ab1f89aad7f3c854842e3c1dfdd7095eb44556cd
[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 FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "avcodec.h"
23
24 static void amr_decode_fix_avctx(AVCodecContext *avctx)
25 {
26 const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
27
28 if (!avctx->sample_rate)
29 avctx->sample_rate = 8000 * is_amr_wb;
30
31 if (!avctx->channels)
32 avctx->channels = 1;
33
34 avctx->frame_size = 160 * is_amr_wb;
35 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
36 }
37
38 #if CONFIG_LIBOPENCORE_AMRNB
39
40 #include <opencore-amrnb/interf_dec.h>
41 #include <opencore-amrnb/interf_enc.h>
42
43 static const char nb_bitrate_unsupported[] =
44 "bitrate not supported: use one of 4.75k, 5.15k, 5.9k, 6.7k, 7.4k, 7.95k, 10.2k or 12.2k\n";
45
46 /* Common code for fixed and float version*/
47 typedef struct AMR_bitrates {
48 int rate;
49 enum Mode mode;
50 } AMR_bitrates;
51
52 /* Match desired bitrate */
53 static int getBitrateMode(int bitrate)
54 {
55 /* make the correspondance between bitrate and mode */
56 AMR_bitrates rates[] = { { 4750, MR475},
57 { 5150, MR515},
58 { 5900, MR59},
59 { 6700, MR67},
60 { 7400, MR74},
61 { 7950, MR795},
62 {10200, MR102},
63 {12200, MR122}, };
64 int i;
65
66 for (i = 0; i < 8; i++)
67 if (rates[i].rate == bitrate)
68 return rates[i].mode;
69 /* no bitrate matching, return an error */
70 return -1;
71 }
72
73 typedef struct AMRContext {
74 int frameCount;
75 void *decState;
76 int *enstate;
77 int enc_bitrate;
78 } AMRContext;
79
80 static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
81 {
82 AMRContext *s = avctx->priv_data;
83
84 s->frameCount = 0;
85 s->decState = Decoder_Interface_init();
86 if (!s->decState) {
87 av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\r\n");
88 return -1;
89 }
90
91 amr_decode_fix_avctx(avctx);
92
93 if (avctx->channels > 1) {
94 av_log(avctx, AV_LOG_ERROR, "amr_nb: multichannel decoding not supported\n");
95 return -1;
96 }
97
98 return 0;
99 }
100
101 static av_cold int amr_nb_decode_close(AVCodecContext *avctx)
102 {
103 AMRContext *s = avctx->priv_data;
104
105 Decoder_Interface_exit(s->decState);
106 return 0;
107 }
108
109 static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
110 int *data_size, AVPacket *avpkt)
111 {
112 const uint8_t *buf = avpkt->data;
113 int buf_size = avpkt->size;
114 AMRContext *s = avctx->priv_data;
115 const uint8_t *amrData = buf;
116 static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
117 enum Mode dec_mode;
118 int packet_size;
119
120 /* av_log(NULL, AV_LOG_DEBUG, "amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",
121 buf, buf_size, s->frameCount); */
122
123 dec_mode = (buf[0] >> 3) & 0x000F;
124 packet_size = block_size[dec_mode] + 1;
125
126 if (packet_size > buf_size) {
127 av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
128 buf_size, packet_size);
129 return -1;
130 }
131
132 s->frameCount++;
133 /* av_log(NULL, AV_LOG_DEBUG, "packet_size=%d amrData= 0x%X %X %X %X\n",
134 packet_size, amrData[0], amrData[1], amrData[2], amrData[3]); */
135 /* call decoder */
136 Decoder_Interface_Decode(s->decState, amrData, data, 0);
137 *data_size = 160 * 2;
138
139 return packet_size;
140 }
141
142 AVCodec libopencore_amrnb_decoder = {
143 "libopencore_amrnb",
144 AVMEDIA_TYPE_AUDIO,
145 CODEC_ID_AMR_NB,
146 sizeof(AMRContext),
147 amr_nb_decode_init,
148 NULL,
149 amr_nb_decode_close,
150 amr_nb_decode_frame,
151 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
152 };
153
154 static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
155 {
156 AMRContext *s = avctx->priv_data;
157
158 s->frameCount = 0;
159
160 if (avctx->sample_rate != 8000) {
161 av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
162 return -1;
163 }
164
165 if (avctx->channels != 1) {
166 av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
167 return -1;
168 }
169
170 avctx->frame_size = 160;
