/*
  * 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)