diff options
Diffstat (limited to 'ffmpeg1/libavformat/pcmdec.c')
| -rw-r--r-- | ffmpeg1/libavformat/pcmdec.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/pcmdec.c b/ffmpeg1/libavformat/pcmdec.c new file mode 100644 index 0000000..f4264d9 --- /dev/null +++ b/ffmpeg1/libavformat/pcmdec.c @@ -0,0 +1,146 @@ +/* + * 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; + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + st->codec->codec_id = s->iformat->raw_codec_id; + st->codec->sample_rate = s1->sample_rate; + st->codec->channels = s1->channels; + + st->codec->bits_per_coded_sample = + av_get_bits_per_sample(st->codec->codec_id); + + av_assert0(st->codec->bits_per_coded_sample > 0); + + st->codec->block_align = + st->codec->bits_per_coded_sample * st->codec->channels / 8; + + avpriv_set_pts_info(st, 64, 1, st->codec->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, \ +}; + +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) + +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) |