1 /*****************************************************************************
2 * audio.c: audio decoder using ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: audio.c,v 1.12 2003/01/11 18:10:49 fenrir Exp $
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
32 #include <vlc/decoder.h>
33 #include <vlc/input.h>
36 #include <unistd.h> /* getpid() */
42 #ifdef HAVE_SYS_TIMES_H
43 # include <sys/times.h>
46 #include "aout_internal.h"
48 #include "avcodec.h" /* ffmpeg */
50 //#include "postprocessing/postprocessing.h"
57 int E_( InitThread_Audio ) ( adec_thread_t * );
58 void E_( EndThread_Audio ) ( adec_thread_t * );
59 void E_( DecodeThread_Audio ) ( adec_thread_t * );
61 static unsigned int pi_channels_maps[6] =
64 AOUT_CHAN_CENTER, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
65 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
66 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
67 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
68 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
71 /*****************************************************************************
73 *****************************************************************************/
75 static void ffmpeg_GetWaveFormatEx( waveformatex_t *p_wh,
78 WAVEFORMATEX *p_wfdata = (WAVEFORMATEX*)p_data;
80 p_wh->i_formattag = p_wfdata->wFormatTag;
81 p_wh->i_nb_channels = p_wfdata->nChannels;
82 p_wh->i_samplespersec = p_wfdata->nSamplesPerSec;
83 p_wh->i_avgbytespersec= p_wfdata->nAvgBytesPerSec;
84 p_wh->i_blockalign = p_wfdata->nBlockAlign;
85 p_wh->i_bitspersample = p_wfdata->wBitsPerSample;
86 p_wh->i_size = p_wfdata->cbSize;
90 p_wh->p_data = malloc( p_wh->i_size );
92 p_data + sizeof(WAVEFORMATEX) ,
98 /*****************************************************************************
100 * Functions that initialize, decode and end the decoding process
102 * Functions exported for ffmpeg.c
103 * * E_( InitThread_Audio )
104 * * E_( DecodeThread_Audio )
105 * * E_( EndThread_Video_Audio )
106 *****************************************************************************/
108 /*****************************************************************************
109 * InitThread: initialize vdec output thread
110 *****************************************************************************
111 * This function is called from decoder_Run and performs the second step
112 * of the initialization. It returns 0 on success. Note that the thread's
113 * flag are not modified inside this function.
115 * ffmpeg codec will be open, some memory allocated.
116 *****************************************************************************/
117 int E_( InitThread_Audio )( adec_thread_t *p_adec )
121 if( ( p_wf = p_adec->p_fifo->p_waveformatex ) != NULL )
123 ffmpeg_GetWaveFormatEx( &p_adec->format,
128 msg_Warn( p_adec->p_fifo, "audio informations missing" );
131 /* ***** Fill p_context with init values ***** */
132 p_adec->p_context->sample_rate = p_adec->format.i_samplespersec;
133 p_adec->p_context->channels = p_adec->format.i_nb_channels;
134 #if LIBAVCODEC_BUILD >= 4618
135 p_adec->p_context->block_align = p_adec->format.i_blockalign;
137 p_adec->p_context->bit_rate = p_adec->format.i_avgbytespersec * 8;
139 if( ( p_adec->p_context->extradata_size = p_adec->format.i_size ) > 0 )
141 p_adec->p_context->extradata =
142 malloc( p_adec->format.i_size );
144 memcpy( p_adec->p_context->extradata,
145 p_adec->format.p_data,
146 p_adec->format.i_size );
149 /* ***** Open the codec ***** */
150 if (avcodec_open(p_adec->p_context, p_adec->p_codec) < 0)
152 msg_Err( p_adec->p_fifo,
153 "cannot open codec (%s)",
154 p_adec->psz_namecodec );
159 msg_Dbg( p_adec->p_fifo,
160 "ffmpeg codec (%s) started",
161 p_adec->psz_namecodec );
164 p_adec->p_output = malloc( AVCODEC_MAX_AUDIO_FRAME_SIZE );
167 p_adec->output_format.i_format = AOUT_FMT_S16_NE;
168 p_adec->output_format.i_rate = p_adec->format.i_samplespersec;
169 p_adec->output_format.i_physical_channels
170 = p_adec->output_format.i_original_channels
171 = p_adec->format.i_nb_channels;
173 p_adec->p_aout = NULL;
174 p_adec->p_aout_input = NULL;
180 /*****************************************************************************
181 * DecodeThread: Called for decode one frame
182 *****************************************************************************/
183 void E_( DecodeThread_Audio )( adec_thread_t *p_adec )
186 aout_buffer_t *p_aout_buffer;
188 int i_samplesperchannel;
195 input_ExtractPES( p_adec->p_fifo, &p_pes );
198 p_adec->p_fifo->b_error = 1;
201 p_adec->pts = p_pes->i_pts;
202 i_frame_size = p_pes->i_pes_size;
204 if( i_frame_size > 0 )
210 i_need = i_frame_size + 16 + p_adec->i_buffer;
211 if( p_adec->i_buffer_size < i_need )
213 p_last = p_adec->p_buffer;
214 p_adec->p_buffer = malloc( i_need );
215 p_adec->i_buffer_size = i_need;
216 if( p_adec->i_buffer > 0 )
218 memcpy( p_adec->p_buffer, p_last, p_adec->i_buffer );
223 E_( GetPESData )( p_adec->p_buffer + p_adec->i_buffer,
226 /* make ffmpeg happier but I'm not sure it's needed for audio */
227 memset( p_adec->p_buffer + p_adec->i_buffer + i_frame_size,
231 input_DeletePES( p_adec->p_fifo->p_packets_mgt, p_pes );
232 } while( i_frame_size <= 0 );
235 i_frame_size += p_adec->i_buffer;
238 i_used = avcodec_decode_audio( p_adec->p_context,
239 (int16_t*)p_adec->p_output,
245 msg_Warn( p_adec->p_fifo,
246 "cannot decode one frame (%d bytes)",
248 p_adec->i_buffer = 0;
251 else if( i_used < i_frame_size )
253 memmove( p_adec->p_buffer,
254 p_adec->p_buffer + i_used,
255 p_adec->i_buffer_size - i_used );
257 p_adec->i_buffer = i_frame_size - i_used;
261 p_adec->i_buffer = 0;
264 i_frame_size -= i_used;
266 // msg_Dbg( p_adec->p_fifo, "frame size:%d buffer used:%d", i_frame_size, i_used );
267 if( i_output_size <= 0 )
269 msg_Warn( p_adec->p_fifo,
270 "decoded %d samples bytes",
274 if( p_adec->p_context->channels <= 0 ||
275 p_adec->p_context->channels > 5 )
277 msg_Warn( p_adec->p_fifo,
278 "invalid channels count %d",
279 p_adec->p_context->channels );
282 /* **** Now we can output these samples **** */
283 i_samplesperchannel = i_output_size / 2
284 / aout_FormatNbChannels( &p_adec->output_format );
285 /* **** First check if we have a valid output **** */
286 if( ( p_adec->p_aout_input == NULL )||
287 ( p_adec->output_format.i_original_channels !=
288 pi_channels_maps[p_adec->p_context->channels] ) )
290 if( p_adec->p_aout_input != NULL )
292 /* **** Delete the old **** */
293 aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );
296 /* **** Create a new audio output **** */
297 p_adec->output_format.i_physical_channels =
298 p_adec->output_format.i_original_channels =
299 pi_channels_maps[p_adec->p_context->channels];
301 aout_DateInit( &p_adec->date, p_adec->output_format.i_rate );
302 p_adec->p_aout_input = aout_DecNew( p_adec->p_fifo,
304 &p_adec->output_format );
307 if( !p_adec->p_aout_input )
309 msg_Err( p_adec->p_fifo, "cannot create aout" );
313 if( p_adec->pts != 0 && p_adec->pts != aout_DateGet( &p_adec->date ) )
315 aout_DateSet( &p_adec->date, p_adec->pts );
317 else if( !aout_DateGet( &p_adec->date ) )
322 p_aout_buffer = aout_DecNewBuffer( p_adec->p_aout,
323 p_adec->p_aout_input,
324 i_samplesperchannel );
327 msg_Err( p_adec->p_fifo, "cannot get aout buffer" );
328 p_adec->p_fifo->b_error = 1;
332 p_aout_buffer->start_date = aout_DateGet( &p_adec->date );
333 p_aout_buffer->end_date = aout_DateIncrement( &p_adec->date,
334 i_samplesperchannel );
335 memcpy( p_aout_buffer->p_buffer,
337 p_aout_buffer->i_nb_bytes );
339 aout_DecPlay( p_adec->p_aout, p_adec->p_aout_input, p_aout_buffer );
341 if( i_frame_size > 0 )
350 /*****************************************************************************
351 * EndThread: thread destruction
352 *****************************************************************************
353 * This function is called when the thread ends after a sucessful
355 *****************************************************************************/
356 void E_( EndThread_Audio )( adec_thread_t *p_adec )
358 FREE( p_adec->format.p_data );
360 if( p_adec->p_aout_input )
362 aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );