2 * AMR Audio decoder stub
3 * Copyright (c) 2003 The FFmpeg project
5 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavutil/avstring.h"
25 #include "libavutil/channel_layout.h"
26 #include "libavutil/common.h"
27 #include "libavutil/opt.h"
29 #include "audio_frame_queue.h"
32 #if CONFIG_LIBOPENCORE_AMRNB_DECODER || CONFIG_LIBOPENCORE_AMRWB_DECODER
33 static int amr_decode_fix_avctx(AVCodecContext *avctx)
35 const int is_amr_wb = 1 + (avctx->codec_id == AV_CODEC_ID_AMR_WB);
37 if (!avctx->sample_rate)
38 avctx->sample_rate = 8000 * is_amr_wb;
40 if (avctx->channels > 1) {
41 avpriv_report_missing_feature(avctx, "multi-channel AMR");
42 return AVERROR_PATCHWELCOME;
46 avctx->channel_layout = AV_CH_LAYOUT_MONO;
47 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
52 #if CONFIG_LIBOPENCORE_AMRNB
54 #include <opencore-amrnb/interf_dec.h>
55 #include <opencore-amrnb/interf_enc.h>
57 typedef struct AMRContext {
68 #if CONFIG_LIBOPENCORE_AMRNB_DECODER
69 static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
71 AMRContext *s = avctx->priv_data;
74 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
77 s->dec_state = Decoder_Interface_init();
79 av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n");
86 static av_cold int amr_nb_decode_close(AVCodecContext *avctx)
88 AMRContext *s = avctx->priv_data;
90 Decoder_Interface_exit(s->dec_state);
95 static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
96 int *got_frame_ptr, AVPacket *avpkt)
98 AVFrame *frame = data;
99 const uint8_t *buf = avpkt->data;
100 int buf_size = avpkt->size;
101 AMRContext *s = avctx->priv_data;
102 static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
104 int packet_size, ret;
106 ff_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n",
107 buf, buf_size, avctx->frame_number);
109 /* get output buffer */
110 frame->nb_samples = 160;
111 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
114 dec_mode = (buf[0] >> 3) & 0x000F;
115 packet_size = block_size[dec_mode] + 1;
117 if (packet_size > buf_size) {
118 av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
119 buf_size, packet_size);
120 return AVERROR_INVALIDDATA;
123 ff_dlog(avctx, "packet_size=%d buf= 0x%"PRIx8" %"PRIx8" %"PRIx8" %"PRIx8"\n",
124 packet_size, buf[0], buf[1], buf[2], buf[3]);
126 Decoder_Interface_Decode(s->dec_state, buf, (short *)frame->data[0], 0);
133 AVCodec ff_libopencore_amrnb_decoder = {
134 .name = "libopencore_amrnb",
135 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
136 .type = AVMEDIA_TYPE_AUDIO,
137 .id = AV_CODEC_ID_AMR_NB,
138 .priv_data_size = sizeof(AMRContext),
139 .init = amr_nb_decode_init,
140 .close = amr_nb_decode_close,
141 .decode = amr_nb_decode_frame,
142 .capabilities = AV_CODEC_CAP_DR1,
144 #endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */
146 #if CONFIG_LIBOPENCORE_AMRNB_ENCODER
147 /* Common code for fixed and float version*/
148 typedef struct AMR_bitrates {
153 /* Match desired bitrate */
154 static int get_bitrate_mode(int bitrate, void *log_ctx)
156 /* make the correspondence between bitrate and mode */
157 static const AMR_bitrates rates[] = {
158 { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
159 { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
161 int i, best = -1, min_diff = 0;
164 for (i = 0; i < 8; i++) {
165 if (rates[i].rate == bitrate)
166 return rates[i].mode;
167 if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
169 min_diff = abs(rates[i].rate - bitrate);
172 /* no bitrate matching exactly, log a warning */
173 snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
174 for (i = 0; i < 8; i++)
175 av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f);
176 av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f);
177 av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
182 static const AVOption options[] = {
183 { "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 },
187 static const AVClass amrnb_class = {
188 .class_name = "libopencore_amrnb",
189 .item_name = av_default_item_name,
191 .version = LIBAVUTIL_VERSION_INT,
194 static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
196 AMRContext *s = avctx->priv_data;
198 if (avctx->sample_rate != 8000 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
199 av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
200 return AVERROR(ENOSYS);
203 if (avctx->channels != 1) {
204 av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
205 return AVERROR(ENOSYS);
208 avctx->frame_size = 160;
209 avctx->initial_padding = 50;
210 ff_af_queue_init(avctx, &s->afq);
212 s->enc_state = Encoder_Interface_init(s->enc_dtx);
214 av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
218 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
219 s->enc_bitrate = avctx->bit_rate;
224 static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
226 AMRContext *s = avctx->priv_data;
228 Encoder_Interface_exit(s->enc_state);
229 ff_af_queue_close(&s->afq);
233 static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
234 const AVFrame *frame, int *got_packet_ptr)
236 AMRContext *s = avctx->priv_data;
238 int16_t *flush_buf = NULL;
239 const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL;
241 if (s->enc_bitrate != avctx->bit_rate) {
242 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
243 s->enc_bitrate = avctx->bit_rate;
246 if ((ret = ff_alloc_packet2(avctx, avpkt, 32, 0)) < 0)
250 if (frame->nb_samples < avctx->frame_size) {
251 flush_buf = av_mallocz_array(avctx->frame_size, sizeof(*flush_buf));
253 return AVERROR(ENOMEM);
254 memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf));
256 if (frame->nb_samples < avctx->frame_size - avctx->initial_padding)
257 s->enc_last_frame = -1;
259 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) {
260 av_freep(&flush_buf);
264 if (s->enc_last_frame < 0)
266 flush_buf = av_mallocz_array(avctx->frame_size, sizeof(*flush_buf));
268 return AVERROR(ENOMEM);
270 s->enc_last_frame = -1;
273 written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples,
275 ff_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
276 written, s->enc_mode, avpkt->data[0]);
278 /* Get the next frame pts/duration */
279 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
282 avpkt->size = written;
284 av_freep(&flush_buf);
288 AVCodec ff_libopencore_amrnb_encoder = {
289 .name = "libopencore_amrnb",
290 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
291 .type = AVMEDIA_TYPE_AUDIO,
292 .id = AV_CODEC_ID_AMR_NB,
293 .priv_data_size = sizeof(AMRContext),
294 .init = amr_nb_encode_init,
295 .encode2 = amr_nb_encode_frame,
296 .close = amr_nb_encode_close,
297 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SMALL_LAST_FRAME,
298 .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
299 AV_SAMPLE_FMT_NONE },
300 .priv_class = &amrnb_class,
302 #endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */
304 #endif /* CONFIG_LIBOPENCORE_AMRNB */
306 /* -----------AMR wideband ------------*/
307 #if CONFIG_LIBOPENCORE_AMRWB_DECODER
309 #include <opencore-amrwb/dec_if.h>
310 #include <opencore-amrwb/if_rom.h>
312 typedef struct AMRWBContext {
316 static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
318 AMRWBContext *s = avctx->priv_data;
321 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
324 s->state = D_IF_init();
329 static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
330 int *got_frame_ptr, AVPacket *avpkt)
332 AVFrame *frame = data;
333 const uint8_t *buf = avpkt->data;
334 int buf_size = avpkt->size;
335 AMRWBContext *s = avctx->priv_data;
338 static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
340 /* get output buffer */
341 frame->nb_samples = 320;
342 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
345 mode = (buf[0] >> 3) & 0x000F;
346 packet_size = block_size[mode];
348 if (packet_size > buf_size) {
349 av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
350 buf_size, packet_size + 1);
351 return AVERROR_INVALIDDATA;
354 av_log(avctx, AV_LOG_ERROR, "amr packet_size invalid\n");
355 return AVERROR_INVALIDDATA;
358 D_IF_decode(s->state, buf, (short *)frame->data[0], _good_frame);
365 static int amr_wb_decode_close(AVCodecContext *avctx)
367 AMRWBContext *s = avctx->priv_data;
373 AVCodec ff_libopencore_amrwb_decoder = {
374 .name = "libopencore_amrwb",
375 .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"),
376 .type = AVMEDIA_TYPE_AUDIO,
377 .id = AV_CODEC_ID_AMR_WB,
378 .priv_data_size = sizeof(AMRWBContext),
379 .init = amr_wb_decode_init,
380 .close = amr_wb_decode_close,
381 .decode = amr_wb_decode_frame,
382 .capabilities = AV_CODEC_CAP_DR1,
383 .wrapper_name = "libopencore_amrwb",
386 #endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */