libvorbis: Give consistent names to all functions, structs, and defines
[libav.git] / libavcodec / libvorbis.c
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04d7f601
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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
04d7f601
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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
eb35ef29 23 * Vorbis encoding support via libvorbisenc.
983e3246 24 * @author Mark Hills <mark@pogo.org.uk>
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25 */
26
81e0d0b4
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27#include <vorbis/vorbisenc.h>
28
592c4dbc 29#include "libavutil/fifo.h"
77336a5e 30#include "libavutil/opt.h"
81e0d0b4 31#include "avcodec.h"
e5aab2d7 32#include "audio_frame_queue.h"
2c124cb6 33#include "bytestream.h"
91a28b0e 34#include "internal.h"
9577838f 35#include "vorbis.h"
e5aab2d7 36#include "vorbis_parser.h"
81e0d0b4 37
3f4993f1
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38#undef NDEBUG
39#include <assert.h>
40
eb35ef29
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41/* Number of samples the user should send in each call.
42 * This value is used because it is the LCD of all possible frame sizes, so
43 * an output packet will always start at the same point as one of the input
44 * packets.
45 */
dc9e05e2 46#define LIBVORBIS_FRAME_SIZE 64
81e0d0b4 47
ca5ab8cd 48#define BUFFER_SIZE (1024 * 64)
81e0d0b4 49
dc9e05e2 50typedef struct LibvorbisContext {
eb35ef29
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51 AVClass *av_class; /**< class for AVOptions */
52 vorbis_info vi; /**< vorbis_info used during init */
53 vorbis_dsp_state vd; /**< DSP state used for analysis */
54 vorbis_block vb; /**< vorbis_block used for analysis */
592c4dbc 55 AVFifoBuffer *pkt_fifo; /**< output packet buffer */
eb35ef29 56 int eof; /**< end-of-file flag */
f15c4281 57 int dsp_initialized; /**< vd has been initialized */
eb35ef29
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58 vorbis_comment vc; /**< VorbisComment info */
59 ogg_packet op; /**< ogg packet */
60 double iblock; /**< impulse block bias option */
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61 VorbisParseContext vp; /**< parse context to get durations */
62 AudioFrameQueue afq; /**< frame queue for timestamps */
dc9e05e2 63} LibvorbisContext;
81e0d0b4 64
ca5ab8cd 65static const AVOption options[] = {
dc9e05e2 66 { "iblock", "Sets the impulse block bias", offsetof(LibvorbisContext, iblock), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, -15, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
ca5ab8cd 67 { NULL }
77336a5e 68};
147ff24a
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69
70static const AVCodecDefault defaults[] = {
71 { "b", "0" },
72 { NULL },
73};
74
da754858 75static const AVClass class = { "libvorbis", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
81e0d0b4 76
eb35ef29 77
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78static int vorbis_error_to_averror(int ov_err)
79{
80 switch (ov_err) {
81 case OV_EFAULT: return AVERROR_BUG;
82 case OV_EINVAL: return AVERROR(EINVAL);
83 case OV_EIMPL: return AVERROR(EINVAL);
84 default: return AVERROR_UNKNOWN;
85 }
86}
87
dc9e05e2 88static av_cold int libvorbis_setup(vorbis_info *vi, AVCodecContext *avctx)
ca5ab8cd 89{
dc9e05e2 90 LibvorbisContext *s = avctx->priv_data;
13c71451 91 double cfreq;
6f600ab3 92 int ret;
c55427f8 93
147ff24a 94 if (avctx->flags & CODEC_FLAG_QSCALE || !avctx->bit_rate) {
eb35ef29
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95 /* variable bitrate
96 * NOTE: we use the oggenc range of -1 to 10 for global_quality for
147ff24a 97 * user convenience, but libvorbis uses -0.1 to 1.0.
