| /* | |
| * 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 "config_components.h" | |
| #include "libavutil/avstring.h" | |
| #include "libavutil/channel_layout.h" | |
| #include "avformat.h" | |
| #include "demux.h" | |
| #include "internal.h" | |
| #include "pcm.h" | |
| #include "libavutil/log.h" | |
| #include "libavutil/opt.h" | |
| #include "libavutil/avassert.h" | |
| typedef struct PCMAudioDemuxerContext { | |
| AVClass *class; | |
| int sample_rate; | |
| AVChannelLayout ch_layout; | |
| } PCMAudioDemuxerContext; | |
| static int pcm_read_header(AVFormatContext *s) | |
| { | |
| PCMAudioDemuxerContext *s1 = s->priv_data; | |
| AVCodecParameters *par; | |
| AVStream *st; | |
| uint8_t *mime_type = NULL; | |
| int ret; | |
| st = avformat_new_stream(s, NULL); | |
| if (!st) | |
| return AVERROR(ENOMEM); | |
| par = st->codecpar; | |
| par->codec_type = AVMEDIA_TYPE_AUDIO; | |
| par->codec_id = ffifmt(s->iformat)->raw_codec_id; | |
| par->sample_rate = s1->sample_rate; | |
| ret = av_channel_layout_copy(&par->ch_layout, &s1->ch_layout); | |
| if (ret < 0) | |
| return ret; | |
| av_opt_get(s->pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type); | |
| if (mime_type && s->iformat->mime_type) { | |
| int rate = 0, channels = 0, little_endian = 0; | |
| const char *options; | |
| if (av_stristart(mime_type, s->iformat->mime_type, &options)) { /* audio/L16 */ | |
| while (options = strchr(options, ';')) { | |
| options++; | |
| if (!rate) | |
| sscanf(options, " rate=%d", &rate); | |
| if (!channels) | |
| sscanf(options, " channels=%d", &channels); | |
| if (!little_endian) { | |
| char val[sizeof("little-endian")]; | |
| if (sscanf(options, " endianness=%13s", val) == 1) { | |
| little_endian = strcmp(val, "little-endian") == 0; | |
| } | |
| } | |
| } | |
| if (rate <= 0) { | |
| av_log(s, AV_LOG_ERROR, | |
| "Invalid sample_rate found in mime_type \"%s\"\n", | |
| mime_type); | |
| av_freep(&mime_type); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| par->sample_rate = rate; | |
| if (channels > 0) { | |
| av_channel_layout_uninit(&par->ch_layout); | |
| par->ch_layout.nb_channels = channels; | |
| } | |
| if (little_endian) | |
| par->codec_id = AV_CODEC_ID_PCM_S16LE; | |
| } | |
| } | |
| av_freep(&mime_type); | |
| par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id); | |
| av_assert0(par->bits_per_coded_sample > 0); | |
| par->block_align = par->bits_per_coded_sample * par->ch_layout.nb_channels / 8; | |
| avpriv_set_pts_info(st, 64, 1, par->sample_rate); | |
| return 0; | |
| } | |
| static const AVOption pcm_options[] = { | |
| { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, | |
| { "ch_layout", "", offsetof(PCMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "mono"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, | |
| { NULL }, | |
| }; | |
| static const AVClass pcm_demuxer_class = { | |
| .class_name = "pcm demuxer", | |
| .item_name = av_default_item_name, | |
| .option = pcm_options, | |
| .version = LIBAVUTIL_VERSION_INT, | |
| }; | |
| #define PCMDEF_0(name_, long_name_, ext, codec, ...) | |
| #define PCMDEF_1(name_, long_name_, ext, codec, ...) \ | |
| const FFInputFormat ff_pcm_ ## name_ ## _demuxer = { \ | |
| .p.name = #name_, \ | |
| .p.long_name = NULL_IF_CONFIG_SMALL(long_name_), \ | |
