1 /*****************************************************************************
2 * audio.c: audio decoder using ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: audio.c,v 1.15 2003/04/17 10:58:30 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 /*****************************************************************************
77 * Functions that initialize, decode and end the decoding process
79 * Functions exported for ffmpeg.c
80 * * E_( InitThread_Audio )
81 * * E_( DecodeThread_Audio )
82 * * E_( EndThread_Video_Audio )
83 *****************************************************************************/
85 /*****************************************************************************
86 * InitThread: initialize vdec output thread
87 *****************************************************************************
88 * This function is called from decoder_Run and performs the second step
89 * of the initialization. It returns 0 on success. Note that the thread's
90 * flag are not modified inside this function.
92 * ffmpeg codec will be open, some memory allocated.
93 *****************************************************************************/
94 int E_( InitThread_Audio )( adec_thread_t *p_adec )
96 WAVEFORMATEX wf, *p_wf;
98 if( ( p_wf = p_adec->p_fifo->p_waveformatex ) == NULL )
100 msg_Warn( p_adec->p_fifo, "audio informations missing" );
102 memset( p_wf, 0, sizeof( WAVEFORMATEX ) );
105 /* ***** Fill p_context with init values ***** */
106 p_adec->p_context->sample_rate = p_wf->nSamplesPerSec;
107 p_adec->p_context->channels = p_wf->nChannels;
108 p_adec->p_context->block_align = p_wf->nBlockAlign;
109 p_adec->p_context->bit_rate = p_wf->nAvgBytesPerSec * 8;
111 if( ( p_adec->p_context->extradata_size = p_wf->cbSize ) > 0 )
113 p_adec->p_context->extradata =
114 malloc( p_wf->cbSize );
116 memcpy( p_adec->p_context->extradata,
121 /* ***** Open the codec ***** */
122 if (avcodec_open(p_adec->p_context, p_adec->p_codec) < 0)
124 msg_Err( p_adec->p_fifo,
125 "cannot open codec (%s)",
126 p_adec->psz_namecodec );
131 msg_Dbg( p_adec->p_fifo,
132 "ffmpeg codec (%s) started",
133 p_adec->psz_namecodec );
136 p_adec->p_output = malloc( 3 * AVCODEC_MAX_AUDIO_FRAME_SIZE );
139 p_adec->output_format.i_format = AOUT_FMT_S16_NE;
140 p_adec->output_format.i_rate = p_wf->nSamplesPerSec;
141 p_adec->output_format.i_physical_channels
142 = p_adec->output_format.i_original_channels
143 = pi_channels_maps[p_wf->nChannels];
145 p_adec->p_aout = NULL;
146 p_adec->p_aout_input = NULL;
152 /*****************************************************************************
153 * DecodeThread: Called for decode one frame
154 *****************************************************************************/
155 void E_( DecodeThread_Audio )( adec_thread_t *p_adec )
158 aout_buffer_t *p_aout_buffer;
160 int i_samplesperchannel;
167 input_ExtractPES( p_adec->p_fifo, &p_pes );
170 p_adec->p_fifo->b_error = 1;
173 p_adec->pts = p_pes->i_pts;
174 i_frame_size = p_pes->i_pes_size;
176 if( i_frame_size > 0 )
182 i_need = i_frame_size + 16 + p_adec->i_buffer;
183 if( p_adec->i_buffer_size < i_need )
185 p_last = p_adec->p_buffer;
186 p_adec->p_buffer = malloc( i_need );
187 p_adec->i_buffer_size = i_need;
188 if( p_adec->i_buffer > 0 )
190 memcpy( p_adec->p_buffer, p_last, p_adec->i_buffer );
195 E_( GetPESData )( p_adec->p_buffer + p_adec->i_buffer,
198 /* make ffmpeg happier but I'm not sure it's needed for audio */
199 memset( p_adec->p_buffer + p_adec->i_buffer + i_frame_size,
203 input_DeletePES( p_adec->p_fifo->p_packets_mgt, p_pes );
204 } while( i_frame_size <= 0 );
207 i_frame_size += p_adec->i_buffer;
210 i_used = avcodec_decode_audio( p_adec->p_context,
211 (int16_t*)p_adec->p_output,
217 msg_Warn( p_adec->p_fifo,
218 "cannot decode one frame (%d bytes)",
220 p_adec->i_buffer = 0;
223 else if( i_used < i_frame_size )
225 memmove( p_adec->p_buffer,
226 p_adec->p_buffer + i_used,
227 p_adec->i_buffer_size - i_used );
229 p_adec->i_buffer = i_frame_size - i_used;
233 p_adec->i_buffer = 0;
236 i_frame_size -= i_used;
238 // msg_Dbg( p_adec->p_fifo, "frame size:%d buffer used:%d", i_frame_size, i_used );
239 if( i_output_size <= 0 )
241 msg_Warn( p_adec->p_fifo,
242 "decoded %d samples bytes",
246 if( p_adec->p_context->channels <= 0 ||
247 p_adec->p_context->channels > 5 )
249 msg_Warn( p_adec->p_fifo,
250 "invalid channels count %d",
251 p_adec->p_context->channels );
254 /* **** Now we can output these samples **** */
255 i_samplesperchannel = i_output_size / 2
256 / aout_FormatNbChannels( &p_adec->output_format );
257 /* **** First check if we have a valid output **** */
258 if( ( p_adec->p_aout_input == NULL )||
259 ( p_adec->output_format.i_original_channels !=
260 pi_channels_maps[p_adec->p_context->channels] ) )
262 if( p_adec->p_aout_input != NULL )
264 /* **** Delete the old **** */
265 aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );
268 /* **** Create a new audio output **** */
269 p_adec->output_format.i_physical_channels =
270 p_adec->output_format.i_original_channels =
271 pi_channels_maps[p_adec->p_context->channels];
273 aout_DateInit( &p_adec->date, p_adec->output_format.i_rate );
274 p_adec->p_aout_input = aout_DecNew( p_adec->p_fifo,
276 &p_adec->output_format );
279 if( !p_adec->p_aout_input )
281 msg_Err( p_adec->p_fifo, "cannot create aout" );
285 if( p_adec->pts != 0 && p_adec->pts != aout_DateGet( &p_adec->date ) )
287 aout_DateSet( &p_adec->date, p_adec->pts );
289 else if( !aout_DateGet( &p_adec->date ) )
294 p_aout_buffer = aout_DecNewBuffer( p_adec->p_aout,
295 p_adec->p_aout_input,
296 i_samplesperchannel );
299 msg_Err( p_adec->p_fifo, "cannot get aout buffer" );
300 p_adec->p_fifo->b_error = 1;
304 p_aout_buffer->start_date = aout_DateGet( &p_adec->date );
305 p_aout_buffer->end_date = aout_DateIncrement( &p_adec->date,
306 i_samplesperchannel );
307 memcpy( p_aout_buffer->p_buffer,
309 p_aout_buffer->i_nb_bytes );
311 aout_DecPlay( p_adec->p_aout, p_adec->p_aout_input, p_aout_buffer );
313 if( i_frame_size > 0 )
322 /*****************************************************************************
323 * EndThread: thread destruction
324 *****************************************************************************
325 * This function is called when the thread ends after a sucessful
327 *****************************************************************************/
328 void E_( EndThread_Audio )( adec_thread_t *p_adec )
330 // FREE( p_adec->format.p_data );
331 FREE( p_adec->p_output );
333 if( p_adec->p_aout_input )
335 aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );