| /* |
| * 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 "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; |
| int channels; |
| } PCMAudioDemuxerContext; |
| |
| static int pcm_read_header(AVFormatContext *s) |
| { |
| PCMAudioDemuxerContext *s1 = s->priv_data; |
| AVStream *st; |
| uint8_t *mime_type = NULL; |
| |
| st = avformat_new_stream(s, NULL); |
| if (!st) |
| return AVERROR(ENOMEM); |
| |
| |
| st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| st->codecpar->codec_id = s->iformat->raw_codec_id; |
| st->codecpar->sample_rate = s1->sample_rate; |
| st->codecpar->channels = s1->channels; |
| |
| 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; |
| size_t len = strlen(s->iformat->mime_type); |
| if (!av_strncasecmp(s->iformat->mime_type, mime_type, len)) { /* audio/L16 */ |
| uint8_t *options = mime_type + len; |
| len = strlen(mime_type); |
| while (options < mime_type + len) { |
| options = strstr(options, ";"); |
| if (!options++) |
| break; |
| if (!rate) |
| sscanf(options, " rate=%d", &rate); |
| if (!channels) |
| sscanf(options, " channels=%d", &channels); |
| if (!little_endian) { |
| char val[14]; /* sizeof("little-endian") == 14 */ |
| 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; |
| } |
| st->codecpar->sample_rate = rate; |
| if (channels > 0) |
| st->codecpar->channels = channels; |
| if (little_endian) |
| st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; |
| } |
| } |
| av_freep(&mime_type); |
| |
| st->codecpar->bits_per_coded_sample = |
| av_get_bits_per_sample(st->codecpar->codec_id); |
| |
| av_assert0(st->codecpar->bits_per_coded_sample > 0); |
| |
| st->codecpar->block_align = |
| st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8; |
| |
| avpriv_set_pts_info(st, 64, 1, st->codecpar->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 }, |
| { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 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(PCMAudioDemuxerContext), \ |
| .read_header = pcm_read_header, \ |
| .read_packet = ff_pcm_read_packet, \ |
| .read_seek = ff_pcm_read_seek, \ |
| .flags = AVFMT_GENERIC_INDEX, \ |
| .extensions = ext, \ |
| .raw_codec_id = codec, \ |
| .priv_class = &name_ ## _demuxer_class, \ |
| __VA_ARGS__ \ |
| }; |
| |
| PCMDEF(f64be, "PCM 64-bit floating-point big-endian", |
| NULL, AV_CODEC_ID_PCM_F64BE) |
| |
| PCMDEF(f64le, "PCM 64-bit floating-point little-endian", |
| NULL, AV_CODEC_ID_PCM_F64LE) |
| |
| PCMDEF(f32be, "PCM 32-bit floating-point big-endian", |
| NULL, AV_CODEC_ID_PCM_F32BE) |
| |
| PCMDEF(f32le, "PCM 32-bit floating-point little-endian", |
| NULL, AV_CODEC_ID_PCM_F32LE) |
| |
| PCMDEF(s32be, "PCM signed 32-bit big-endian", |
| NULL, AV_CODEC_ID_PCM_S32BE) |
| |
| PCMDEF(s32le, "PCM signed 32-bit little-endian", |
| NULL, AV_CODEC_ID_PCM_S32LE) |
| |
| PCMDEF(s24be, "PCM signed 24-bit big-endian", |
| NULL, AV_CODEC_ID_PCM_S24BE) |
| |
| PCMDEF(s24le, "PCM signed 24-bit little-endian", |
| NULL, AV_CODEC_ID_PCM_S24LE) |
| |
| PCMDEF(s16be, "PCM signed 16-bit big-endian", |
| AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE, .mime_type = "audio/L16") |
| |
| PCMDEF(s16le, "PCM signed 16-bit little-endian", |
| AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE) |
| |
| PCMDEF(s8, "PCM signed 8-bit", |
| "sb", AV_CODEC_ID_PCM_S8) |
| |
| PCMDEF(u32be, "PCM unsigned 32-bit big-endian", |
| NULL, AV_CODEC_ID_PCM_U32BE) |
| |
| PCMDEF(u32le, "PCM unsigned 32-bit little-endian", |
| NULL, AV_CODEC_ID_PCM_U32LE) |
| |
| PCMDEF(u24be, "PCM unsigned 24-bit big-endian", |
| NULL, AV_CODEC_ID_PCM_U24BE) |
| |
| PCMDEF(u24le, "PCM unsigned 24-bit little-endian", |
| NULL, AV_CODEC_ID_PCM_U24LE) |
| |
| PCMDEF(u16be, "PCM unsigned 16-bit big-endian", |
| AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE) |
| |
| PCMDEF(u16le, "PCM unsigned 16-bit little-endian", |
| AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE) |
| |
| PCMDEF(u8, "PCM unsigned 8-bit", |
| "ub", AV_CODEC_ID_PCM_U8) |
| |
| PCMDEF(alaw, "PCM A-law", |
| "al", AV_CODEC_ID_PCM_ALAW) |
| |
| PCMDEF(mulaw, "PCM mu-law", |
| "ul", AV_CODEC_ID_PCM_MULAW) |
| |
| PCMDEF(vidc, "PCM Archimedes VIDC", |
| NULL, AV_CODEC_ID_PCM_VIDC) |
| |
| 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 }, |
| { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, 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, |
| }; |
| |
| AVInputFormat ff_sln_demuxer = { |
| .name = "sln", |
| .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"), |
| .priv_data_size = sizeof(PCMAudioDemuxerContext), |
| .read_header = pcm_read_header, |
| .read_packet = ff_pcm_read_packet, |
| .read_seek = ff_pcm_read_seek, |
| .flags = AVFMT_GENERIC_INDEX, |
| .extensions = "sln", |
| .raw_codec_id = AV_CODEC_ID_PCM_S16LE, |
| .priv_class = &sln_demuxer_class, |
| }; |
