1 /*
2 * This file is part of MPlayer.
3 *
4 * MPlayer is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * MPlayer is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <sys/types.h>
23 #include <unistd.h>
24 #include <math.h>
25
26 #include "config.h"
27 #include "mp_msg.h"
28 #include "help_mp.h"
29
30 #include "img_format.h"
31
32 #include <libdv/dv.h>
33 #include <libdv/dv_types.h>
34
35 #include "stream/stream.h"
36 #include "libmpdemux/demuxer.h"
37 #include "libmpdemux/stheader.h"
38
39 #include "ad_internal.h"
40 #include "vd_libdv.h"
41
42 static const ad_info_t info =
43 {
44 "Raw DV Audio Decoder",
45 "libdv",
46 "Alexander Neundorf <neundorf@kde.org>",
47 "http://libdv.sf.net",
48 ""
49 };
50
LIBAD_EXTERN(libdv)51 LIBAD_EXTERN(libdv)
52
53 static int preinit(sh_audio_t *sh_audio)
54 {
55 sh_audio->audio_out_minsize=4*DV_AUDIO_MAX_SAMPLES*2;
56 return 1;
57 }
58
59 static int16_t *audioBuffers[4]={NULL,NULL,NULL,NULL};
60
init(sh_audio_t * sh)61 static int init(sh_audio_t *sh)
62 {
63 int i;
64 WAVEFORMATEX *h=sh->wf;
65
66 if(!h) return 0;
67
68 sh->i_bps=h->nAvgBytesPerSec;
69 sh->channels=h->nChannels;
70 sh->samplerate=h->nSamplesPerSec;
71 sh->samplesize=(h->wBitsPerSample+7)/8;
72
73 sh->context=init_global_rawdv_decoder();
74
75 for (i=0; i < 4; i++)
76 audioBuffers[i] = malloc(2*DV_AUDIO_MAX_SAMPLES);
77
78 return 1;
79 }
80
uninit(sh_audio_t * sh_audio)81 static void uninit(sh_audio_t *sh_audio)
82 {
83 int i;
84 for (i=0; i < 4; i++)
85 free(audioBuffers[i]);
86 }
87
control(sh_audio_t * sh,int cmd,void * arg,...)88 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
89 {
90 // TODO!!!
91 return CONTROL_UNKNOWN;
92 }
93
decode_audio(sh_audio_t * audio,unsigned char * buf,int minlen,int maxlen)94 static int decode_audio(sh_audio_t *audio, unsigned char *buf, int minlen, int maxlen)
95 {
96 int len=0;
97 dv_decoder_t* decoder=audio->context; //global_rawdv_decoder;
98 unsigned char* dv_audio_frame=NULL;
99 int xx=ds_get_packet(audio->ds,&dv_audio_frame);
100 if(xx<=0 || !dv_audio_frame) return 0; // EOF?
101
102 dv_parse_header(decoder, dv_audio_frame);
103
104 if(xx!=decoder->frame_size)
105 mp_msg(MSGT_GLOBAL,MSGL_WARN,MSGTR_MPCODECS_AudioFramesizeDiffers,
106 xx, (int)decoder->frame_size);
107
108 if (dv_decode_full_audio(decoder, dv_audio_frame,(int16_t**) audioBuffers))
109 {
110 /* Interleave the audio into a single buffer */
111 int i=0;
112 int16_t *bufP=(int16_t*)buf;
113
114 // printf("samples=%d/%d chans=%d mem=%d \n",decoder->audio->samples_this_frame,DV_AUDIO_MAX_SAMPLES,
115 // decoder->audio->num_channels, decoder->audio->samples_this_frame*decoder->audio->num_channels*2);
116
117 // return (44100/30)*4;
118
119 for (i=0; i < decoder->audio->samples_this_frame; i++)
120 {
121 int ch;
122 for (ch=0; ch < decoder->audio->num_channels; ch++)
123 bufP[len++] = audioBuffers[ch][i];
124 }
125 }
126 return len*2;
127 }
128