mirror of https://github.com/mpv-player/mpv
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include "core/m_option.h"
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#include "stream/stream.h"
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#include "demux.h"
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#include "stheader.h"
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#include "audio/format.h"
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static int channels = 2;
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static int samplerate = 44100;
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static int format = AF_FORMAT_S16_NE;
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const m_option_t demux_rawaudio_opts[] = {
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{ "channels", &channels, CONF_TYPE_INT,CONF_RANGE,1,8, NULL },
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{ "rate", &samplerate, CONF_TYPE_INT,CONF_RANGE,1000,8*48000, NULL },
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{ "format", &format, CONF_TYPE_AFMT, 0, 0, 0, NULL },
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{NULL, NULL, 0, 0, 0, 0, NULL}
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};
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static demuxer_t* demux_rawaudio_open(demuxer_t* demuxer) {
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sh_audio_t* sh_audio;
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WAVEFORMATEX* w;
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if ((format & AF_FORMAT_SPECIAL_MASK) != 0)
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return NULL;
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sh_audio = new_sh_audio(demuxer,0);
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sh_audio->wf = w = malloc(sizeof(*w));
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// Not a WAVEFORMATEX format; just abuse it to pass the internal mplayer
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// format to ad_pcm.c
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w->wFormatTag = format;
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sh_audio->format = MKTAG('M', 'P', 'a', 'f');
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w->nChannels = sh_audio->channels = channels;
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w->nSamplesPerSec = sh_audio->samplerate = samplerate;
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sh_audio->samplesize = (af_fmt2bits(format) + 7) / 8;
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w->nAvgBytesPerSec = samplerate * sh_audio->samplesize * channels;
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w->nBlockAlign = channels * sh_audio->samplesize;
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w->wBitsPerSample = 8 * sh_audio->samplesize;
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w->cbSize = 0;
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demuxer->movi_start = demuxer->stream->start_pos;
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demuxer->movi_end = demuxer->stream->end_pos;
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demuxer->audio->id = 0;
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demuxer->audio->sh = sh_audio;
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sh_audio->ds = demuxer->audio;
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sh_audio->needs_parsing = 1;
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return demuxer;
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}
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static int demux_rawaudio_fill_buffer(demuxer_t* demuxer, demux_stream_t *ds) {
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sh_audio_t* sh_audio = demuxer->audio->sh;
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int l = sh_audio->wf->nAvgBytesPerSec;
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off_t spos = stream_tell(demuxer->stream);
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demux_packet_t* dp;
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if(demuxer->stream->eof)
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return 0;
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dp = new_demux_packet(l);
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dp->pts = (spos - demuxer->movi_start) / (float)(sh_audio->wf->nAvgBytesPerSec);
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dp->pos = (spos - demuxer->movi_start);
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l = stream_read(demuxer->stream,dp->buffer,l);
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resize_demux_packet(dp, l);
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ds_add_packet(ds,dp);
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return 1;
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}
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static void demux_rawaudio_seek(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
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stream_t* s = demuxer->stream;
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sh_audio_t* sh_audio = demuxer->audio->sh;
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off_t base,pos;
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base = (flags & SEEK_ABSOLUTE) ? demuxer->movi_start : stream_tell(s);
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if(flags & SEEK_FACTOR)
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pos = base + ((demuxer->movi_end - demuxer->movi_start)*rel_seek_secs);
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else
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pos = base + (rel_seek_secs*sh_audio->i_bps);
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pos -= (pos % (sh_audio->channels * sh_audio->samplesize) );
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stream_seek(s,pos);
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// printf("demux_rawaudio: streamtell=%d\n",(int)stream_tell(demuxer->stream));
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}
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const demuxer_desc_t demuxer_desc_rawaudio = {
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"Raw audio demuxer",
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"rawaudio",
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"rawaudio",
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"?",
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"",
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DEMUXER_TYPE_RAWAUDIO,
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0, // no autodetect
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NULL,
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demux_rawaudio_fill_buffer,
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demux_rawaudio_open,
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NULL,
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demux_rawaudio_seek,
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};
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