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 "libavutil/avstring.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavutil/opt.h"
27 #include "audio_frame_queue.h"
30 static int amr_decode_fix_avctx(AVCodecContext
*avctx
)
32 const int is_amr_wb
= 1 + (avctx
->codec_id
== AV_CODEC_ID_AMR_WB
);
34 if (!avctx
->sample_rate
)
35 avctx
->sample_rate
= 8000 * is_amr_wb
;
37 if (avctx
->channels
> 1) {
38 avpriv_report_missing_feature(avctx
, "multi-channel AMR");
39 return AVERROR_PATCHWELCOME
;
43 avctx
->channel_layout
= AV_CH_LAYOUT_MONO
;
44 avctx
->sample_fmt
= AV_SAMPLE_FMT_S16
;
48 #if CONFIG_LIBOPENCORE_AMRNB
50 #include <opencore-amrnb/interf_dec.h>
51 #include <opencore-amrnb/interf_enc.h>
53 typedef struct AMRContext
{
64 #if CONFIG_LIBOPENCORE_AMRNB_DECODER
65 static av_cold
int amr_nb_decode_init(AVCodecContext
*avctx
)
67 AMRContext
*s
= avctx
->priv_data
;
70 if ((ret
= amr_decode_fix_avctx(avctx
)) < 0)
73 s
->dec_state
= Decoder_Interface_init();
75 av_log(avctx
, AV_LOG_ERROR
, "Decoder_Interface_init error\n");
82 static av_cold
int amr_nb_decode_close(AVCodecContext
*avctx
)
84 AMRContext
*s
= avctx
->priv_data
;
86 Decoder_Interface_exit(s
->dec_state
);
91 static int amr_nb_decode_frame(AVCodecContext
*avctx
, void *data
,
92 int *got_frame_ptr
, AVPacket
*avpkt
)
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 };
100 int packet_size
, ret
;
102 av_dlog(avctx
, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n",
103 buf
, buf_size
, avctx
->frame_number
);
105 /* get output buffer */
106 frame
->nb_samples
= 160;
107 if ((ret
= ff_get_buffer(avctx
, frame
, 0)) < 0)
110 dec_mode
= (buf
[0] >> 3) & 0x000F;
111 packet_size
= block_size
[dec_mode
] + 1;
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
;
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]);
122 Decoder_Interface_Decode(s
->dec_state
, buf
, (short *)frame
->data
[0], 0);
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
,
140 #endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */
142 #if CONFIG_LIBOPENCORE_AMRNB_ENCODER
143 /* Common code for fixed and float version*/
144 typedef struct AMR_bitrates
{
149 /* Match desired bitrate */
150 static int get_bitrate_mode(int bitrate
, void *log_ctx
)
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
}
157 int i
, best
= -1, min_diff
= 0;
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
) {
165 min_diff
= abs(rates
[i
].rate
- bitrate
);
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
);
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
},
183 static const AVClass amrnb_class
= {
184 "libopencore_amrnb", av_default_item_name
, options
, LIBAVUTIL_VERSION_INT
187 static av_cold
int amr_nb_encode_init(AVCodecContext
*avctx
)
189 AMRContext
*s
= avctx
->priv_data
;
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
);
196 if (avctx
->channels
!= 1) {
197 av_log(avctx
, AV_LOG_ERROR
, "Only mono supported\n");
198 return AVERROR(ENOSYS
);
201 avctx
->frame_size
= 160;
203 ff_af_queue_init(avctx
, &s
->afq
);
205 s
->enc_state
= Encoder_Interface_init(s
->enc_dtx
);
207 av_log(avctx
, AV_LOG_ERROR
, "Encoder_Interface_init error\n");
211 s
->enc_mode
= get_bitrate_mode(avctx
->bit_rate
, avctx
);
212 s
->enc_bitrate
= avctx
->bit_rate
;
217 static av_cold
int amr_nb_encode_close(AVCodecContext
*avctx
)
219 AMRContext
*s
= avctx
->priv_data
;
221 Encoder_Interface_exit(s
->enc_state
);
222 ff_af_queue_close(&s
->afq
);
226 static int amr_nb_encode_frame(AVCodecContext
*avctx
, AVPacket
*avpkt
,
227 const AVFrame
*frame
, int *got_packet_ptr
)
229 AMRContext
*s
= avctx
->priv_data
;
231 int16_t *flush_buf
= NULL
;
232 const int16_t *samples
= frame
? (const int16_t *)frame
->data
[0] : NULL
;
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
;
239 if ((ret
= ff_alloc_packet2(avctx
, avpkt
, 32)) < 0)
243 if (frame
->nb_samples
< avctx
->frame_size
) {
244 flush_buf
= av_mallocz_array(avctx
->frame_size
, sizeof(*flush_buf
));
246 return AVERROR(ENOMEM
);
247 memcpy(flush_buf
, samples
, frame
->nb_samples
* sizeof(*flush_buf
));
249 if (frame
->nb_samples
< avctx
->frame_size
- avctx
->delay
)
250 s
->enc_last_frame
= -1;
252 if ((ret
= ff_af_queue_add(&s
->afq
, frame
)) < 0) {
253 av_freep(&flush_buf
);
257 if (s
->enc_last_frame
< 0)
259 flush_buf
= av_mallocz_array(avctx
->frame_size
, sizeof(*flush_buf
));
261 return AVERROR(ENOMEM
);
263 s
->enc_last_frame
= -1;
266 written
= Encoder_Interface_Encode(s
->enc_state
, s
->enc_mode
, samples
,
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]);
271 /* Get the next frame pts/duration */
272 ff_af_queue_remove(&s
->afq
, avctx
->frame_size
, &avpkt
->pts
,
275 avpkt
->size
= written
;
277 av_freep(&flush_buf
);
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
,
295 #endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */
297 #endif /* CONFIG_LIBOPENCORE_AMRNB */
299 /* -----------AMR wideband ------------*/
300 #if CONFIG_LIBOPENCORE_AMRWB_DECODER
302 #include <opencore-amrwb/dec_if.h>
303 #include <opencore-amrwb/if_rom.h>
305 typedef struct AMRWBContext
{
309 static av_cold
int amr_wb_decode_init(AVCodecContext
*avctx
)
311 AMRWBContext
*s
= avctx
->priv_data
;
314 if ((ret
= amr_decode_fix_avctx(avctx
)) < 0)
317 s
->state
= D_IF_init();
322 static int amr_wb_decode_frame(AVCodecContext
*avctx
, void *data
,
323 int *got_frame_ptr
, AVPacket
*avpkt
)
325 AVFrame
*frame
= data
;
326 const uint8_t *buf
= avpkt
->data
;
327 int buf_size
= avpkt
->size
;
328 AMRWBContext
*s
= avctx
->priv_data
;
331 static const uint8_t block_size
[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
333 /* get output buffer */
334 frame
->nb_samples
= 320;
335 if ((ret
= ff_get_buffer(avctx
, frame
, 0)) < 0)
338 mode
= (buf
[0] >> 3) & 0x000F;
339 packet_size
= block_size
[mode
];
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
;
347 av_log(avctx
, AV_LOG_ERROR
, "amr packet_size invalid\n");
348 return AVERROR_INVALIDDATA
;
351 D_IF_decode(s
->state
, buf
, (short *)frame
->data
[0], _good_frame
);
358 static int amr_wb_decode_close(AVCodecContext
*avctx
)
360 AMRWBContext
*s
= avctx
->priv_data
;
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
,
378 #endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */