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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 "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 | if (!avctx->sample_rate) | |
35 | avctx->sample_rate = 8000 * is_amr_wb; | |
36 | ||
37 | if (avctx->channels > 1) { | |
38 | avpriv_report_missing_feature(avctx, "multi-channel AMR"); | |
39 | return AVERROR_PATCHWELCOME; | |
40 | } | |
41 | ||
42 | avctx->channels = 1; | |
43 | avctx->channel_layout = AV_CH_LAYOUT_MONO; | |
44 | avctx->sample_fmt = AV_SAMPLE_FMT_S16; | |
45 | return 0; | |
46 | } | |
47 | ||
48 | #if CONFIG_LIBOPENCORE_AMRNB | |
49 | ||
50 | #include <opencore-amrnb/interf_dec.h> | |
51 | #include <opencore-amrnb/interf_enc.h> | |
52 | ||
53 | typedef struct AMRContext { | |
54 | AVClass *av_class; | |
55 | void *dec_state; | |
56 | void *enc_state; | |
57 | int enc_bitrate; | |
58 | int enc_mode; | |
59 | int enc_dtx; | |
60 | int enc_last_frame; | |
61 | AudioFrameQueue afq; | |
62 | } AMRContext; | |
63 | ||
64 | #if CONFIG_LIBOPENCORE_AMRNB_DECODER | |
65 | static av_cold int amr_nb_decode_init(AVCodecContext *avctx) | |
66 | { | |
67 | AMRContext *s = avctx->priv_data; | |
68 | int ret; | |
69 | ||
70 | if ((ret = amr_decode_fix_avctx(avctx)) < 0) | |
71 | return ret; | |
72 | ||
73 | s->dec_state = Decoder_Interface_init(); | |
74 | if (!s->dec_state) { | |
75 | av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n"); | |
76 | return -1; | |
77 | } | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static av_cold int amr_nb_decode_close(AVCodecContext *avctx) | |
83 | { | |
84 | AMRContext *s = avctx->priv_data; | |
85 | ||
86 | Decoder_Interface_exit(s->dec_state); | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int amr_nb_decode_frame(AVCodecContext *avctx, void *data, | |
92 | int *got_frame_ptr, AVPacket *avpkt) | |
93 | { | |
94 | AVFrame *frame = data; | |
95 | const uint8_t *buf = avpkt->data; | |
96 | int buf_size = avpkt->size; | |
97 | AMRContext *s = avctx->priv_data; | |
98 | static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 }; | |
99 | enum Mode dec_mode; | |
100 | int packet_size, ret; | |
101 | ||
102 | av_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n", | |
103 | buf, buf_size, avctx->frame_number); | |
104 | ||
105 | /* get output buffer */ | |
106 | frame->nb_samples = 160; | |
107 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) | |
108 | return ret; | |
109 | ||
110 | dec_mode = (buf[0] >> 3) & 0x000F; | |
111 | packet_size = block_size[dec_mode] + 1; | |
112 | ||
113 | if (packet_size > buf_size) { | |
114 | av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", | |
115 | buf_size, packet_size); | |
116 | return AVERROR_INVALIDDATA; | |
117 | } | |
118 | ||
119 | av_dlog(avctx, "packet_size=%d buf= 0x%X %X %X %X\n", | |
120 | packet_size, buf[0], buf[1], buf[2], buf[3]); | |
121 | /* call decoder */ | |
122 | Decoder_Interface_Decode(s->dec_state, buf, (short *)frame->data[0], 0); | |
123 | ||
124 | *got_frame_ptr = 1; | |
125 | ||
126 | return packet_size; | |
127 | } | |
128 | ||
129 | AVCodec ff_libopencore_amrnb_decoder = { | |
130 | .name = "libopencore_amrnb", | |
131 | .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"), | |
132 | .type = AVMEDIA_TYPE_AUDIO, | |
133 | .id = AV_CODEC_ID_AMR_NB, | |
134 | .priv_data_size = sizeof(AMRContext), | |
135 | .init = amr_nb_decode_init, | |
136 | .close = amr_nb_decode_close, | |
137 | .decode = amr_nb_decode_frame, | |
138 | .capabilities = CODEC_CAP_DR1, | |
139 | }; | |
140 | #endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */ | |
141 | ||
142 | #if CONFIG_LIBOPENCORE_AMRNB_ENCODER | |
143 | /* Common code for fixed and float version*/ | |
144 | typedef struct AMR_bitrates { | |
145 | int rate; | |
146 | enum Mode mode; | |
147 | } AMR_bitrates; | |
148 | ||
149 | /* Match desired bitrate */ | |
150 | static int get_bitrate_mode(int bitrate, void *log_ctx) | |
151 | { | |
152 | /* make the correspondance between bitrate and mode */ | |
153 | static const AMR_bitrates rates[] = { | |
154 | { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 }, | |
155 | { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 } | |
156 | }; | |
157 | int i, best = -1, min_diff = 0; | |
158 | char log_buf[200]; | |
159 | ||
160 | for (i = 0; i < 8; i++) { | |
161 | if (rates[i].rate == bitrate) | |
162 | return rates[i].mode; | |
163 | if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) { | |
164 | best = i; | |
165 | min_diff = abs(rates[i].rate - bitrate); | |
166 | } | |
167 | } | |
168 | /* no bitrate matching exactly, log a warning */ | |
169 | snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of "); | |
170 | for (i = 0; i < 8; i++) | |
171 | av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f); | |
172 | av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f); | |
173 | av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf); | |
174 | ||
175 | return best; | |
176 | } | |
177 | ||
178 | static const AVOption options[] = { | |
179 | { "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 }, | |
180 | { NULL } | |
181 | }; | |
182 | ||
183 | static const AVClass amrnb_class = { | |
184 | "libopencore_amrnb", av_default_item_name, options, LIBAVUTIL_VERSION_INT | |
185 | }; | |
186 | ||
187 | static av_cold int amr_nb_encode_init(AVCodecContext *avctx) | |
188 | { | |
189 | AMRContext *s = avctx->priv_data; | |
190 | ||
191 | if (avctx->sample_rate != 8000 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) { | |
192 | av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n"); | |
193 | return AVERROR(ENOSYS); | |
194 | } | |
195 | ||
196 | if (avctx->channels != 1) { | |
197 | av_log(avctx, AV_LOG_ERROR, "Only mono supported\n"); | |
198 | return AVERROR(ENOSYS); | |
199 | } | |
200 | ||
201 | avctx->frame_size = 160; | |
f6fa7814 | 202 | avctx->initial_padding = 50; |
2ba45a60 DM |
203 | ff_af_queue_init(avctx, &s->afq); |
204 | ||
205 | s->enc_state = Encoder_Interface_init(s->enc_dtx); | |
206 | if (!s->enc_state) { | |
207 | av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n"); | |
208 | return -1; | |
209 | } | |
210 | ||
211 | s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx); | |
212 | s->enc_bitrate = avctx->bit_rate; | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | static av_cold int amr_nb_encode_close(AVCodecContext *avctx) | |
218 | { | |
219 | AMRContext *s = avctx->priv_data; | |
220 | ||
221 | Encoder_Interface_exit(s->enc_state); | |
222 | ff_af_queue_close(&s->afq); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, | |
227 | const AVFrame *frame, int *got_packet_ptr) | |
228 | { | |
229 | AMRContext *s = avctx->priv_data; | |
230 | int written, ret; | |
231 | int16_t *flush_buf = NULL; | |
232 | const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL; | |
233 | ||
234 | if (s->enc_bitrate != avctx->bit_rate) { | |
235 | s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx); | |
236 | s->enc_bitrate = avctx->bit_rate; | |
237 | } | |
238 | ||
239 | if ((ret = ff_alloc_packet2(avctx, avpkt, 32)) < 0) | |
240 | return ret; | |
241 | ||
242 | if (frame) { | |
243 | if (frame->nb_samples < avctx->frame_size) { | |
244 | flush_buf = av_mallocz_array(avctx->frame_size, sizeof(*flush_buf)); | |
245 | if (!flush_buf) | |
246 | return AVERROR(ENOMEM); | |
247 | memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf)); | |
248 | samples = flush_buf; | |
f6fa7814 | 249 | if (frame->nb_samples < avctx->frame_size - avctx->initial_padding) |
2ba45a60 DM |
250 | s->enc_last_frame = -1; |
251 | } | |
252 | if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) { | |
253 | av_freep(&flush_buf); | |
254 | return ret; | |
255 | } | |
256 | } else { | |
257 | if (s->enc_last_frame < 0) | |
258 | return 0; | |
259 | flush_buf = av_mallocz_array(avctx->frame_size, sizeof(*flush_buf)); | |
260 | if (!flush_buf) | |
261 | return AVERROR(ENOMEM); | |
262 | samples = flush_buf; | |
263 | s->enc_last_frame = -1; | |
264 | } | |
265 | ||
266 | written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples, | |
267 | avpkt->data, 0); | |
268 | av_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n", | |
269 | written, s->enc_mode, avpkt->data[0]); | |
270 | ||
271 | /* Get the next frame pts/duration */ | |
272 | ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts, | |
273 | &avpkt->duration); | |
274 | ||
275 | avpkt->size = written; | |
276 | *got_packet_ptr = 1; | |
277 | av_freep(&flush_buf); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | AVCodec ff_libopencore_amrnb_encoder = { | |
282 | .name = "libopencore_amrnb", | |
283 | .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"), | |
284 | .type = AVMEDIA_TYPE_AUDIO, | |
285 | .id = AV_CODEC_ID_AMR_NB, | |
286 | .priv_data_size = sizeof(AMRContext), | |
287 | .init = amr_nb_encode_init, | |
288 | .encode2 = amr_nb_encode_frame, | |
289 | .close = amr_nb_encode_close, | |
290 | .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME, | |
291 | .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16, | |
292 | AV_SAMPLE_FMT_NONE }, | |
293 | .priv_class = &amrnb_class, | |
294 | }; | |
295 | #endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */ | |
296 | ||
297 | #endif /* CONFIG_LIBOPENCORE_AMRNB */ | |
298 | ||
299 | /* -----------AMR wideband ------------*/ | |
300 | #if CONFIG_LIBOPENCORE_AMRWB_DECODER | |
301 | ||
302 | #include <opencore-amrwb/dec_if.h> | |
303 | #include <opencore-amrwb/if_rom.h> | |
304 | ||
305 | typedef struct AMRWBContext { | |
306 | void *state; | |
307 | } AMRWBContext; | |
308 | ||
309 | static av_cold int amr_wb_decode_init(AVCodecContext *avctx) | |
310 | { | |
311 | AMRWBContext *s = avctx->priv_data; | |
312 | int ret; | |
313 | ||
314 | if ((ret = amr_decode_fix_avctx(avctx)) < 0) | |
315 | return ret; | |
316 | ||
317 | s->state = D_IF_init(); | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static int amr_wb_decode_frame(AVCodecContext *avctx, void *data, | |
323 | int *got_frame_ptr, AVPacket *avpkt) | |
324 | { | |
325 | AVFrame *frame = data; | |
326 | const uint8_t *buf = avpkt->data; | |
327 | int buf_size = avpkt->size; | |
328 | AMRWBContext *s = avctx->priv_data; | |
329 | int mode, ret; | |
330 | int packet_size; | |
331 | static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1}; | |
332 | ||
333 | /* get output buffer */ | |
334 | frame->nb_samples = 320; | |
335 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) | |
336 | return ret; | |
337 | ||
338 | mode = (buf[0] >> 3) & 0x000F; | |
339 | packet_size = block_size[mode]; | |
340 | ||
341 | if (packet_size > buf_size) { | |
342 | av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", | |
343 | buf_size, packet_size + 1); | |
344 | return AVERROR_INVALIDDATA; | |
345 | } | |
346 | if (!packet_size) { | |
347 | av_log(avctx, AV_LOG_ERROR, "amr packet_size invalid\n"); | |
348 | return AVERROR_INVALIDDATA; | |
349 | } | |
350 | ||
351 | D_IF_decode(s->state, buf, (short *)frame->data[0], _good_frame); | |
352 | ||
353 | *got_frame_ptr = 1; | |
354 | ||
355 | return packet_size; | |
356 | } | |
357 | ||
358 | static int amr_wb_decode_close(AVCodecContext *avctx) | |
359 | { | |
360 | AMRWBContext *s = avctx->priv_data; | |
361 | ||
362 | D_IF_exit(s->state); | |
363 | return 0; | |
364 | } | |
365 | ||
366 | AVCodec ff_libopencore_amrwb_decoder = { | |
367 | .name = "libopencore_amrwb", | |
368 | .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"), | |
369 | .type = AVMEDIA_TYPE_AUDIO, | |
370 | .id = AV_CODEC_ID_AMR_WB, | |
371 | .priv_data_size = sizeof(AMRWBContext), | |
372 | .init = amr_wb_decode_init, | |
373 | .close = amr_wb_decode_close, | |
374 | .decode = amr_wb_decode_frame, | |
375 | .capabilities = CODEC_CAP_DR1, | |
376 | }; | |
377 | ||
378 | #endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */ |