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=%d!!\n",
110 buf, buf_size, avctx->frame_number);
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 .p.long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
139 .p.type = AVMEDIA_TYPE_AUDIO,
140 .p.id = AV_CODEC_ID_AMR_NB,
141 .priv_data_size = sizeof(AMRContext),
142 .init = amr_nb_decode_init,
143 .close = amr_nb_decode_close,
144 FF_CODEC_DECODE_CB(amr_nb_decode_frame),
145 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
147 #endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */
149 #if CONFIG_LIBOPENCORE_AMRNB_ENCODER
150 /* Common code for fixed and float version*/
151 typedef struct AMR_bitrates {
156 /* Match desired bitrate */
157 static int get_bitrate_mode(int bitrate, void *log_ctx)
159 /* make the correspondence between bitrate and mode */
160 static const AMR_bitrates rates[] = {
161 { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
162 { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
164 int i, best = -1, min_diff = 0;
167 for (i = 0; i < 8; i++) {
168 if (rates[i].rate == bitrate)
169 return rates[i].mode;
170 if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
172 min_diff = abs(rates[i].rate - bitrate);
175 /* no bitrate matching exactly, log a warning */
176 snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
177 for (i = 0; i < 8; i++)
178 av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f);
179 av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f);
180 av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
185 static const AVOption options[] = {
186 { "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 },
190 static const AVClass amrnb_class = {
191 .class_name = "libopencore_amrnb",
192 .item_name = av_default_item_name,
194 .version = LIBAVUTIL_VERSION_INT,
197 static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
199 AMRContext *s = avctx->priv_data;
201 if (avctx->sample_rate != 8000 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
202 av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
203 return AVERROR(ENOSYS);
206 if (avctx->ch_layout.nb_channels != 1) {
207 av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
208 return AVERROR(ENOSYS);
211 avctx->frame_size = 160;
212 avctx->initial_padding = 50;
213 ff_af_queue_init(avctx, &s->afq);
215 s->enc_state = Encoder_Interface_init(s->enc_dtx);
217 av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
221 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
222 s->enc_bitrate = avctx->bit_rate;
227 static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
229 AMRContext *s = avctx->priv_data;
231 Encoder_Interface_exit(s->enc_state);
232 ff_af_queue_close(&s->afq);
236 static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
237 const AVFrame *frame, int *got_packet_ptr)
239 AMRContext *s = avctx->priv_data;
241 int16_t *flush_buf = NULL;
242 const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL;
244 if (s->enc_bitrate != avctx->bit_rate) {
245 s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
246 s->enc_bitrate = avctx->bit_rate;
249 if ((ret = ff_alloc_packet(avctx, avpkt, 32)) < 0)
253 if (frame->nb_samples < avctx->frame_size) {
254 flush_buf = av_calloc(avctx->frame_size, sizeof(*flush_buf));
256 return AVERROR(ENOMEM);
257 memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf));
259 if (frame->nb_samples < avctx->frame_size - avctx->initial_padding)
260 s->enc_last_frame = -1;
262 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) {
263 av_freep(&flush_buf);
267 if (s->enc_last_frame < 0)
269 flush_buf = av_calloc(avctx->frame_size, sizeof(*flush_buf));
271 return AVERROR(ENOMEM);
273 s->enc_last_frame = -1;
276 written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples,
278 ff_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
279 written, s->enc_mode, avpkt->data[0]);
281 /* Get the next frame pts/duration */
282 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
285 avpkt->size = written;
287 av_freep(&flush_buf);
291 const FFCodec ff_libopencore_amrnb_encoder = {
292 .p.name = "libopencore_amrnb",
293 .p.long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
294 .p.type = AVMEDIA_TYPE_AUDIO,
295 .p.id = AV_CODEC_ID_AMR_NB,
296 .priv_data_size = sizeof(AMRContext),
297 .init = amr_nb_encode_init,
298 FF_CODEC_ENCODE_CB(amr_nb_encode_frame),
299 .close = amr_nb_encode_close,
300 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SMALL_LAST_FRAME,
301 .p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
302 AV_SAMPLE_FMT_NONE },
303 .p.priv_class = &amrnb_class,
305 #endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */
307 #endif /* CONFIG_LIBOPENCORE_AMRNB */
309 /* -----------AMR wideband ------------*/
310 #if CONFIG_LIBOPENCORE_AMRWB_DECODER
312 #include <opencore-amrwb/dec_if.h>
313 #include <opencore-amrwb/if_rom.h>
315 typedef struct AMRWBContext {
319 static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
321 AMRWBContext *s = avctx->priv_data;
324 if ((ret = amr_decode_fix_avctx(avctx)) < 0)
327 s->state = D_IF_init();
332 static int amr_wb_decode_frame(AVCodecContext *avctx, AVFrame *frame,
333 int *got_frame_ptr, AVPacket *avpkt)
335 const uint8_t *buf = avpkt->data;
336 int buf_size = avpkt->size;
337 AMRWBContext *s = avctx->priv_data;
340 static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
342 /* get output buffer */
343 frame->nb_samples = 320;
344 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
347 mode = (buf[0] >> 3) & 0x000F;
348 packet_size = block_size[mode];
350 if (packet_size > buf_size) {
351 av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
352 buf_size, packet_size + 1);
353 return AVERROR_INVALIDDATA;
356 av_log(avctx, AV_LOG_ERROR, "amr packet_size invalid\n");
357 return AVERROR_INVALIDDATA;
360 D_IF_decode(s->state, buf, (short *)frame->data[0], _good_frame);
367 static int amr_wb_decode_close(AVCodecContext *avctx)
369 AMRWBContext *s = avctx->priv_data;
375 const FFCodec ff_libopencore_amrwb_decoder = {
376 .p.name = "libopencore_amrwb",
377 .p.long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"),
378 .p.type = AVMEDIA_TYPE_AUDIO,
379 .p.id = AV_CODEC_ID_AMR_WB,
380 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
381 .p.wrapper_name = "libopencore_amrwb",
382 .priv_data_size = sizeof(AMRWBContext),
383 .init = amr_wb_decode_init,
384 .close = amr_wb_decode_close,
385 FF_CODEC_DECODE_CB(amr_wb_decode_frame),
388 #endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */