FFmpeg
sbcdec.c
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1 /*
2  * Bluetooth low-complexity, subband codec (SBC)
3  *
4  * Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org>
5  * Copyright (C) 2012-2013 Intel Corporation
6  * Copyright (C) 2008-2010 Nokia Corporation
7  * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
8  * Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
9  * Copyright (C) 2005-2008 Brad Midgley <bmidgley@xmission.com>
10  *
11  * This file is part of FFmpeg.
12  *
13  * FFmpeg is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU Lesser General Public
15  * License as published by the Free Software Foundation; either
16  * version 2.1 of the License, or (at your option) any later version.
17  *
18  * FFmpeg is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21  * Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with FFmpeg; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26  */
27 
28 /**
29  * @file
30  * SBC decoder implementation
31  */
32 
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "libavutil/intreadwrite.h"
36 #include "sbc.h"
37 #include "sbcdec_data.h"
38 
40  int32_t V[2][170];
41  int offset[2][16];
42 };
43 
44 typedef struct SBCDecContext {
45  AVClass *class;
49 
50 /*
51  * Unpacks a SBC frame at the beginning of the stream in data,
52  * which has at most len bytes into frame.
53  * Returns the length in bytes of the packed frame, or a negative
54  * value on error. The error codes are:
55  *
56  * -1 Data stream too short
57  * -2 Sync byte incorrect
58  * -3 CRC8 incorrect
59  * -4 Bitpool value out of bounds
60  */
61 static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame,
62  size_t len)
63 {
64  unsigned int consumed;
65  /* Will copy the parts of the header that are relevant to crc
66  * calculation here */
67  uint8_t crc_header[11] = { 0 };
68  int crc_pos;
69  int32_t temp;
70 
71  uint32_t audio_sample;
72  int ch, sb, blk, bit; /* channel, subband, block and bit standard
73  counters */
74  int bits[2][8]; /* bits distribution */
75  uint32_t levels[2][8]; /* levels derived from that */
76 
77  if (len < 4)
78  return -1;
79 
80  if (data[0] == MSBC_SYNCWORD) {
81  if (data[1] != 0)
82  return -2;
83  if (data[2] != 0)
84  return -2;
85 
86  frame->frequency = SBC_FREQ_16000;
87  frame->blocks = MSBC_BLOCKS;
88  frame->allocation = LOUDNESS;
89  frame->mode = MONO;
90  frame->channels = 1;
91  frame->subbands = 8;
92  frame->bitpool = 26;
93  } else if (data[0] == SBC_SYNCWORD) {
94  frame->frequency = (data[1] >> 6) & 0x03;
95  frame->blocks = 4 * ((data[1] >> 4) & 0x03) + 4;
96  frame->mode = (data[1] >> 2) & 0x03;
97  frame->channels = frame->mode == MONO ? 1 : 2;
98  frame->allocation = (data[1] >> 1) & 0x01;
99  frame->subbands = data[1] & 0x01 ? 8 : 4;
100  frame->bitpool = data[2];
101 
102  if ((frame->mode == MONO || frame->mode == DUAL_CHANNEL) &&
103  frame->bitpool > 16 * frame->subbands)
104  return -4;
105 
106  if ((frame->mode == STEREO || frame->mode == JOINT_STEREO) &&
107  frame->bitpool > 32 * frame->subbands)
108  return -4;
109  } else
110  return -2;
111 
112  consumed = 32;
113  crc_header[0] = data[1];
114  crc_header[1] = data[2];