eb35ef29
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98 */
99 float q = avctx->global_quality / (float)FF_QP2LAMBDA;
147ff24a
JR
100 /* default to 3 if the user did not set quality or bitrate */
101 if (!(avctx->flags & CODEC_FLAG_QSCALE))
102 q = 3.0;
eb35ef29
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103 if ((ret = vorbis_encode_setup_vbr(vi, avctx->channels,
104 avctx->sample_rate,
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105 q / 10.0)))
106 goto error;
13c71451 107 } else {
eb35ef29 108 int minrate = avctx->rc_min_rate > 0 ? avctx->rc_min_rate : -1;
182d4f1f 109 int maxrate = avctx->rc_max_rate > 0 ? avctx->rc_max_rate : -1;
e5a5ea9e 110
eb35ef29
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111 /* average bitrate */
112 if ((ret = vorbis_encode_setup_managed(vi, avctx->channels,
182d4f1f
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113 avctx->sample_rate, maxrate,
114 avctx->bit_rate, minrate)))
6f600ab3 115 goto error;
13c71451 116
57ebbccf 117 /* variable bitrate by estimate, disable slow rate management */
ca5ab8cd 118 if (minrate == -1 && maxrate == -1)
6f600ab3
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119 if ((ret = vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL)))
120 goto error;
13c71451 121 }
c55427f8 122
13c71451 123 /* cutoff frequency */
eb35ef29
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124 if (avctx->cutoff > 0) {
125 cfreq = avctx->cutoff / 1000.0;
6f600ab3
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126 if ((ret = vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq)))
127 goto error;
13c71451 128 }
81e0d0b4 129
eb35ef29
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130 /* impulse block bias */
131 if (s->iblock) {
132 if ((ret = vorbis_encode_ctl(vi, OV_ECTL_IBLOCK_SET, &s->iblock)))
6f600ab3 133 goto error;
77336a5e
MN
134 }
135
6f600ab3
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136 if ((ret = vorbis_encode_setup_init(vi)))
137 goto error;
138
139 return 0;
140error:
141 return vorbis_error_to_averror(ret);
81e0d0b4
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142}
143
fd7242dd 144/* How many bytes are needed for a buffer of length 'l' */
ca5ab8cd
DB
145static int xiph_len(int l)
146{
d4b63054 147 return 1 + l / 255 + l;
ca5ab8cd 148}
fd7242dd 149
dc9e05e2 150static av_cold int libvorbis_encode_close(AVCodecContext *avctx)
6f600ab3 151{
dc9e05e2 152 LibvorbisContext *s = avctx->priv_data;
6f600ab3 153
eb35ef29 154 /* notify vorbisenc this is EOF */
f15c4281
JR
155 if (s->dsp_initialized)
156 vorbis_analysis_wrote(&s->vd, 0);
6f600ab3 157
eb35ef29
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158 vorbis_block_clear(&s->vb);
159 vorbis_dsp_clear(&s->vd);
160 vorbis_info_clear(&s->vi);
6f600ab3 161
592c4dbc 162 av_fifo_free(s->pkt_fifo);
e5aab2d7 163 ff_af_queue_close(&s->afq);
eb35ef29 164 av_freep(&avctx->extradata);
6f600ab3
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165
166 return 0;
167}
168
dc9e05e2 169static av_cold int libvorbis_encode_init(AVCodecContext *avctx)
ca5ab8cd 170{
dc9e05e2 171 LibvorbisContext *s = avctx->priv_data;
bbb77e7c
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172 ogg_packet header, header_comm, header_code;
173 uint8_t *p;
fd7242dd 174 unsigned int offset;
6f600ab3 175 int ret;
81e0d0b4 176
eb35ef29 177 vorbis_info_init(&s->vi);
dc9e05e2 178 if ((ret = libvorbis_setup(&s->vi, avctx))) {
