| /* |
| * 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" |
| |
| #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), 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 = 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) |