115  crc_pos = 16;
116 
117  if (frame->mode == JOINT_STEREO) {
118  if (len * 8 < consumed + frame->subbands)
119  return -1;
120 
121  frame->joint = 0x00;
122  for (sb = 0; sb < frame->subbands - 1; sb++)
123  frame->joint |= ((data[4] >> (7 - sb)) & 0x01) << sb;
124  if (frame->subbands == 4)
125  crc_header[crc_pos / 8] = data[4] & 0xf0;
126  else
127  crc_header[crc_pos / 8] = data[4];
128 
129  consumed += frame->subbands;
130  crc_pos += frame->subbands;
131  }
132 
133  if (len * 8 < consumed + (4 * frame->subbands * frame->channels))
134  return -1;
135 
136  for (ch = 0; ch < frame->channels; ch++) {
137  for (sb = 0; sb < frame->subbands; sb++) {
138  /* FIXME assert(consumed % 4 == 0); */
139  frame->scale_factor[ch][sb] =
140  (data[consumed >> 3] >> (4 - (consumed & 0x7))) & 0x0F;
141  crc_header[crc_pos >> 3] |=
142  frame->scale_factor[ch][sb] << (4 - (crc_pos & 0x7));
143 
144  consumed += 4;
145  crc_pos += 4;
146  }
147  }
148 
149  if (data[3] != ff_sbc_crc8(frame->crc_ctx, crc_header, crc_pos))
150  return -3;
151 
152  ff_sbc_calculate_bits(frame, bits);
153 
154  for (ch = 0; ch < frame->channels; ch++) {
155  for (sb = 0; sb < frame->subbands; sb++)
156  levels[ch][sb] = (1 << bits[ch][sb]) - 1;
157  }
158 
159  for (blk = 0; blk < frame->blocks; blk++) {
160  for (ch = 0; ch < frame->channels; ch++) {
161  for (sb = 0; sb < frame->subbands; sb++) {
162  uint32_t shift;
163 
164  if (levels[ch][sb] == 0) {
165  frame->sb_sample[blk][ch][sb] = 0;
166  continue;
167  }
168 
169  shift = frame->scale_factor[ch][sb] +
171 
172  audio_sample = 0;
173  for (bit = 0; bit < bits[ch][sb]; bit++) {
174  if (consumed > len * 8)
175  return -1;
176 
177  if ((data[consumed >> 3] >> (7 - (consumed & 0x7))) & 0x01)
178  audio_sample |= 1 << (bits[ch][sb] - bit - 1);
179 
180  consumed++;
181  }
182 
183  frame->sb_sample[blk][ch][sb] = (int32_t)
184  (((((uint64_t) audio_sample << 1) | 1) << shift) /
185  levels[ch][sb]) - (1 << shift);
186  }
187  }
188  }
189 
190  if (frame->mode == JOINT_STEREO) {
191  for (blk = 0; blk < frame->blocks; blk++) {
192  for (sb = 0; sb < frame->subbands; sb++) {
193  if (frame->joint & (0x01 << sb)) {
194  temp = frame->sb_sample[blk][0][sb] +
195  frame->sb_sample[blk][1][sb];
196  frame->sb_sample[blk][1][sb] =
197  frame->sb_sample[blk][0][sb] -
198  frame->sb_sample[blk][1][sb];
199  frame->sb_sample[blk][0][sb] = temp;
200  }
201  }
202  }
203  }
204 
205  if ((consumed & 0x7) != 0)
206  consumed += 8 - (consumed & 0x7);
207 
208  return consumed >> 3;
209 }
210 
211 static inline void sbc_synthesize_four(struct sbc_decoder_state *state,
212  struct sbc_frame *frame,
213  int ch, int blk, AVFrame *output_frame)
214 {
215  int i, k, idx;
216  int32_t *v = state->V[ch];
217  int *offset = state->offset[ch];
218 
219  for (i = 0; i < 8; i++) {
220  /* Shifting */
221  offset[i]--;
222  if (offset[i] < 0) {
223  offset[i] = 79;
224  memcpy(v + 80, v, 9 * sizeof(*v));
225  }
226 
227  /* Distribute the new matrix value to the shifted position */
228  v[offset[i]] =
229  (int)( (unsigned)ff_synmatrix4[i][0] * frame->sb_sample[blk][ch][0] +
230  (unsigned)ff_synmatrix4[i][1] * frame->sb_sample[blk][ch][1] +