171 avctx->coded_frame = avcodec_alloc_frame();
172
173 s->enstate=Encoder_Interface_init(0);
174 if (!s->enstate) {
175 av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
176 return -1;
177 }
178
179 if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {
180 av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
181 return -1;
182 }
183
184 return 0;
185 }
186
187 static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
188 {
189 AMRContext *s = avctx->priv_data;
190
191 Encoder_Interface_exit(s->enstate);
192 av_freep(&avctx->coded_frame);
193 return 0;
194 }
195
196 static int amr_nb_encode_frame(AVCodecContext *avctx,
197 unsigned char *frame/*out*/,
198 int buf_size, void *data/*in*/)
199 {
200 AMRContext *s = avctx->priv_data;
201 int written;
202
203 if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {
204 av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
205 return -1;
206 }
207
208 written = Encoder_Interface_Encode(s->enstate, s->enc_bitrate, data,
209 frame, 0);
210 /* av_log(NULL, AV_LOG_DEBUG, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
211 written, s->enc_bitrate, frame[0] ); */
212
213 return written;
214 }
215
216 AVCodec libopencore_amrnb_encoder = {
217 "libopencore_amrnb",
218 AVMEDIA_TYPE_AUDIO,
219 CODEC_ID_AMR_NB,
220 sizeof(AMRContext),
221 amr_nb_encode_init,
222 amr_nb_encode_frame,
223 amr_nb_encode_close,
224 NULL,
225 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
226 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
227 };
228
229 #endif
230
231 /* -----------AMR wideband ------------*/
232 #if CONFIG_LIBOPENCORE_AMRWB
233
234 #ifdef _TYPEDEF_H
235 //To avoid duplicate typedefs from typedef in amr-nb
236 #define typedef_h
237 #endif
238
239 #include <opencore-amrwb/dec_if.h>
240 #include <opencore-amrwb/if_rom.h>
241
242 static const char wb_bitrate_unsupported[] =
243 "bitrate not supported: use one of 6.6k, 8.85k, 12.65k, 14.25k, 15.85k, 18.25k, 19.85k, 23.05k, or 23.85k\n";
244
245 /* Common code for fixed and float version*/
246 typedef struct AMRWB_bitrates {
247 int rate;
248 int mode;
249 } AMRWB_bitrates;
250
251 typedef struct AMRWBContext {
252 int frameCount;
253 void *state;
254 int mode;
255 Word16 allow_dtx;
256 } AMRWBContext;
257
258 static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
259 {
260 AMRWBContext *s = avctx->priv_data;
261
262 s->frameCount = 0;
263 s->state = D_IF_init();
264
265 amr_decode_fix_avctx(avctx);
266
267 if (avctx->channels > 1) {
268 av_log(avctx, AV_LOG_ERROR, "amr_wb: multichannel decoding not supported\n");
269 return -1;
270 }
271
272 return 0;
273 }
274
275 static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
276 int *data_size, AVPacket *avpkt)
277 {
278 const uint8_t *buf = avpkt->data;
279 int buf_size = avpkt->size;
280 AMRWBContext *s = avctx->priv_data;
281 const uint8_t *amrData = buf;
282 int mode;
283 int packet_size;
284 static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
285
286 if (!buf_size)
287 /* nothing to do */
288 return 0;
289
290 mode = (amrData[0] >> 3) & 0x000F;
291 packet_size = block_size[mode];
292
293 if (packet_size > buf_size) {
294 av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
295 buf_size, packet_size + 1);
296 return -1;
297 }
298
299 s->frameCount++;
300 D_IF_decode(s->state, amrData, data, _good_frame);
301 *data_size = 320 * 2;
302 return packet_size;
303 }
304
305 static int amr_wb_decode_close(AVCodecContext *avctx)
306 {
307 AMRWBContext *s = avctx->priv_data;
308
309 D_IF_exit(s->state);
310 return 0;
311 }
312
313 AVCodec libopencore_amrwb_decoder = {
314 "libopencore_amrwb",
315 AVMEDIA_TYPE_AUDIO,
316 CODEC_ID_AMR_WB,
317 sizeof(AMRWBContext),
318 amr_wb_decode_init,
319 NULL,
320 amr_wb_decode_close,
321 amr_wb_decode_frame,
322 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Wide-Band"),
323 };
324
325 #endif /* CONFIG_LIBOPENCORE_AMRWB */