nut (de)muxer update
[libav.git] / libavcodec / oggvorbis.c
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1/**
2 * @file oggvorbis.c
3 * Ogg Vorbis codec support via libvorbisenc.
4 * @author Mark Hills <mark@pogo.org.uk>
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5 */
6
7#include <time.h>
8
9#include <vorbis/vorbisenc.h>
10
11#include "avcodec.h"
12#include "oggvorbis.h"
13
14#define OGGVORBIS_FRAME_SIZE 1024
15
16
17typedef struct OggVorbisContext {
18 vorbis_info vi ;
19 vorbis_dsp_state vd ;
20 vorbis_block vb ;
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21
22 /* decoder */
23 vorbis_comment vc ;
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24} OggVorbisContext ;
25
26
27int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
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28
29#ifdef OGGVORBIS_VBR_BY_ESTIMATE
30 /* variable bitrate by estimate */
31
32 return (vorbis_encode_setup_managed(vi, avccontext->channels,
33 avccontext->sample_rate, -1, avccontext->bit_rate, -1) ||
34 vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL) ||
35 vorbis_encode_setup_init(vi)) ;
36#else
37 /* constant bitrate */
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38
39 return vorbis_encode_init(vi, avccontext->channels,
40 avccontext->sample_rate, -1, avccontext->bit_rate, -1) ;
c55427f8 41#endif
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42}
43
44
45static int oggvorbis_encode_init(AVCodecContext *avccontext) {
46 OggVorbisContext *context = avccontext->priv_data ;
47
81e0d0b4 48 vorbis_info_init(&context->vi) ;
81e0d0b4 49 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
9b879566 50 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ;
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51 return -1 ;
52 }
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53 vorbis_analysis_init(&context->vd, &context->vi) ;
54 vorbis_block_init(&context->vd, &context->vb) ;
55
56 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
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57
58 avccontext->coded_frame= avcodec_alloc_frame();
59 avccontext->coded_frame->key_frame= 1;
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60
61 return 0 ;
62}
63
64
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65static int oggvorbis_encode_frame(AVCodecContext *avccontext,
66 unsigned char *packets,
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67 int buf_size, void *data)
68{
69 OggVorbisContext *context = avccontext->priv_data ;
70 float **buffer ;
71 ogg_packet op ;
72 signed char *audio = data ;
3aca208a 73 int l, samples = OGGVORBIS_FRAME_SIZE ;
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74
75 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
76
77 if(context->vi.channels == 1) {
78 for(l = 0 ; l < samples ; l++)
79 buffer[0][l]=((audio[l*2+1]<<8)|(0x00ff&(int)audio[l*2]))/32768.f;
80 } else {
81 for(l = 0 ; l < samples ; l++){
82 buffer[0][l]=((audio[l*4+1]<<8)|(0x00ff&(int)audio[l*4]))/32768.f;
83 buffer[1][l]=((audio[l*4+3]<<8)|(0x00ff&(int)audio[l*4+2]))/32768.f;
84 }
85 }
86
87 vorbis_analysis_wrote(&context->vd, samples) ;
88
89 l = 0 ;
90
91 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
92 vorbis_analysis(&context->vb, NULL);
93 vorbis_bitrate_addblock(&context->vb) ;
94
95 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
96 memcpy(packets + l, &op, sizeof(ogg_packet)) ;
97 memcpy(packets + l + sizeof(ogg_packet), op.packet, op.bytes) ;
98 l += sizeof(ogg_packet) + op.bytes ;
99 }
100 }
101
102 return l ;
103}
104
105
3aca208a 106static int oggvorbis_encode_close(AVCodecContext *avccontext) {
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107 OggVorbisContext *context = avccontext->priv_data ;
108/* ogg_packet op ; */
109
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110 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
