1 /*
2 * Copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <vorbis/vorbisenc.h>
22
26
28 vorbis_info
vi;
/**< vorbis_info used during init */
29 vorbis_dsp_state
vd;
/**< DSP state used for analysis */
30 vorbis_block
vb;
/**< vorbis_block used for analysis */
31 vorbis_comment
vc;
/**< VorbisComment info */
34
38 int i, hsizes[3];
39 unsigned char *headers[3], *extradata = avccontext->
extradata;
40
41 vorbis_info_init(&context->
vi) ;
42 vorbis_comment_init(&context->
vc) ;
43
46 return -1;
47 }
48
49 if(p[0] == 0 && p[1] == 30) {
50 for(i = 0; i < 3; i++){
51 hsizes[i] = bytestream_get_be16((
const uint8_t **)&p);
52 headers[i] = p;
53 p += hsizes[i];
54 }
55 } else if(*p == 2) {
57 p++;
58 for(i=0; i<2; i++) {
59 hsizes[i] = 0;
60 while((*p == 0xFF) && (offset < avccontext->extradata_size)) {
61 hsizes[i] += 0xFF;
62 offset++;
63 p++;
64 }
67 "vorbis header sizes damaged\n");
68 return -1;
69 }
70 hsizes[i] += *p;
71 offset++;
72 p++;
73 }
75 #if 0
77 "vorbis header sizes: %d, %d, %d, / extradata_len is %d \n",
79 #endif
80 headers[0] = extradata +
offset;
81 headers[1] = extradata + offset + hsizes[0];
82 headers[2] = extradata + offset + hsizes[0] + hsizes[1];
83 } else {
85 "vorbis initial header len is wrong: %d\n", *p);
86 return -1;
87 }
88
89 for(i=0; i<3; i++){
90 context->
op.b_o_s= i==0;
91 context->
op.bytes = hsizes[i];
92 context->
op.packet = headers[i];
93 if(vorbis_synthesis_headerin(&context->
vi, &context->
vc, &context->
op)<0){
95 return -1;
96 }
97 }
98
103
104 vorbis_synthesis_init(&context->
vd, &context->
vi);
105 vorbis_block_init(&context->
vd, &context->
vb);
106
107 return 0 ;
108 }
109
110
111 static inline int conv(
int samples,
float **pcm,
char *
buf,
int channels) {
112 int i, j;
113 ogg_int16_t *ptr, *
data = (ogg_int16_t*)buf ;
114 float *mono ;
115
116 for(i = 0 ; i < channels ; i++){
117 ptr = &data[i];
118 mono = pcm[i] ;
119
120 for(j = 0 ; j < samples ; j++) {
121 *ptr = av_clip_int16(mono[j] * 32767.f);
122 ptr += channels;
123 }
124 }
125
126 return 0 ;
127 }
128
130 int *got_frame_ptr,
AVPacket *avpkt)
131 {
134 float **pcm ;
136 int samples, total_samples, total_bytes;
138 int16_t *output;
139
141 //FIXME flush
142 return 0;
143 }
144
148 output = (int16_t *)frame->
data[0];
149
150
151 op->packet = avpkt->
data;
152 op->bytes = avpkt->
size;
153
154 // av_log(avccontext, AV_LOG_DEBUG, "%d %d %d %"PRId64" %"PRId64" %d %d\n", op->bytes, op->b_o_s, op->e_o_s, op->granulepos, op->packetno, buf_size, context->vi.rate);
155
156 /* for(i=0; i<op->bytes; i++)
157 av_log(avccontext, AV_LOG_DEBUG, "%02X ", op->packet[i]);
158 av_log(avccontext, AV_LOG_DEBUG, "\n");*/
159
160 if(vorbis_synthesis(&context->
vb, op) == 0)
161 vorbis_synthesis_blockin(&context->
vd, &context->
vb) ;
162
163 total_samples = 0 ;
164 total_bytes = 0 ;
165
166 while((samples = vorbis_synthesis_pcmout(&context->
vd, &pcm)) > 0) {
167 conv(samples, pcm, (
char*)output + total_bytes, context->
vi.channels) ;
168 total_bytes += samples * 2 * context->
vi.channels ;
169 total_samples += samples ;
170 vorbis_synthesis_read(&context->
vd, samples) ;
171 }
172
174 *got_frame_ptr = 1;
176 }
177
178
181
182 vorbis_info_clear(&context->
vi) ;
183 vorbis_comment_clear(&context->
vc) ;
184
185 return 0 ;
186 }
187
188
199 };