Use explicit struct initializers for AVOutputFormat/AVInputFormat declarations.
[libav.git] / libavcodec / libvorbis.c
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1/*
2 * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav 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 *
2912e87a 11 * Libav 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
2912e87a 17 * License along with Libav; 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"
954a6532 33#include "libavutil/mathematics.h"
81e0d0b4 34
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35#undef NDEBUG
36#include <assert.h>
37
6d8f985e 38#define OGGVORBIS_FRAME_SIZE 64
81e0d0b4 39
6d8f985e 40#define BUFFER_SIZE (1024*64)
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41
42typedef struct OggVorbisContext {
77336a5e 43 AVClass *av_class;
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44 vorbis_info vi ;
45 vorbis_dsp_state vd ;
46 vorbis_block vb ;
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47 uint8_t buffer[BUFFER_SIZE];
48 int buffer_index;
9c8f0768 49 int eof;
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50
51 /* decoder */
52 vorbis_comment vc ;
d76f581f 53 ogg_packet op;
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54
55 double iblock;
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56} OggVorbisContext ;
57
77336a5e 58static const AVOption options[]={
b6675279 59{"iblock", "Sets the impulse block bias", offsetof(OggVorbisContext, iblock), FF_OPT_TYPE_DOUBLE, {.dbl = 0}, -15, 0, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
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60{NULL}
61};
da754858 62static const AVClass class = { "libvorbis", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
81e0d0b4 63
5ef251e5 64static av_cold int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
77336a5e 65 OggVorbisContext *context = avccontext->priv_data ;
13c71451 66 double cfreq;
c55427f8 67
1ff8f2b3 68 if(avccontext->flags & CODEC_FLAG_QSCALE) {
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69 /* variable bitrate */
70 if(vorbis_encode_setup_vbr(vi, avccontext->channels,
1ff8f2b3 71 avccontext->sample_rate,
05276956 72 avccontext->global_quality / (float)FF_QP2LAMBDA / 10.0))
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73 return -1;
74 } else {
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75 int minrate = avccontext->rc_min_rate > 0 ? avccontext->rc_min_rate : -1;
76 int maxrate = avccontext->rc_min_rate > 0 ? avccontext->rc_max_rate : -1;
77
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78 /* constant bitrate */
79 if(vorbis_encode_setup_managed(vi, avccontext->channels,
e5a5ea9e 80 avccontext->sample_rate, minrate, avccontext->bit_rate, maxrate))
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81 return -1;
82
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83 /* variable bitrate by estimate, disable slow rate management */
84 if(minrate == -1 && maxrate == -1)
85 if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL))
86 return -1;
13c71451 87 }
c55427f8 88
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89 /* cutoff frequency */
90 if(avccontext->cutoff > 0) {
91 cfreq = avccontext->cutoff / 1000.0;
92 if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
93 return -1;
94 }
81e0d0b4 95
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96 if(context->iblock){
97 vorbis_encode_ctl(vi, OV_ECTL_IBLOCK_SET, &context->iblock);
98 }
99
13c71451 100 return vorbis_encode_setup_init(vi);
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101}
102
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103/* How many bytes are needed for a buffer of length 'l' */
104static int xiph_len(int l) { return (1 + l / 255 + l); }
105
98a6fff9 106static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
81e0d0b4 107 OggVorbisContext *context = avccontext->priv_data ;
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108 ogg_packet header, header_comm, header_code;
109 uint8_t *p;
fd7242dd 110 unsigned int offset;
81e0d0b4 111
81e0d0b4 112 vorbis_info_init(&context->vi) ;
81e0d0b4 113 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
fb0a835f 114 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed\n") ;
bb270c08 115 return -1 ;
81e0d0b4 116 }
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117 vorbis_analysis_init(&context->vd, &context->vi) ;
118 vorbis_block_init(&context->vd, &context->vb) ;
119
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120 vorbis_comment_init(&context->vc);
121 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
122
123 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
124 &header_comm, &header_code);
115329f1 125
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126 avccontext->extradata_size=
127 1 + xiph_len(header.bytes) + xiph_len(header_comm.bytes) +
128 header_code.bytes;
129 p = avccontext->extradata =
130 av_malloc(avccontext->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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131 p[0] = 2;
132 offset = 1;
133 offset += av_xiphlacing(&p[offset], header.bytes);
134 offset += av_xiphlacing(&p[offset], header_comm.bytes);
135 memcpy(&p[offset], header.packet, header.bytes);
136 offset += header.bytes;
137 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
138 offset += header_comm.bytes;
139 memcpy(&p[offset], header_code.packet, header_code.bytes);
140 offset += header_code.bytes;
fd7242dd 141 assert(offset == avccontext->extradata_size);
115329f1 142
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143/* vorbis_block_clear(&context->vb);
144 vorbis_dsp_clear(&context->vd);
145 vorbis_info_clear(&context->vi);*/
146 vorbis_comment_clear(&context->vc);
115329f1 147
81e0d0b4 148 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
115329f1 149
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150 avccontext->coded_frame= avcodec_alloc_frame();
151 avccontext->coded_frame->key_frame= 1;
115329f1 152
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153 return 0 ;
154}
155
156
3aca208a 157static int oggvorbis_encode_frame(AVCodecContext *avccontext,
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158 unsigned char *packets,
159 int buf_size, void *data)
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160{
161 OggVorbisContext *context = avccontext->priv_data ;
81e0d0b4 162 ogg_packet op ;
0d00cf38 163 signed short *audio = data ;
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164 int l;
165
166 if(data) {
42859ddb 167 const int samples = avccontext->frame_size;
9c8f0768 168 float **buffer ;
9577838f 169 int c, channels = context->vi.channels;
81e0d0b4 170
a6080be7 171 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
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172 for (c = 0; c < channels; c++) {
173 int co = (channels > 8) ? c :
174 ff_vorbis_encoding_channel_layout_offsets[channels-1][c];
a6080be7 175 for(l = 0 ; l < samples ; l++)
9577838f 176 buffer[c][l]=audio[l*channels+co]/32768.f;
bb270c08 177 }
a6080be7 178 vorbis_analysis_wrote(&context->vd, samples) ;
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179 } else {
180 if(!context->eof)
181 vorbis_analysis_wrote(&context->vd, 0) ;
182 context->eof = 1;
183 }
81e0d0b4 184
81e0d0b4 185 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
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186 vorbis_analysis(&context->vb, NULL);
187 vorbis_bitrate_addblock(&context->vb) ;
81e0d0b4 188
bb270c08 189 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
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190 /* i'd love to say the following line is a hack, but sadly it's
191 * not, apparently the end of stream decision is in libogg. */
d99659f0 192 if(op.bytes==1 && op.e_o_s)
6f824977 193 continue;
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194 if (context->buffer_index + sizeof(ogg_packet) + op.bytes > BUFFER_SIZE) {
195 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
196 return -1;
197 }
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198 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
199 context->buffer_index += sizeof(ogg_packet);
200 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
201 context->buffer_index += op.bytes;
202// av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
bb270c08 203 }
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204 }
205
3f4993f1 206 l=0;
6d8f985e 207 if(context->buffer_index){
bbb77e7c 208 ogg_packet *op2= (ogg_packet*)context->buffer;
6d8f985e 209 op2->packet = context->buffer + sizeof(ogg_packet);
3f4993f1 210
6f824977 211 l= op2->bytes;
42661adf 212 avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
3723f01c 213 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
3f4993f1 214
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215 if (l > buf_size) {
216 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
217 return -1;
218 }
219
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220 memcpy(packets, op2->packet, l);
221 context->buffer_index -= l + sizeof(ogg_packet);
1204a13c 222 memmove(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
6d8f985e 223// av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
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224 }
225
3f4993f1 226 return l;
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227}
228
229
98a6fff9 230static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
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231 OggVorbisContext *context = avccontext->priv_data ;
232/* ogg_packet op ; */
115329f1 233
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234 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
235
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236 vorbis_block_clear(&context->vb);
237 vorbis_dsp_clear(&context->vd);
238 vorbis_info_clear(&context->vi);
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239
240 av_freep(&avccontext->coded_frame);
bbb77e7c 241 av_freep(&avccontext->extradata);
115329f1 242
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243 return 0 ;
244}
245
246
d36beb3f 247AVCodec ff_libvorbis_encoder = {
d0d866e0 248 "libvorbis",
72415b2a 249 AVMEDIA_TYPE_AUDIO,
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250 CODEC_ID_VORBIS,
251 sizeof(OggVorbisContext),
252 oggvorbis_encode_init,
253 oggvorbis_encode_frame,
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254 oggvorbis_encode_close,
255 .capabilities= CODEC_CAP_DELAY,
5d6e4c16 256 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
fe4bf374 257 .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
77336a5e 258 .priv_class= &class,
3aca208a 259} ;