lavc: use designated initialisers for all codecs.
[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 "avcodec.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/opt.h"
25
26 static void amr_decode_fix_avctx(AVCodecContext *avctx)
27 {
28 const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
29
30 if (!avctx->sample_rate)
31 avctx->sample_rate = 8000 * is_amr_wb;
32
33 if (!avctx->channels)
34 avctx->channels = 1;
35
36 avctx->frame_size = 160 * is_amr_wb;
37 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
38 }
39
40 #if CONFIG_LIBOPENCORE_AMRNB
41
42 #include <opencore-amrnb/interf_dec.h>
43 #include <opencore-amrnb/interf_enc.h>
44
45 /* Common code for fixed and float version*/
46 typedef struct AMR_bitrates {
47 int rate;
48 enum Mode mode;
49 } AMR_bitrates;
50
51 /* Match desired bitrate */
52 static int get_bitrate_mode(int bitrate, void *log_ctx)
53 {
54 /* make the correspondance between bitrate and mode */
55 static const AMR_bitrates rates[] = {
56 { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
57 { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
58 };
59 int i, best = -1, min_diff = 0;
60 char log_buf[200];
61
62 for (i = 0; i < 8; i++) {
63 if (rates[i].rate == bitrate)
64 return rates[i].mode;
65 if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
66 best = i;
67 min_diff = abs(rates[i].rate - bitrate);
68 }
69 }
70 /* no bitrate matching exactly, log a warning */
71 snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
72 for (i = 0; i < 8; i++)
73 av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f);
74 av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f);
75 av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
76
77 return best;
78 }
79
80 typedef struct AMRContext {
81 AVClass *av_class;
82 int frame_count;
83 void *dec_state;
84 void *enc_state;
85 int enc_bitrate;
86 int enc_mode;
87 int enc_dtx;
88 } AMRContext;
89
90 static const AVOption options[] = {
91 { "dtx", "Allow DTX (generate comfort noise)", offsetof(AMRContext, enc_dtx), FF_OPT_TYPE_INT, { 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
92 { NULL }
93 };
94
95 static const AVClass class = {
96 "libopencore_amrnb", av_default_item_name, options, LIBAVUTIL_VERSION_INT
97 };
98
99 static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
100 {
101 AMRContext *s = avctx->priv_data;
102
103 s->frame_count = 0;
104 s->dec_state = Decoder_Interface_init();
105 if (!s->dec_state) {
106 av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n");
107 return -1;
108 }
109
110 amr_decode_fix_avctx(avctx);
111
112 if (avctx->channels > 1) {
113 av_log(avctx, AV_LOG_ERROR, "amr_nb: multichannel decoding not supported\n");
114 return AVERROR(ENOSYS);
115 }
116
117 return 0;
118 }
119
120 static av_cold int amr_nb_decode_close(AVCodecContext *avctx)
121 {
122 AMRContext *s = avctx->priv_data;
123
124 Decoder_Interface_exit(s->dec_state);
125 return 0;
126 }
127
128 static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
129 int *data_size, AVPacket *avpkt)
130 {
131 const uint8_t *buf = avpkt->data;
132 int buf_size = avpkt->size;
133 AMRContext *s = avctx->priv_data;
134 static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
135 enum Mode dec_mode;
136 int packet_size;
137
138 av_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n",
139 buf, buf_size, s->frame_count);
140
141 dec_mode = (buf[0] >> 3) & 0x000F;
142 packet_size = block_size[dec_mode] + 1;
143
144 if (packet_size > buf_size) {
145 av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
146 buf_size, packet_size);
147 return AVERROR_INVALIDDATA;
148 }
149
150 s->frame_count++;
151 av_dlog(avctx, "packet_size=%d buf= 0x%X %X %X %X\n",
152 packet_size, buf[0], buf[1], buf[2], buf[3]);
153 /* call decoder */
154 Decoder_Interface_Decode(s->dec_state, buf, data, 0);
155 *data_size = 160 * 2;
156
157 return packet_size;
158 }
159
160 AVCodec ff_libopencore_amrnb_decoder = {
161 .name = "libopencore_amrnb",
162 .type = AVMEDIA_TYPE_AUDIO,
163 .id = CODEC_ID_AMR_NB,
164 .priv_data_size = sizeof(AMRContext),
165 .init = amr_nb_decode_init,
166 .close = amr_nb_decode_close,
167 .decode = amr_nb_decode_frame,
168 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
169 };
170
171 static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
172 {
173 AMRContext *s = avctx->priv_data;
174
175 s->frame_count = 0;
176
177 if (avctx->sample_rate != 8000) {
178 av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
179 return AVERROR(ENOSYS);
180 }
181
182 if (avctx->channels != 1) {
183 av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
184 return AVERROR(ENOSYS);
185 }
186
187 avctx->frame_size = 160;
188 avctx->coded_frame = avcodec_alloc_frame();
189
190 s->enc_state = Encoder_Interface_init(s->enc_dtx);
191 if (!s->enc_state) {
192 av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
193 return -1;
194 }
195
196 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
197 s->enc_bitrate = avctx->bit_rate;
198
199 return 0;
200 }
201
202 static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
203 {
204 AMRContext *s = avctx->priv_data;
205
206 Encoder_Interface_exit(s->enc_state);
207 av_freep(&avctx->coded_frame);
208 return 0;
209 }
210
211 static int amr_nb_encode_frame(AVCodecContext *avctx,
212 unsigned char *frame/*out*/,
213 int buf_size, void *data/*in*/)
214 {
215 AMRContext *s = avctx->priv_data;
216 int written;
217
218 if (s->enc_bitrate != avctx->bit_rate) {
219 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
220 s->enc_bitrate = avctx->bit_rate;
221 }
222
223 written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, data,
224 frame, 0);
225 av_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
226 written, s->enc_mode, frame[0]);
227
228 return written;
229 }
230
231 AVCodec ff_libopencore_amrnb_encoder = {
232 .name = "libopencore_amrnb",
233 .type = AVMEDIA_TYPE_AUDIO,
234 .id = CODEC_ID_AMR_NB,
235 .priv_data_size = sizeof(AMRContext),
236 .init = amr_nb_encode_init,
237 .encode = amr_nb_encode_frame,
238 .close = amr_nb_encode_close,
239 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
240 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
241 .priv_class = &class,
242 };
243
244 #endif
245
246 /* -----------AMR wideband ------------*/
247 #if CONFIG_LIBOPENCORE_AMRWB
248
249 #include <opencore-amrwb/dec_if.h>
250 #include <opencore-amrwb/if_rom.h>
251
252 typedef struct AMRWBContext {
253 void *state;
254 } AMRWBContext;
255
256 static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
257 {
258 AMRWBContext *s = avctx->priv_data;
259
260 s->state = D_IF_init();
261
262 amr_decode_fix_avctx(avctx);
263
264 if (avctx->channels > 1) {
265 av_log(avctx, AV_LOG_ERROR, "amr_wb: multichannel decoding not supported\n");
266 return AVERROR(ENOSYS);
267 }
268
269 return 0;
270 }
271
272 static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
273 int *data_size, AVPacket *avpkt)
274 {
275 const uint8_t *buf = avpkt->data;
276 int buf_size = avpkt->size;
277 AMRWBContext *s = avctx->priv_data;
278 int mode;
279 int packet_size;
280 static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
281
282 if (!buf_size)
283 /* nothing to do */
284 return 0;
285
286 mode = (buf[0] >> 3) & 0x000F;
287 packet_size = block_size[mode];
288
289 if (packet_size > buf_size) {
290 av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
291 buf_size, packet_size + 1);
292 return AVERROR_INVALIDDATA;
293 }
294
295 D_IF_decode(s->state, buf, data, _good_frame);
296 *data_size = 320 * 2;
297 return packet_size;
298 }
299
300 static int amr_wb_decode_close(AVCodecContext *avctx)
301 {
302 AMRWBContext *s = avctx->priv_data;
303
304 D_IF_exit(s->state);
305 return 0;
306 }
307
308 AVCodec ff_libopencore_amrwb_decoder = {
309 .name = "libopencore_amrwb",
310 .type = AVMEDIA_TYPE_AUDIO,
311 .id = CODEC_ID_AMR_WB,
312 .priv_data_size = sizeof(AMRWBContext),
313 .init = amr_wb_decode_init,
314 .close = amr_wb_decode_close,
315 .decode = amr_wb_decode_frame,
316 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Wide-Band"),
317 };
318
319 #endif /* CONFIG_LIBOPENCORE_AMRWB */