a45a1ea5 179 av_log(avctx, AV_LOG_ERROR, "encoder setup failed\n");
6f600ab3
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180 goto error;
181 }
eb35ef29 182 if ((ret = vorbis_analysis_init(&s->vd, &s->vi))) {
a45a1ea5 183 av_log(avctx, AV_LOG_ERROR, "analysis init failed\n");
6f600ab3
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184 ret = vorbis_error_to_averror(ret);
185 goto error;
186 }
f15c4281 187 s->dsp_initialized = 1;
eb35ef29 188 if ((ret = vorbis_block_init(&s->vd, &s->vb))) {
a45a1ea5 189 av_log(avctx, AV_LOG_ERROR, "dsp init failed\n");
6f600ab3
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190 ret = vorbis_error_to_averror(ret);
191 goto error;
81e0d0b4 192 }
81e0d0b4 193
eb35ef29
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194 vorbis_comment_init(&s->vc);
195 vorbis_comment_add_tag(&s->vc, "encoder", LIBAVCODEC_IDENT);
bbb77e7c 196
eb35ef29
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197 if ((ret = vorbis_analysis_headerout(&s->vd, &s->vc, &header, &header_comm,
198 &header_code))) {
6f600ab3
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199 ret = vorbis_error_to_averror(ret);
200 goto error;
201 }
115329f1 202
eb35ef29
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203 avctx->extradata_size = 1 + xiph_len(header.bytes) +
204 xiph_len(header_comm.bytes) +
205 header_code.bytes;
206 p = avctx->extradata = av_malloc(avctx->extradata_size +
207 FF_INPUT_BUFFER_PADDING_SIZE);
6f600ab3
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208 if (!p) {
209 ret = AVERROR(ENOMEM);
210 goto error;
211 }
ca5ab8cd
DB
212 p[0] = 2;
213 offset = 1;
ad2b531d
MR
214 offset += av_xiphlacing(&p[offset], header.bytes);
215 offset += av_xiphlacing(&p[offset], header_comm.bytes);
216 memcpy(&p[offset], header.packet, header.bytes);
217 offset += header.bytes;
218 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
219 offset += header_comm.bytes;
220 memcpy(&p[offset], header_code.packet, header_code.bytes);
221 offset += header_code.bytes;
eb35ef29 222 assert(offset == avctx->extradata_size);
115329f1 223
e5aab2d7
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224 if ((ret = avpriv_vorbis_parse_extradata(avctx, &s->vp)) < 0) {
225 av_log(avctx, AV_LOG_ERROR, "invalid extradata\n");
226 return ret;
227 }
228
eb35ef29 229 vorbis_comment_clear(&s->vc);
115329f1 230
dc9e05e2 231 avctx->frame_size = LIBVORBIS_FRAME_SIZE;
e5aab2d7 232 ff_af_queue_init(avctx, &s->afq);
115329f1 233
592c4dbc
JR
234 s->pkt_fifo = av_fifo_alloc(BUFFER_SIZE);
235 if (!s->pkt_fifo) {
236 ret = AVERROR(ENOMEM);
237 goto error;
238 }
239
ca5ab8cd 240 return 0;
6f600ab3 241error:
dc9e05e2 242 libvorbis_encode_close(avctx);
6f600ab3 243 return ret;
81e0d0b4
MH
244}
245
dc9e05e2 246static int libvorbis_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
e5aab2d7 247 const AVFrame *frame, int *got_packet_ptr)
81e0d0b4 248{
dc9e05e2 249 LibvorbisContext *s = avctx->priv_data;
ca5ab8cd 250 ogg_packet op;
e5aab2d7 251 int ret, duration;
9c8f0768 252
eb35ef29 253 /* send samples to libvorbis */
e5aab2d7 254 if (frame) {
e5aab2d7 255 const int samples = frame->nb_samples;
ca5ab8cd 256 float **buffer;
eb35ef29 257 int c, channels = s->vi.channels;
81e0d0b4 258
eb35ef29 259 buffer = vorbis_analysis_buffer(&s->vd, samples);
9577838f
JD
260 for (c = 0; c < channels; c++) {
261 int co = (channels > 8) ? c :
ca5ab8cd 262 ff_vorbis_encoding_channel_layout_offsets[channels - 1][c];
cfc0a80a
JR
263 memcpy(buffer[c], frame->extended_data[co],
