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
22 #include "config_components.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/common.h"
29 #include "libavutil/opt.h"
31 #include "audio_frame_queue.h"
32 #include "codec_internal.h"
36 #if CONFIG_LIBOPENCORE_AMRNB_DECODER || CONFIG_LIBOPENCORE_AMRWB_DECODER
37 static int amr_decode_fix_avctx(AVCodecContext *avctx)
39 const int is_amr_wb = 1 + (avctx->codec_id == AV_CODEC_ID_AMR_WB);
41 if (!avctx->sample_rate)
42 avctx->sample_rate = 8000 * is_amr_wb;
44 if (avctx->ch_layout.nb_channels > 1) {
45 avpriv_report_missing_feature(avctx, "multi-channel AMR");
46 return AVERROR_PATCHWELCOME;
49 av_channel_layout_uninit(&avctx->ch_layout);
50 avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
51 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
56 #if CONFIG_LIBOPENCORE_AMRNB
58 #include <opencore-amrnb/interf_dec.h>
59 #include <opencore-amrnb/interf_enc.h>
61 typedef struct AMRContext {
72 #if CONFIG_LIBOPENCORE_AMRNB_DECODER
73 static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
75 AMRContext *s = avctx->priv_data;
78 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
81 s->dec_state = Decoder_Interface_init();
83 av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n");
90 static av_cold int amr_nb_decode_close(AVCodecContext *avctx)
92 AMRContext *s = avctx->priv_data;
94 Decoder_Interface_exit(s->dec_state);
99 static int amr_nb_decode_frame(AVCodecContext *avctx, AVFrame *frame,
100 int *got_frame_ptr, AVPacket *avpkt)
102 const uint8_t *buf = avpkt->data;
103 int buf_size = avpkt->size;
104 AMRContext *s = avctx->priv_data;
105 static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
107 int packet_size, ret;
109 ff_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%"PRId64"!!\n",
110 buf, buf_size, avctx->frame_num);
112 /* get output buffer */
113 frame->nb_samples = 160;
114 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
117 dec_mode = (buf[0] >> 3) & 0x000F;
118 packet_size = block_size[dec_mode] + 1;
120 if (packet_size > buf_size) {
121 av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
122 buf_size, packet_size);
123 return AVERROR_INVALIDDATA;
126 ff_dlog(avctx, "packet_size=%d buf= 0x%"PRIx8" %"PRIx8" %"PRIx8" %"PRIx8"\n",
127 packet_size, buf[0], buf[1], buf[2], buf[3]);
129 Decoder_Interface_Decode(s->dec_state, buf, (short *)frame->data[0], 0);
136 const FFCodec ff_libopencore_amrnb_decoder = {
137 .p.name = "libopencore_amrnb",
138 CODEC_LONG_NAME("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
139 .p.type = AVMEDIA_TYPE_AUDIO,
140 .p.id = AV_CODEC_ID_AMR_NB,
141 .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
142 .priv_data_size = sizeof(AMRContext),
143 .init = amr_nb_decode_init,
144 .close = amr_nb_decode_close,
145 FF_CODEC_DECODE_CB(amr_nb_decode_frame),
146 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
148 #endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */
150 #if CONFIG_LIBOPENCORE_AMRNB_ENCODER
151 /* Common code for fixed and float version*/
152 typedef struct AMR_bitrates {
157 /* Match desired bitrate */
158 static int get_bitrate_mode(int bitrate, void *log_ctx)
160 /* make the correspondence between bitrate and mode */
161 static const AMR_bitrates rates[] = {
162 { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
163 { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
165 int i, best = -1, min_diff = 0;
168 for (i = 0; i < 8; i++) {
169 if (rates[i].rate == bitrate)
170 return rates[i].mode;
171 if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
173 min_diff = abs(rates[i].rate - bitrate);
176 /* no bitrate matching exactly, log a warning */
177 snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
178 for (i = 0; i < 8; i++)
179 av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f);
180 av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f);
181 av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
186 static const AVOption options[] = {
187 { "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 },
191 static const AVClass amrnb_class = {
192 .class_name = "libopencore_amrnb",
193 .item_name = av_default_item_name,
195 .version = LIBAVUTIL_VERSION_INT,
198 static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
200 AMRContext *s = avctx->priv_data;
202 if (avctx->sample_rate != 8000 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
203 av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
204 return AVERROR(ENOSYS);
