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