264 samples * sizeof(*buffer[c]));
bb270c08 265 }
a45a1ea5
JR
266 if ((ret = vorbis_analysis_wrote(&s->vd, samples)) < 0) {
267 av_log(avctx, AV_LOG_ERROR, "error in vorbis_analysis_wrote()\n");
94025d8a 268 return vorbis_error_to_averror(ret);
a45a1ea5 269 }
1d7ffd06 270 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
e5aab2d7 271 return ret;
9c8f0768 272 } else {
eb35ef29 273 if (!s->eof)
a45a1ea5
JR
274 if ((ret = vorbis_analysis_wrote(&s->vd, 0)) < 0) {
275 av_log(avctx, AV_LOG_ERROR, "error in vorbis_analysis_wrote()\n");
94025d8a 276 return vorbis_error_to_averror(ret);
a45a1ea5 277 }
eb35ef29 278 s->eof = 1;
9c8f0768 279 }
81e0d0b4 280
eb35ef29 281 /* retrieve available packets from libvorbis */
94025d8a
JR
282 while ((ret = vorbis_analysis_blockout(&s->vd, &s->vb)) == 1) {
283 if ((ret = vorbis_analysis(&s->vb, NULL)) < 0)
284 break;
285 if ((ret = vorbis_bitrate_addblock(&s->vb)) < 0)
286 break;
81e0d0b4 287
eb35ef29 288 /* add any available packets to the output packet buffer */
94025d8a 289 while ((ret = vorbis_bitrate_flushpacket(&s->vd, &op)) == 1) {
592c4dbc 290 if (av_fifo_space(s->pkt_fifo) < sizeof(ogg_packet) + op.bytes) {
a45a1ea5
JR
291 av_log(avctx, AV_LOG_ERROR, "packet buffer is too small");
292 return AVERROR_BUG;
c426562c 293 }
592c4dbc
JR
294 av_fifo_generic_write(s->pkt_fifo, &op, sizeof(ogg_packet), NULL);
295 av_fifo_generic_write(s->pkt_fifo, op.packet, op.bytes, NULL);
bb270c08 296 }
a45a1ea5
JR
297 if (ret < 0) {
298 av_log(avctx, AV_LOG_ERROR, "error getting available packets\n");
94025d8a 299 break;
a45a1ea5 300 }
81e0d0b4 301 }
a45a1ea5
JR
302 if (ret < 0) {
303 av_log(avctx, AV_LOG_ERROR, "error getting available packets\n");
94025d8a 304 return vorbis_error_to_averror(ret);
a45a1ea5 305 }
81e0d0b4 306
e5aab2d7
JR
307 /* check for available packets */
308 if (av_fifo_size(s->pkt_fifo) < sizeof(ogg_packet))
309 return 0;
310
311 av_fifo_generic_read(s->pkt_fifo, &op, sizeof(ogg_packet), NULL);
312
313 if ((ret = ff_alloc_packet(avpkt, op.bytes))) {
314 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
315 return ret;
316 }
317 av_fifo_generic_read(s->pkt_fifo, avpkt->data, op.bytes, NULL);
318
319 avpkt->pts = ff_samples_to_time_base(avctx, op.granulepos);
320
321 duration = avpriv_vorbis_parse_frame(&s->vp, avpkt->data, avpkt->size);
322 if (duration > 0) {
323 /* we do not know encoder delay until we get the first packet from
324 * libvorbis, so we have to update the AudioFrameQueue counts */
325 if (!avctx->delay) {
326 avctx->delay = duration;
327 s->afq.remaining_delay += duration;
328 s->afq.remaining_samples += duration;
c426562c 329 }
e5aab2d7 330 ff_af_queue_remove(&s->afq, duration, &avpkt->pts, &avpkt->duration);
6d8f985e
MN
331 }
332
e5aab2d7
JR
333 *got_packet_ptr = 1;
334 return 0;
81e0d0b4
MH
335}
336
d36beb3f 337AVCodec ff_libvorbis_encoder = {
86714887 338 .name = "libvorbis",
b2bed932 339 .long_name = NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
86714887 340 .type = AVMEDIA_TYPE_AUDIO,
36ef5369 341 .id = AV_CODEC_ID_VORBIS,
dc9e05e2
DB
342 .priv_data_size = sizeof(LibvorbisContext),
343 .init = libvorbis_encode_init,
344 .encode2 = libvorbis_encode_frame,
345 .close = libvorbis_encode_close,
86714887 346 .capabilities = CODEC_CAP_DELAY,
cfc0a80a 347 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
eb35ef29 348 AV_SAMPLE_FMT_NONE },
86714887 349 .priv_class = &class,
147ff24a 350 .defaults = defaults,
86714887 351};