Move allocation and init to defaults of the private codec contexts to avcodec_get_con...
[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
29#include "avcodec.h"
2c124cb6 30#include "bytestream.h"
9577838f 31#include "vorbis.h"
81e0d0b4 32
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33#undef NDEBUG
34#include <assert.h>
35
6d8f985e 36#define OGGVORBIS_FRAME_SIZE 64
81e0d0b4 37
6d8f985e 38#define BUFFER_SIZE (1024*64)
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39
40typedef struct OggVorbisContext {
41 vorbis_info vi ;
42 vorbis_dsp_state vd ;
43 vorbis_block vb ;
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44 uint8_t buffer[BUFFER_SIZE];
45 int buffer_index;
9c8f0768 46 int eof;
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47
48 /* decoder */
49 vorbis_comment vc ;
d76f581f 50 ogg_packet op;
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51} OggVorbisContext ;
52
53
5ef251e5 54static av_cold int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
13c71451 55 double cfreq;
c55427f8 56
1ff8f2b3 57 if(avccontext->flags & CODEC_FLAG_QSCALE) {
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58 /* variable bitrate */
59 if(vorbis_encode_setup_vbr(vi, avccontext->channels,
1ff8f2b3 60 avccontext->sample_rate,
05276956 61 avccontext->global_quality / (float)FF_QP2LAMBDA / 10.0))
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62 return -1;
63 } else {
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64 int minrate = avccontext->rc_min_rate > 0 ? avccontext->rc_min_rate : -1;
65 int maxrate = avccontext->rc_min_rate > 0 ? avccontext->rc_max_rate : -1;
66
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67 /* constant bitrate */
68 if(vorbis_encode_setup_managed(vi, avccontext->channels,
e5a5ea9e 69 avccontext->sample_rate, minrate, avccontext->bit_rate, maxrate))
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70 return -1;
71
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72 /* variable bitrate by estimate, disable slow rate management */
73 if(minrate == -1 && maxrate == -1)
74 if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL))
75 return -1;
13c71451 76 }
c55427f8 77
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78 /* cutoff frequency */
79 if(avccontext->cutoff > 0) {
80 cfreq = avccontext->cutoff / 1000.0;
81 if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
82 return -1;
83 }
81e0d0b4 84
13c71451 85 return vorbis_encode_setup_init(vi);
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86}
87
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88/* How many bytes are needed for a buffer of length 'l' */
89static int xiph_len(int l) { return (1 + l / 255 + l); }
90
98a6fff9 91static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
81e0d0b4 92 OggVorbisContext *context = avccontext->priv_data ;
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93 ogg_packet header, header_comm, header_code;
94 uint8_t *p;
fd7242dd 95 unsigned int offset;
81e0d0b4 96
81e0d0b4 97 vorbis_info_init(&context->vi) ;
81e0d0b4 98 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
fb0a835f 99 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed\n") ;
bb270c08 100 return -1 ;
81e0d0b4 101 }
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102 vorbis_analysis_init(&context->vd, &context->vi) ;
103 vorbis_block_init(&context->vd, &context->vb) ;
104
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105 vorbis_comment_init(&context->vc);
106 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
107
108 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
109 &header_comm, &header_code);
115329f1 110
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111 avccontext->extradata_size=
112 1 + xiph_len(header.bytes) + xiph_len(header_comm.bytes) +
113 header_code.bytes;
114 p = avccontext->extradata =
115 av_malloc(avccontext->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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116 p[0] = 2;
117 offset = 1;
118 offset += av_xiphlacing(&p[offset], header.bytes);
119 offset += av_xiphlacing(&p[offset], header_comm.bytes);
120 memcpy(&p[offset], header.packet, header.bytes);
121 offset += header.bytes;
122 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
123 offset += header_comm.bytes;
124 memcpy(&p[offset], header_code.packet, header_code.bytes);
125 offset += header_code.bytes;
fd7242dd 126 assert(offset == avccontext->extradata_size);
115329f1 127
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128/* vorbis_block_clear(&context->vb);
129 vorbis_dsp_clear(&context->vd);
130 vorbis_info_clear(&context->vi);*/
131 vorbis_comment_clear(&context->vc);
115329f1 132
81e0d0b4 133 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
115329f1 134
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135 avccontext->coded_frame= avcodec_alloc_frame();
136 avccontext->coded_frame->key_frame= 1;
115329f1 137
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138 return 0 ;
139}
140
141
3aca208a 142static int oggvorbis_encode_frame(AVCodecContext *avccontext,
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143 unsigned char *packets,
144 int buf_size, void *data)
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145{
146 OggVorbisContext *context = avccontext->priv_data ;
81e0d0b4 147 ogg_packet op ;
0d00cf38 148 signed short *audio = data ;
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149 int l;
150
151 if(data) {
42859ddb 152 const int samples = avccontext->frame_size;
9c8f0768 153 float **buffer ;
9577838f 154 int c, channels = context->vi.channels;
81e0d0b4 155
a6080be7 156 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
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157 for (c = 0; c < channels; c++) {
158 int co = (channels > 8) ? c :
159 ff_vorbis_encoding_channel_layout_offsets[channels-1][c];
a6080be7 160 for(l = 0 ; l < samples ; l++)
9577838f 161 buffer[c][l]=audio[l*channels+co]/32768.f;
bb270c08 162 }
a6080be7 163 vorbis_analysis_wrote(&context->vd, samples) ;
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164 } else {
165 if(!context->eof)
166 vorbis_analysis_wrote(&context->vd, 0) ;
167 context->eof = 1;
168 }
81e0d0b4 169
81e0d0b4 170 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
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171 vorbis_analysis(&context->vb, NULL);
172 vorbis_bitrate_addblock(&context->vb) ;
81e0d0b4 173
bb270c08 174 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
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175 /* i'd love to say the following line is a hack, but sadly it's
176 * not, apparently the end of stream decision is in libogg. */
d99659f0 177 if(op.bytes==1 && op.e_o_s)
6f824977 178 continue;
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179 if (context->buffer_index + sizeof(ogg_packet) + op.bytes > BUFFER_SIZE) {
180 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
181 return -1;
182 }
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183 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
184 context->buffer_index += sizeof(ogg_packet);
185 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
186 context->buffer_index += op.bytes;
187// av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
bb270c08 188 }
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189 }
190
3f4993f1 191 l=0;
6d8f985e 192 if(context->buffer_index){
bbb77e7c 193 ogg_packet *op2= (ogg_packet*)context->buffer;
6d8f985e 194 op2->packet = context->buffer + sizeof(ogg_packet);
3f4993f1 195
6f824977 196 l= op2->bytes;
42661adf 197 avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
3723f01c 198 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
3f4993f1 199
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200 if (l > buf_size) {
201 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
202 return -1;
203 }
204
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205 memcpy(packets, op2->packet, l);
206 context->buffer_index -= l + sizeof(ogg_packet);
1204a13c 207 memmove(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
6d8f985e 208// av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
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209 }
210
3f4993f1 211 return l;
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212}
213
214
98a6fff9 215static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
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216 OggVorbisContext *context = avccontext->priv_data ;
217/* ogg_packet op ; */
115329f1 218
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219 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
220
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221 vorbis_block_clear(&context->vb);
222 vorbis_dsp_clear(&context->vd);
223 vorbis_info_clear(&context->vi);
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224
225 av_freep(&avccontext->coded_frame);
bbb77e7c 226 av_freep(&avccontext->extradata);
115329f1 227
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228 return 0 ;
229}
230
231
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232AVCodec libvorbis_encoder = {
233 "libvorbis",
72415b2a 234 AVMEDIA_TYPE_AUDIO,
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235 CODEC_ID_VORBIS,
236 sizeof(OggVorbisContext),
237 oggvorbis_encode_init,
238 oggvorbis_encode_frame,
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239 oggvorbis_encode_close,
240 .capabilities= CODEC_CAP_DELAY,
b5f09d31 241 .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
fe4bf374 242 .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
3aca208a 243} ;