get rid of the last svn mentions
[libav.git] / libavcodec / libvorbis.c
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1/*
2 * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
e5a389a1 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
983e3246 21/**
ba87f080 22 * @file
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23 * Ogg Vorbis codec support via libvorbisenc.
24 * @author Mark Hills <mark@pogo.org.uk>
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25 */
26
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27#include <vorbis/vorbisenc.h>
28
77336a5e 29#include "libavutil/opt.h"
81e0d0b4 30#include "avcodec.h"
2c124cb6 31#include "bytestream.h"
9577838f 32#include "vorbis.h"
81e0d0b4 33
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34#undef NDEBUG
35#include <assert.h>
36
6d8f985e 37#define OGGVORBIS_FRAME_SIZE 64
81e0d0b4 38
6d8f985e 39#define BUFFER_SIZE (1024*64)
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40
41typedef struct OggVorbisContext {
77336a5e 42 AVClass *av_class;
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43 vorbis_info vi ;
44 vorbis_dsp_state vd ;
45 vorbis_block vb ;
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46 uint8_t buffer[BUFFER_SIZE];
47 int buffer_index;
9c8f0768 48 int eof;
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49
50 /* decoder */
51 vorbis_comment vc ;
d76f581f 52 ogg_packet op;
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53
54 double iblock;
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55} OggVorbisContext ;
56
77336a5e 57static const AVOption options[]={
78c8b4b7 58{"iblock", "Sets the impulse block bias", offsetof(OggVorbisContext, iblock), FF_OPT_TYPE_DOUBLE, 0, -15, 0, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
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59{NULL}
60};
da754858 61static const AVClass class = { "libvorbis", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
81e0d0b4 62
5ef251e5 63static av_cold int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
77336a5e 64 OggVorbisContext *context = avccontext->priv_data ;
13c71451 65 double cfreq;
c55427f8 66
1ff8f2b3 67 if(avccontext->flags & CODEC_FLAG_QSCALE) {
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68 /* variable bitrate */
69 if(vorbis_encode_setup_vbr(vi, avccontext->channels,
1ff8f2b3 70 avccontext->sample_rate,
05276956 71 avccontext->global_quality / (float)FF_QP2LAMBDA / 10.0))
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72 return -1;
73 } else {
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74 int minrate = avccontext->rc_min_rate > 0 ? avccontext->rc_min_rate : -1;
75 int maxrate = avccontext->rc_min_rate > 0 ? avccontext->rc_max_rate : -1;
76
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77 /* constant bitrate */
78 if(vorbis_encode_setup_managed(vi, avccontext->channels,
e5a5ea9e 79 avccontext->sample_rate, minrate, avccontext->bit_rate, maxrate))
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80 return -1;
81
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82 /* variable bitrate by estimate, disable slow rate management */
83 if(minrate == -1 && maxrate == -1)
84 if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL))
85 return -1;
13c71451 86 }
c55427f8 87
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88 /* cutoff frequency */
89 if(avccontext->cutoff > 0) {
90 cfreq = avccontext->cutoff / 1000.0;
91 if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
92 return -1;
93 }
81e0d0b4 94
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95 if(context->iblock){
96 vorbis_encode_ctl(vi, OV_ECTL_IBLOCK_SET, &context->iblock);
97 }
98
13c71451 99 return vorbis_encode_setup_init(vi);
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100}
101
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102/* How many bytes are needed for a buffer of length 'l' */
103static int xiph_len(int l) { return (1 + l / 255 + l); }
104
98a6fff9 105static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
81e0d0b4 106 OggVorbisContext *context = avccontext->priv_data ;
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107 ogg_packet header, header_comm, header_code;
108 uint8_t *p;
fd7242dd 109 unsigned int offset;
81e0d0b4 110
81e0d0b4 111 vorbis_info_init(&context->vi) ;
81e0d0b4 112 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
fb0a835f 113 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed\n") ;
bb270c08 114 return -1 ;
81e0d0b4 115 }
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116 vorbis_analysis_init(&context->vd, &context->vi) ;
117 vorbis_block_init(&context->vd, &context->vb) ;
118
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119 vorbis_comment_init(&context->vc);
120 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
121
122 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
123 &header_comm, &header_code);
115329f1 124
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125 avccontext->extradata_size=
126 1 + xiph_len(header.bytes) + xiph_len(header_comm.bytes) +
127 header_code.bytes;
128 p = avccontext->extradata =
129 av_malloc(avccontext->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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130 p[0] = 2;
131 offset = 1;
132 offset += av_xiphlacing(&p[offset], header.bytes);
133 offset += av_xiphlacing(&p[offset], header_comm.bytes);
134 memcpy(&p[offset], header.packet, header.bytes);
135 offset += header.bytes;
136 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
137 offset += header_comm.bytes;
138 memcpy(&p[offset], header_code.packet, header_code.bytes);
139 offset += header_code.bytes;
fd7242dd 140 assert(offset == avccontext->extradata_size);
115329f1 141
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142/* vorbis_block_clear(&context->vb);
143 vorbis_dsp_clear(&context->vd);
144 vorbis_info_clear(&context->vi);*/
145 vorbis_comment_clear(&context->vc);
115329f1 146
81e0d0b4 147 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
115329f1 148
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149 avccontext->coded_frame= avcodec_alloc_frame();
150 avccontext->coded_frame->key_frame= 1;
115329f1 151
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152 return 0 ;
153}
154
155
3aca208a 156static int oggvorbis_encode_frame(AVCodecContext *avccontext,
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157 unsigned char *packets,
158 int buf_size, void *data)
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159{
160 OggVorbisContext *context = avccontext->priv_data ;
81e0d0b4 161 ogg_packet op ;
0d00cf38 162 signed short *audio = data ;
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163 int l;
164
165 if(data) {
42859ddb 166 const int samples = avccontext->frame_size;
9c8f0768 167 float **buffer ;
9577838f 168 int c, channels = context->vi.channels;
81e0d0b4 169
a6080be7 170 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
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171 for (c = 0; c < channels; c++) {
172 int co = (channels > 8) ? c :
173 ff_vorbis_encoding_channel_layout_offsets[channels-1][c];
a6080be7 174 for(l = 0 ; l < samples ; l++)
9577838f 175 buffer[c][l]=audio[l*channels+co]/32768.f;
bb270c08 176 }
a6080be7 177 vorbis_analysis_wrote(&context->vd, samples) ;
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178 } else {
179 if(!context->eof)
180 vorbis_analysis_wrote(&context->vd, 0) ;
181 context->eof = 1;
182 }
81e0d0b4 183
81e0d0b4 184 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
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185 vorbis_analysis(&context->vb, NULL);
186 vorbis_bitrate_addblock(&context->vb) ;
81e0d0b4 187
bb270c08 188 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
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189 /* i'd love to say the following line is a hack, but sadly it's
190 * not, apparently the end of stream decision is in libogg. */
d99659f0 191 if(op.bytes==1 && op.e_o_s)
6f824977 192 continue;
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193 if (context->buffer_index + sizeof(ogg_packet) + op.bytes > BUFFER_SIZE) {
194 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
195 return -1;
196 }
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197 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
198 context->buffer_index += sizeof(ogg_packet);
199 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
200 context->buffer_index += op.bytes;
201// av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
bb270c08 202 }
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203 }
204
3f4993f1 205 l=0;
6d8f985e 206 if(context->buffer_index){
bbb77e7c 207 ogg_packet *op2= (ogg_packet*)context->buffer;
6d8f985e 208 op2->packet = context->buffer + sizeof(ogg_packet);
3f4993f1 209
6f824977 210 l= op2->bytes;
42661adf 211 avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
3723f01c 212 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
3f4993f1 213
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214 if (l > buf_size) {
215 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
216 return -1;
217 }
218
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219 memcpy(packets, op2->packet, l);
220 context->buffer_index -= l + sizeof(ogg_packet);
1204a13c 221 memmove(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
6d8f985e 222// av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
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223 }
224
3f4993f1 225 return l;
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226}
227
228
98a6fff9 229static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
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230 OggVorbisContext *context = avccontext->priv_data ;
231/* ogg_packet op ; */
115329f1 232
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233 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
234
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235 vorbis_block_clear(&context->vb);
236 vorbis_dsp_clear(&context->vd);
237 vorbis_info_clear(&context->vi);
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238
239 av_freep(&avccontext->coded_frame);
bbb77e7c 240 av_freep(&avccontext->extradata);
115329f1 241
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242 return 0 ;
243}
244
245
d36beb3f 246AVCodec ff_libvorbis_encoder = {
d0d866e0 247 "libvorbis",
72415b2a 248 AVMEDIA_TYPE_AUDIO,
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249 CODEC_ID_VORBIS,
250 sizeof(OggVorbisContext),
251 oggvorbis_encode_init,
252 oggvorbis_encode_frame,
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253 oggvorbis_encode_close,
254 .capabilities= CODEC_CAP_DELAY,
5d6e4c16 255 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
fe4bf374 256 .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
77336a5e 257 .priv_class= &class,
3aca208a 258} ;