111
112 /* We need to write all the remaining packets into the stream
113 * on closing */
114
9b879566 115 av_log(avccontext, AV_LOG_ERROR, "fixme: not all packets written on oggvorbis_encode_close()\n") ;
3aca208a 116
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117/*
118 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
119 memcpy(packets + l, &op, sizeof(ogg_packet)) ;
120 memcpy(packets + l + sizeof(ogg_packet), op.packet, op.bytes) ;
121 l += sizeof(ogg_packet) + op.bytes ;
122 }
123*/
124
125 vorbis_block_clear(&context->vb);
126 vorbis_dsp_clear(&context->vd);
127 vorbis_info_clear(&context->vi);
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128
129 av_freep(&avccontext->coded_frame);
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130
131 return 0 ;
132}
133
134
135AVCodec oggvorbis_encoder = {
136 "vorbis",
137 CODEC_TYPE_AUDIO,
138 CODEC_ID_VORBIS,
139 sizeof(OggVorbisContext),
140 oggvorbis_encode_init,
141 oggvorbis_encode_frame,
142 oggvorbis_encode_close
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143} ;
144
145
146static int oggvorbis_decode_init(AVCodecContext *avccontext) {
147 OggVorbisContext *context = avccontext->priv_data ;
148
149 vorbis_info_init(&context->vi) ;
150 vorbis_comment_init(&context->vc) ;
151
152 return 0 ;
153}
154
155
156static inline int conv(int samples, float **pcm, char *buf, int channels) {
157 int i, j, val ;
158 ogg_int16_t *ptr, *data = (ogg_int16_t*)buf ;
159 float *mono ;
160
161 for(i = 0 ; i < channels ; i++){
162 ptr = &data[i];
163 mono = pcm[i] ;
164
165 for(j = 0 ; j < samples ; j++) {
166
167 val = mono[j] * 32767.f;
168
169 if(val > 32767) val = 32767 ;
170 if(val < -32768) val = -32768 ;
171
172 *ptr = val ;
173 ptr += channels;
174 }
175 }
176
177 return 0 ;
178}
179
180
181static int oggvorbis_decode_frame(AVCodecContext *avccontext,
182 void *data, int *data_size,
0c1a9eda 183 uint8_t *buf, int buf_size)
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184{
185 OggVorbisContext *context = avccontext->priv_data ;
186 ogg_packet *op = (ogg_packet*)buf ;
187 float **pcm ;
188 int samples, total_samples, total_bytes ;
189
190 op->packet = (char*)op + sizeof(ogg_packet) ; /* correct data pointer */
191
192 if(op->packetno < 3) {
193 vorbis_synthesis_headerin(&context->vi, &context->vc, op) ;
194 return buf_size ;
195 }
196
197 if(op->packetno == 3) {
9b879566 198 av_log(avccontext, AV_LOG_ERROR, "vorbis_decode: %d channel, %ldHz, encoder `%s'\n",
3aca208a 199 context->vi.channels, context->vi.rate, context->vc.vendor);
81e0d0b4 200
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201 avccontext->channels = context->vi.channels ;
202 avccontext->sample_rate = context->vi.rate ;
203
204 vorbis_synthesis_init(&context->vd, &context->vi) ;
205 vorbis_block_init(&context->vd, &context->vb);
206 }
207
208 if(vorbis_synthesis(&context->vb, op) == 0)
209 vorbis_synthesis_blockin(&context->vd, &context->vb) ;
210
211 total_samples = 0 ;
212 total_bytes = 0 ;
213
214 while((samples = vorbis_synthesis_pcmout(&context->vd, &pcm)) > 0) {
215 conv(samples, pcm, (char*)data + total_bytes, context->vi.channels) ;
216 total_bytes += samples * 2 * context->vi.channels ;
217 total_samples += samples ;
218 vorbis_synthesis_read(&context->vd, samples) ;
219 }
220
221 *data_size = total_bytes ;
222 return buf_size ;
223}
81e0d0b4 224
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225
226static int oggvorbis_decode_close(AVCodecContext *avccontext) {
227 OggVorbisContext *context = avccontext->priv_data ;
228
229 vorbis_info_clear(&context->vi) ;
230 vorbis_comment_clear(&context->vc) ;
231
232 return 0 ;
233}
234
235
236AVCodec oggvorbis_decoder = {
237 "vorbis",
238 CODEC_TYPE_AUDIO,
239 CODEC_ID_VORBIS,
240 sizeof(OggVorbisContext),
241 oggvorbis_decode_init,
242 NULL,
243 oggvorbis_decode_close,
244 oggvorbis_decode_frame,
245} ;