h" yading@11: yading@11: typedef struct PCMAudioDemuxerContext { yading@11: AVClass *class; yading@11: int sample_rate; yading@11: int channels; yading@11: } PCMAudioDemuxerContext; yading@11: yading@11: static int pcm_read_header(AVFormatContext *s) yading@11: { yading@11: PCMAudioDemuxerContext *s1 = s->priv_data; yading@11: AVStream *st; yading@11: yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: yading@11: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: st->codec->codec_id = s->iformat->raw_codec_id; yading@11: st->codec->sample_rate = s1->sample_rate; yading@11: st->codec->channels = s1->channels; yading@11: yading@11: st->codec->bits_per_coded_sample = yading@11: av_get_bits_per_sample(st->codec->codec_id); yading@11: yading@11: av_assert0(st->codec->bits_per_coded_sample > 0); yading@11: yading@11: st->codec->block_align = yading@11: st->codec->bits_per_coded_sample * st->codec->channels / 8; yading@11: yading@11: avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); yading@11: return 0; yading@11: } yading@11: yading@11: static const AVOption pcm_options[] = { yading@11: { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, yading@11: { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, yading@11: { NULL }, yading@11: }; yading@11: yading@11: #define PCMDEF(name_, long_name_, ext, codec) \ yading@11: static const AVClass name_ ## _demuxer_class = { \ yading@11: .class_name = #name_ " demuxer", \ yading@11: .item_name = av_default_item_name, \ yading@11: .option = pcm_options, \ yading@11: .version = LIBAVUTIL_VERSION_INT, \ yading@11: }; \ yading@11: AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \ yading@11: .name = #name_, \ yading@11: .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ yading@11: .priv_data_size = sizeof(PCMAudioDemuxerContext), \ yading@11: .read_header = pcm_read_header, \ yading@11: .read_packet = ff_pcm_read_packet, \ yading@11: .read_seek = ff_pcm_read_seek, \ yading@11: .flags = AVFMT_GENERIC_INDEX, \ yading@11: .extensions = ext, \ yading@11: .raw_codec_id = codec, \ yading@11: .priv_class = &name_ ## _demuxer_class, \ yading@11: }; yading@11: yading@11: PCMDEF(f64be, "PCM 64-bit floating-point big-endian", yading@11: NULL, AV_CODEC_ID_PCM_F64BE) yading@11: yading@11: PCMDEF(f64le, "PCM 64-bit floating-point little-endian", yading@11: NULL, AV_CODEC_ID_PCM_F64LE) yading@11: yading@11: PCMDEF(f32be, "PCM 32-bit floating-point big-endian", yading@11: NULL, AV_CODEC_ID_PCM_F32BE) yading@11: yading@11: PCMDEF(f32le, "PCM 32-bit floating-point little-endian", yading@11: NULL, AV_CODEC_ID_PCM_F32LE) yading@11: yading@11: PCMDEF(s32be, "PCM signed 32-bit big-endian", yading@11: NULL, AV_CODEC_ID_PCM_S32BE) yading@11: yading@11: PCMDEF(s32le, "PCM signed 32-bit little-endian", yading@11: NULL, AV_CODEC_ID_PCM_S32LE) yading@11: yading@11: PCMDEF(s24be, "PCM signed 24-bit big-endian", yading@11: NULL, AV_CODEC_ID_PCM_S24BE) yading@11: yading@11: PCMDEF(s24le, "PCM signed 24-bit little-endian", yading@11: NULL, AV_CODEC_ID_PCM_S24LE) yading@11: yading@11: PCMDEF(s16be, "PCM signed 16-bit big-endian", yading@11: AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE) yading@11: yading@11: PCMDEF(s16le, "PCM signed 16-bit little-endian", yading@11: AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE) yading@11: yading@11: PCMDEF(s8, "PCM signed 8-bit", yading@11: "sb", AV_CODEC_ID_PCM_S8) yading@11: yading@11: PCMDEF(u32be, "PCM unsigned 32-bit big-endian", yading@11: NULL, AV_CODEC_ID_PCM_U32BE) yading@11: yading@11: PCMDEF(u32le, "PCM unsigned 32-bit little-endian", yading@11: NULL, AV_CODEC_ID_PCM_U32LE) yading@11: yading@11: PCMDEF(u24be, "PCM unsigned 24-bit big-endian", yading@11: NULL, AV_CODEC_ID_PCM_U24BE) yading@11: yading@11: PCMDEF(u24le, "PCM unsigned 24-bit little-endian", yading@11: NULL, AV_CODEC_ID_PCM_U24LE) yading@11: yading@11: PCMDEF(u16be, "PCM unsigned 16-bit big-endian", yading@11: AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE) yading@11: yading@11: PCMDEF(u16le, "PCM unsigned 16-bit little-endian", yading@11: AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE) yading@11: yading@11: PCMDEF(u8, "PCM unsigned 8-bit", yading@11: "ub", AV_CODEC_ID_PCM_U8) yading@11: yading@11: PCMDEF(alaw, "PCM A-law", yading@11: "al", AV_CODEC_ID_PCM_ALAW) yading@11: yading@11: PCMDEF(mulaw, "PCM mu-law", yading@11: "ul", AV_CODEC_ID_PCM_MULAW)