006c85224de96b77de2aca32fd51ac65c2ddf58b
[libav.git] / libavcodec / libopencore-amr.c
1 /*
2 * AMR Audio decoder stub
3 * Copyright (c) 2003 the ffmpeg project
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavutil/opt.h"
26 #include "avcodec.h"
27 #include "audio_frame_queue.h"
28 #include "internal.h"
29
30 static int amr_decode_fix_avctx(AVCodecContext *avctx)
31 {
32 const int is_amr_wb = 1 + (avctx->codec_id == AV_CODEC_ID_AMR_WB);
33
34 avctx->sample_rate = 8000 * is_amr_wb;
35
36 if (avctx->channels > 1) {
37 av_log_missing_feature(avctx, "multi-channel AMR", 0);
38 return AVERROR_PATCHWELCOME;
39 }
40
41 avctx->channels = 1;
42 avctx->channel_layout = AV_CH_LAYOUT_MONO;
43 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
44 return 0;
45 }
46
47 #if CONFIG_LIBOPENCORE_AMRNB
48
49 #include <opencore-amrnb/interf_dec.h>
50 #include <opencore-amrnb/interf_enc.h>
51
52 /* Common code for fixed and float version*/
53 typedef struct AMR_bitrates {
54 int rate;
55 enum Mode mode;
56 } AMR_bitrates;
57
58 /* Match desired bitrate */
59 static int get_bitrate_mode(int bitrate, void *log_ctx)
60 {
61 /* make the correspondance between bitrate and mode */
62 static const AMR_bitrates rates[] = {
63 { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
64 { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
65 };
66 int i, best = -1, min_diff = 0;
67 char log_buf[200];
68
69 for (i = 0; i < 8; i++) {
70 if (rates[i].rate == bitrate)
71 return rates[i].mode;
72 if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
73 best = i;
74 min_diff = abs(rates[i].rate - bitrate);
75 }
76 }
77 /* no bitrate matching exactly, log a warning */
78 snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
79 for (i = 0; i < 8; i++)
80 av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f);
81 av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f);
82 av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
83
84 return best;
85 }
86
87 typedef struct AMRContext {
88 AVClass *av_class;
89 AVFrame frame;
90 void *dec_state;
91 void *enc_state;
92 int enc_bitrate;
93 int enc_mode;
94 int enc_dtx;
95 int enc_last_frame;
96 AudioFrameQueue afq;
97 } AMRContext;
98
99 static const AVOption options[] = {
100 { "dtx", "Allow DTX (generate comfort noise)", offsetof(AMRContext, enc_dtx), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
101 { NULL }
102 };
103
104 static const AVClass class = {
105 "libopencore_amrnb", av_default_item_name, options, LIBAVUTIL_VERSION_INT
106 };
107
108 static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
109 {
110 AMRContext *s = avctx->priv_data;
111 int ret;
112
113 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
114 return ret;
115
116 s->dec_state = Decoder_Interface_init();
117 if (!s->dec_state) {
118 av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n");
119 return -1;
120 }
121
122 avcodec_get_frame_defaults(&s->frame);
123 avctx->coded_frame = &s->frame;
124
125 return 0;
126 }
127
128 static av_cold int amr_nb_decode_close(AVCodecContext *avctx)
129 {
130 AMRContext *s = avctx->priv_data;
131
132 Decoder_Interface_exit(s->dec_state);
133
134 return 0;
135 }
136
137 static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
138 int *got_frame_ptr, AVPacket *avpkt)
139 {
140 const uint8_t *buf = avpkt->data;
141 int buf_size = avpkt->size;
142 AMRContext *s = avctx->priv_data;
143 static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
144 enum Mode dec_mode;
145 int packet_size, ret;
146
147 av_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n",
148 buf, buf_size, avctx->frame_number);
149
150 /* get output buffer */
151 s->frame.nb_samples = 160;
152 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
153 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
154 return ret;
155 }
156
157 dec_mode = (buf[0] >> 3) & 0x000F;
158 packet_size = block_size[dec_mode] + 1;
159
160 if (packet_size > buf_size) {
161 av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
162 buf_size, packet_size);
163 return AVERROR_INVALIDDATA;
164 }
165
166 av_dlog(avctx, "packet_size=%d buf= 0x%X %X %X %X\n",
167 packet_size, buf[0], buf[1], buf[2], buf[3]);
168 /* call decoder */
169 Decoder_Interface_Decode(s->dec_state, buf, (short *)s->frame.data[0], 0);
170
171 *got_frame_ptr = 1;
172 *(AVFrame *)data = s->frame;
173
174 return packet_size;
175 }
176
177 AVCodec ff_libopencore_amrnb_decoder = {
178 .name = "libopencore_amrnb",
179 .type = AVMEDIA_TYPE_AUDIO,
180 .id = AV_CODEC_ID_AMR_NB,
181 .priv_data_size = sizeof(AMRContext),
182 .init = amr_nb_decode_init,
183 .close = amr_nb_decode_close,
184 .decode = amr_nb_decode_frame,
185 .capabilities = CODEC_CAP_DR1,
186 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
187 };
188
189 static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
190 {
191 AMRContext *s = avctx->priv_data;
192
193 if (avctx->sample_rate != 8000) {
194 av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
195 return AVERROR(ENOSYS);
196 }
197
198 if (avctx->channels != 1) {
199 av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
200 return AVERROR(ENOSYS);
201 }
202
203 avctx->frame_size = 160;