207 if (avctx->ch_layout.nb_channels != 1) {
208 av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
209 return AVERROR(ENOSYS);
212 avctx->frame_size = 160;
213 avctx->initial_padding = 50;
214 ff_af_queue_init(avctx, &s->afq);
216 s->enc_state = Encoder_Interface_init(s->enc_dtx);
218 av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
222 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
223 s->enc_bitrate = avctx->bit_rate;
228 static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
230 AMRContext *s = avctx->priv_data;
232 Encoder_Interface_exit(s->enc_state);
233 ff_af_queue_close(&s->afq);
237 static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
238 const AVFrame *frame, int *got_packet_ptr)
240 AMRContext *s = avctx->priv_data;
242 int16_t *flush_buf = NULL;
243 const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL;
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;
250 if ((ret = ff_alloc_packet(avctx, avpkt, 32)) < 0)
254 if (frame->nb_samples < avctx->frame_size) {
255 flush_buf = av_calloc(avctx->frame_size, sizeof(*flush_buf));
257 return AVERROR(ENOMEM);
258 memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf));
260 if (frame->nb_samples < avctx->frame_size - avctx->initial_padding)
261 s->enc_last_frame = -1;
263 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) {
264 av_freep(&flush_buf);
268 if (s->enc_last_frame < 0)
270 flush_buf = av_calloc(avctx->frame_size, sizeof(*flush_buf));
272 return AVERROR(ENOMEM);
274 s->enc_last_frame = -1;
277 written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples,
279 ff_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
280 written, s->enc_mode, avpkt->data[0]);
282 /* Get the next frame pts/duration */
283 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
286 avpkt->size = written;
288 av_freep(&flush_buf);
292 const FFCodec ff_libopencore_amrnb_encoder = {
293 .p.name = "libopencore_amrnb",
294 CODEC_LONG_NAME("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
295 .p.type = AVMEDIA_TYPE_AUDIO,
296 .p.id = AV_CODEC_ID_AMR_NB,
297 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
298 AV_CODEC_CAP_SMALL_LAST_FRAME,
299 .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
300 .priv_data_size = sizeof(AMRContext),
301 .init = amr_nb_encode_init,
302 FF_CODEC_ENCODE_CB(amr_nb_encode_frame),
303 .close = amr_nb_encode_close,
304 .p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
305 AV_SAMPLE_FMT_NONE },
306 .p.priv_class = &amrnb_class,
308 #endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */
310 #endif /* CONFIG_LIBOPENCORE_AMRNB */
312 /* -----------AMR wideband ------------*/
313 #if CONFIG_LIBOPENCORE_AMRWB_DECODER
315 #include <opencore-amrwb/dec_if.h>
316 #include <opencore-amrwb/if_rom.h>
318 typedef struct AMRWBContext {
322 static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
324 AMRWBContext *s = avctx->priv_data;
327 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
330 s->state = D_IF_init();
335 static int amr_wb_decode_frame(AVCodecContext *avctx, AVFrame *frame,
336 int *got_frame_ptr, AVPacket *avpkt)
338 const uint8_t *buf = avpkt->data;
339 int buf_size = avpkt->size;
340 AMRWBContext *s = avctx->priv_data;
343 static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
345 /* get output buffer */
346 frame->nb_samples = 320;
347 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
350 mode = (buf[0] >> 3) & 0x000F;
351 packet_size = block_size[mode];
353 if (packet_size > buf_size) {
354 av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
355 buf_size, packet_size + 1);
356 return AVERROR_INVALIDDATA;
359 av_log(avctx, AV_LOG_ERROR, "amr packet_size invalid\n");
360 return AVERROR_INVALIDDATA;
363 D_IF_decode(s->state, buf, (short *)frame->data[0], _good_frame);
370 static int amr_wb_decode_close(AVCodecContext *avctx)
372 AMRWBContext *s = avctx->priv_data;
378 const FFCodec ff_libopencore_amrwb_decoder = {
379 .p.name = "libopencore_amrwb",
380 CODEC_LONG_NAME("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"),
381 .p.type = AVMEDIA_TYPE_AUDIO,
382 .p.id = AV_CODEC_ID_AMR_WB,
383 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
384 .p.wrapper_name = "libopencore_amrwb",
385 .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
386 .priv_data_size = sizeof(AMRWBContext),
387 .init = amr_wb_decode_init,
388 .close = amr_wb_decode_close,
389 FF_CODEC_DECODE_CB(amr_wb_decode_frame),
392 #endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */