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
29 vorbis_info
vi;
/**< vorbis_info used during init */
30 vorbis_dsp_state
vd;
/**< DSP state used for analysis */
31 vorbis_block
vb;
/**< vorbis_block used for analysis */
32 vorbis_comment
vc;
/**< VorbisComment info */
35
39 int i, hsizes[3];
40 unsigned char *headers[3], *extradata = avccontext->
extradata;
41
42 vorbis_info_init(&context->
vi) ;
43 vorbis_comment_init(&context->
vc) ;
44
47 return -1;
48 }
49
50 if(p[0] == 0 && p[1] == 30) {
51 for(i = 0; i < 3; i++){
52 hsizes[i] = bytestream_get_be16((
const uint8_t **)&p);
53 headers[i] = p;
54 p += hsizes[i];
55 }
56 } else if(*p == 2) {
58 p++;
59 for(i=0; i<2; i++) {
60 hsizes[i] = 0;
61 while((*p == 0xFF) && (offset < avccontext->extradata_size)) {
62 hsizes[i] += 0xFF;
63 offset++;
64 p++;
65 }
68 "vorbis header sizes damaged\n");
69 return -1;
70 }
71 hsizes[i] += *p;
72 offset++;
73 p++;
74 }
76 #if 0
78 "vorbis header sizes: %d, %d, %d, / extradata_len is %d \n",
80 #endif
81 headers[0] = extradata +
offset;
82 headers[1] = extradata + offset + hsizes[0];
83 headers[2] = extradata + offset + hsizes[0] + hsizes[1];
84 } else {
86 "vorbis initial header len is wrong: %d\n", *p);
87 return -1;
88 }
89
90 for(i=0; i<3; i++){
91 context->
op.b_o_s= i==0;
92 context->
op.bytes = hsizes[i];
93 context->
op.packet = headers[i];
94 if(vorbis_synthesis_headerin(&context->
vi, &context->
vc, &context->
op)<0){
96 return -1;
97 }
98 }
99
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 {
133 float **pcm ;
135 int samples, total_samples, total_bytes;
136 int ret;
137 int16_t *output;
138
140 //FIXME flush
141 return 0;
142 }
143
147 return ret;
148 }
149 output = (int16_t *)context->
frame.
data[0];
150
151
152 op->packet = avpkt->
data;
153 op->bytes = avpkt->
size;
154
155 // 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);
156
157 /* for(i=0; i<op->bytes; i++)
158 av_log(avccontext, AV_LOG_DEBUG, "%02X ", op->packet[i]);
159 av_log(avccontext, AV_LOG_DEBUG, "\n");*/
160
161 if(vorbis_synthesis(&context->
vb, op) == 0)
162 vorbis_synthesis_blockin(&context->
vd, &context->
vb) ;
163
164 total_samples = 0 ;
165 total_bytes = 0 ;
166
167 while((samples = vorbis_synthesis_pcmout(&context->
vd, &pcm)) > 0) {
168 conv(samples, pcm, (
char*)output + total_bytes, context->
vi.channels) ;
169 total_bytes += samples * 2 * context->
vi.channels ;
171 vorbis_synthesis_read(&context->
vd, samples) ;
172 }
173
175 *got_frame_ptr = 1;
178 }
179
180
183
184 vorbis_info_clear(&context->
vi) ;
185 vorbis_comment_clear(&context->
vc) ;
186
187 return 0 ;
188 }
189
190
201 };