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https://github.com/mpv-player/mpv.git
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4b5cee4617
This helps passing the channel layout correctly from decoder to audio filter chain. (Because that part "reuses" the demuxer level codec parameters, which is very disgusting.) Note that ffmpeg stuff already passed the channel layout via mp_copy_lav_codec_headers(). So other than easier dealing with the demuxer/decoder parameters mess, there's no real advantage to doing this. Make the --channels option accept a channel map. Since simple numbers map to standard layouts with the given number of channels, this is downwards compatible. Likewise for demux_rawaudio.
128 lines
3.6 KiB
C
128 lines
3.6 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 struct mp_chmap channels = MP_CHMAP_INIT_STEREO;
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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, &m_option_type_chmap, CONF_MIN, 1 },
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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->gsh->codec = "mp-pcm";
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sh_audio->format = format;
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sh_audio->wf = w = malloc(sizeof(*w));
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w->wFormatTag = 0;
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sh_audio->channels = channels;
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w->nChannels = sh_audio->channels.num;
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w->nSamplesPerSec = sh_audio->samplerate = samplerate;
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int samplesize = (af_fmt2bits(format) + 7) / 8;
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w->nAvgBytesPerSec = samplerate * samplesize * w->nChannels;
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w->nBlockAlign = w->nChannels * samplesize;
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w->wBitsPerSample = 8 * 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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int64_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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int64_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.num * 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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