| .p.flags = AVFMT_GENERIC_INDEX, \ | |
| .p.extensions = ext, \ | |
| .p.priv_class = &pcm_demuxer_class, \ | |
| .priv_data_size = sizeof(PCMAudioDemuxerContext), \ | |
| .read_header = pcm_read_header, \ | |
| .read_packet = ff_pcm_read_packet, \ | |
| .read_seek = ff_pcm_read_seek, \ | |
| .raw_codec_id = codec, \ | |
| __VA_ARGS__ \ | |
| }; | |
| #define PCMDEF_2(name, long_name, ext, codec, enabled, ...) \ | |
| PCMDEF_ ## enabled(name, long_name, ext, codec, __VA_ARGS__) | |
| #define PCMDEF_3(name, long_name, ext, codec, config, ...) \ | |
| PCMDEF_2(name, long_name, ext, codec, config, __VA_ARGS__) | |
| #define PCMDEF_EXT(name, long_name, ext, uppercase, ...) \ | |
| PCMDEF_3(name, long_name, ext, AV_CODEC_ID_PCM_ ## uppercase, \ | |
| CONFIG_PCM_ ## uppercase ## _DEMUXER, __VA_ARGS__) | |
| #define PCMDEF(name, long_name, ext, uppercase) \ | |
| PCMDEF_EXT(name, long_name, ext, uppercase, ) | |
| PCMDEF(f64be, "PCM 64-bit floating-point big-endian", NULL, F64BE) | |
| PCMDEF(f64le, "PCM 64-bit floating-point little-endian", NULL, F64LE) | |
| PCMDEF(f32be, "PCM 32-bit floating-point big-endian", NULL, F32BE) | |
| PCMDEF(f32le, "PCM 32-bit floating-point little-endian", NULL, F32LE) | |
| PCMDEF(s32be, "PCM signed 32-bit big-endian", NULL, S32BE) | |
| PCMDEF(s32le, "PCM signed 32-bit little-endian", NULL, S32LE) | |
| PCMDEF(s24be, "PCM signed 24-bit big-endian", NULL, S24BE) | |
| PCMDEF(s24le, "PCM signed 24-bit little-endian", NULL, S24LE) | |
| PCMDEF_EXT(s16be, "PCM signed 16-bit big-endian", | |
| AV_NE("sw", NULL), S16BE, .p.mime_type = "audio/L16") | |
| PCMDEF(s16le, "PCM signed 16-bit little-endian", AV_NE(NULL, "sw"), S16LE) | |
| PCMDEF(s8, "PCM signed 8-bit", "sb", S8) | |
| PCMDEF(u32be, "PCM unsigned 32-bit big-endian", NULL, U32BE) | |
| PCMDEF(u32le, "PCM unsigned 32-bit little-endian", NULL, U32LE) | |
| PCMDEF(u24be, "PCM unsigned 24-bit big-endian", NULL, U24BE) | |
| PCMDEF(u24le, "PCM unsigned 24-bit little-endian", NULL, U24LE) | |
| PCMDEF(u16be, "PCM unsigned 16-bit big-endian", AV_NE("uw", NULL), U16BE) | |
| PCMDEF(u16le, "PCM unsigned 16-bit little-endian", AV_NE(NULL, "uw"), U16LE) | |
| PCMDEF(u8, "PCM unsigned 8-bit", "ub", U8) | |
| PCMDEF(alaw, "PCM A-law", "al", ALAW) | |
| PCMDEF(mulaw, "PCM mu-law", "ul", MULAW) | |
| PCMDEF(vidc, "PCM Archimedes VIDC", NULL, VIDC) | |
| #if CONFIG_SLN_DEMUXER | |
| static const AVOption sln_options[] = { | |
| { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, | |
| { "ch_layout", "", offsetof(PCMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "mono"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, | |
| { NULL }, | |
| }; | |
| static const AVClass sln_demuxer_class = { | |
| .class_name = "sln demuxer", | |
| .item_name = av_default_item_name, | |
| .option = sln_options, | |
| .version = LIBAVUTIL_VERSION_INT, | |
| }; | |
| const FFInputFormat ff_sln_demuxer = { | |
| .p.name = "sln", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"), | |
| .p.flags = AVFMT_GENERIC_INDEX, | |
| .p.extensions = "sln", | |
| .p.priv_class = &sln_demuxer_class, | |
| .priv_data_size = sizeof(PCMAudioDemuxerContext), | |
| .read_header = pcm_read_header, | |
| .read_packet = ff_pcm_read_packet, | |
| .read_seek = ff_pcm_read_seek, | |
| .raw_codec_id = AV_CODEC_ID_PCM_S16LE, | |
| }; | |
| #endif |