204 avctx->delay = 50;
205 ff_af_queue_init(avctx, &s->afq);
206 #if FF_API_OLD_ENCODE_AUDIO
207 avctx->coded_frame = avcodec_alloc_frame();
208 if (!avctx->coded_frame)
209 return AVERROR(ENOMEM);
210 #endif
211
212 s->enc_state = Encoder_Interface_init(s->enc_dtx);
213 if (!s->enc_state) {
214 av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
215 av_freep(&avctx->coded_frame);
216 return -1;
217 }
218
219 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
220 s->enc_bitrate = avctx->bit_rate;
221
222 return 0;
223 }
224
225 static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
226 {
227 AMRContext *s = avctx->priv_data;
228
229 Encoder_Interface_exit(s->enc_state);
230 ff_af_queue_close(&s->afq);
231 #if FF_API_OLD_ENCODE_AUDIO
232 av_freep(&avctx->coded_frame);
233 #endif
234 return 0;
235 }
236
237 static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
238 const AVFrame *frame, int *got_packet_ptr)
239 {
240 AMRContext *s = avctx->priv_data;
241 int written, ret;
242 int16_t *flush_buf = NULL;
243 const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL;
244
245 if (s->enc_bitrate != avctx->bit_rate) {
246 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
247 s->enc_bitrate = avctx->bit_rate;
248 }
249
250 if ((ret = ff_alloc_packet(avpkt, 32))) {
251 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
252 return ret;
253 }
254
255 if (frame) {
256 if (frame->nb_samples < avctx->frame_size) {
257 flush_buf = av_mallocz(avctx->frame_size * sizeof(*flush_buf));
258 if (!flush_buf)
259 return AVERROR(ENOMEM);
260 memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf));
261 samples = flush_buf;
262 if (frame->nb_samples < avctx->frame_size - avctx->delay)
263 s->enc_last_frame = -1;
264 }
265 if ((ret = ff_af_queue_add(&s->afq, frame) < 0)) {
266 av_freep(&flush_buf);
267 return ret;
268 }
269 } else {
270 if (s->enc_last_frame < 0)
271 return 0;
272 flush_buf = av_mallocz(avctx->frame_size * sizeof(*flush_buf));
273 if (!flush_buf)
274 return AVERROR(ENOMEM);
275 samples = flush_buf;
276 s->enc_last_frame = -1;
277 }
278
279 written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples,
280 avpkt->data, 0);
281 av_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
282 written, s->enc_mode, frame[0]);
283
284 /* Get the next frame pts/duration */
285 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
286 &avpkt->duration);
287
288 avpkt->size = written;
289 *got_packet_ptr = 1;
290 av_freep(&flush_buf);
291 return 0;
292 }
293
294 AVCodec ff_libopencore_amrnb_encoder = {
295 .name = "libopencore_amrnb",
296 .type = AVMEDIA_TYPE_AUDIO,
297 .id = AV_CODEC_ID_AMR_NB,
298 .priv_data_size = sizeof(AMRContext),
299 .init = amr_nb_encode_init,
300 .encode2 = amr_nb_encode_frame,
301 .close = amr_nb_encode_close,
302 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME,
303 .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
304 AV_SAMPLE_FMT_NONE },
305 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
306 .priv_class = &class,
307 };
308
309 #endif
310
311 /* -----------AMR wideband ------------*/
312 #if CONFIG_LIBOPENCORE_AMRWB
313
314 #include <opencore-amrwb/dec_if.h>
315 #include <opencore-amrwb/if_rom.h>
316
317 typedef struct AMRWBContext {
318 AVFrame frame;
319 void *state;
320 } AMRWBContext;
321
322 static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
323 {
324 AMRWBContext *s = avctx->priv_data;
325 int ret;
326
327 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
328 return ret;
329
330 s->state = D_IF_init();
331
332 avcodec_get_frame_defaults(&s->frame);
333 avctx->coded_frame = &s->frame;
334
335 return 0;
336 }
337
338 static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
339 int *got_frame_ptr, AVPacket *avpkt)
340 {
341 const uint8_t *buf = avpkt->data;
342 int buf_size = avpkt->size;
343 AMRWBContext *s = avctx->priv_data;
344 int mode, ret;
345 int packet_size;
346 static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
347
348 /* get output buffer */
349 s->frame.nb_samples = 320;
350 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
351 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
352 return ret;
353 }
354
355 mode = (buf[0] >> 3) & 0x000F;
356 packet_size = block_size[mode];
357
358 if (packet_size > buf_size) {
359 av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
360 buf_size, packet_size + 1);
361 return AVERROR_INVALIDDATA;
362 }
363
364 D_IF_decode(s->state, buf, (short *)s->frame.data[0], _good_frame);
365
366 *got_frame_ptr = 1;
367 *(AVFrame *)data = s->frame;
368
369 return packet_size;
370 }
371
372 static int amr_wb_decode_close(AVCodecContext *avctx)
373 {
374 AMRWBContext *s = avctx->priv_data;
375
376 D_IF_exit(s->state);
377 return 0;
378 }
379
380 AVCodec ff_libopencore_amrwb_decoder = {
381 .name = "libopencore_amrwb",
382 .type = AVMEDIA_TYPE_AUDIO,
383 .id = AV_CODEC_ID_AMR_WB,
384 .priv_data_size = sizeof(AMRWBContext),
385 .init = amr_wb_decode_init,
386 .close = amr_wb_decode_close,
387 .decode = amr_wb_decode_frame,
388 .capabilities = CODEC_CAP_DR1,
389 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"),
390 };
391
392 #endif /* CONFIG_LIBOPENCORE_AMRWB */