231  (unsigned)ff_synmatrix4[i][2] * frame->sb_sample[blk][ch][2] +
232  (unsigned)ff_synmatrix4[i][3] * frame->sb_sample[blk][ch][3] ) >> 15;
233  }
234 
235  /* Compute the samples */
236  for (idx = 0, i = 0; i < 4; i++, idx += 5) {
237  k = (i + 4) & 0xf;
238 
239  /* Store in output, Q0 */
240  AV_WN16A(&output_frame->data[ch][blk * 8 + i * 2], av_clip_int16(
241  (int)( (unsigned)v[offset[i] + 0] * ff_sbc_proto_4_40m0[idx + 0] +
242  (unsigned)v[offset[k] + 1] * ff_sbc_proto_4_40m1[idx + 0] +
243  (unsigned)v[offset[i] + 2] * ff_sbc_proto_4_40m0[idx + 1] +
244  (unsigned)v[offset[k] + 3] * ff_sbc_proto_4_40m1[idx + 1] +
245  (unsigned)v[offset[i] + 4] * ff_sbc_proto_4_40m0[idx + 2] +
246  (unsigned)v[offset[k] + 5] * ff_sbc_proto_4_40m1[idx + 2] +
247  (unsigned)v[offset[i] + 6] * ff_sbc_proto_4_40m0[idx + 3] +
248  (unsigned)v[offset[k] + 7] * ff_sbc_proto_4_40m1[idx + 3] +
249  (unsigned)v[offset[i] + 8] * ff_sbc_proto_4_40m0[idx + 4] +
250  (unsigned)v[offset[k] + 9] * ff_sbc_proto_4_40m1[idx + 4] ) >> 15));
251  }
252 }
253 
254 static inline void sbc_synthesize_eight(struct sbc_decoder_state *state,
255  struct sbc_frame *frame,
256  int ch, int blk, AVFrame *output_frame)
257 {
258  int i, k, idx;
259  int32_t *v = state->V[ch];
260  int *offset = state->offset[ch];
261 
262  for (i = 0; i < 16; i++) {
263  /* Shifting */
264  offset[i]--;
265  if (offset[i] < 0) {
266  offset[i] = 159;
267  memcpy(v + 160, v, 9 * sizeof(*v));
268  }
269 
270  /* Distribute the new matrix value to the shifted position */
271  v[offset[i]] =
272  (int)( (unsigned)ff_synmatrix8[i][0] * frame->sb_sample[blk][ch][0] +
273  (unsigned)ff_synmatrix8[i][1] * frame->sb_sample[blk][ch][1] +
274  (unsigned)ff_synmatrix8[i][2] * frame->sb_sample[blk][ch][2] +
275  (unsigned)ff_synmatrix8[i][3] * frame->sb_sample[blk][ch][3] +
276  (unsigned)ff_synmatrix8[i][4] * frame->sb_sample[blk][ch][4] +
277  (unsigned)ff_synmatrix8[i][5] * frame->sb_sample[blk][ch][5] +
278  (unsigned)ff_synmatrix8[i][6] * frame->sb_sample[blk][ch][6] +
279  (unsigned)ff_synmatrix8[i][7] * frame->sb_sample[blk][ch][7] ) >> 15;
280  }
281 
282  /* Compute the samples */
283  for (idx = 0, i = 0; i < 8; i++, idx += 5) {
284  k = (i + 8) & 0xf;
285 
286  /* Store in output, Q0 */
287  AV_WN16A(&output_frame->data[ch][blk * 16 + i * 2], av_clip_int16(
288  (int)( (unsigned)v[offset[i] + 0] * ff_sbc_proto_8_80m0[idx + 0] +
289  (unsigned)v[offset[k] + 1] * ff_sbc_proto_8_80m1[idx + 0] +
290  (unsigned)v[offset[i] + 2] * ff_sbc_proto_8_80m0[idx + 1] +
291  (unsigned)v[offset[k] + 3] * ff_sbc_proto_8_80m1[idx + 1] +
292  (unsigned)v[offset[i] + 4] * ff_sbc_proto_8_80m0[idx + 2] +
293  (unsigned)v[offset[k] + 5] * ff_sbc_proto_8_80m1[idx + 2] +
294  (unsigned)v[offset[i] + 6] * ff_sbc_proto_8_80m0[idx + 3] +
295  (unsigned)v[offset[k] + 7] * ff_sbc_proto_8_80m1[idx + 3] +
296  (unsigned)v[offset[i] + 8] * ff_sbc_proto_8_80m0[idx + 4] +
297  (unsigned)v[offset[k] + 9] * ff_sbc_proto_8_80m1[idx + 4] ) >> 15));
298  }
299 }
300 
303 {
304  int ch, blk;
305 
306  switch (frame->subbands) {
307  case 4:
308  for (ch = 0; ch < frame->channels; ch++)
309  for (blk = 0; blk < frame->blocks; blk++)
310  sbc_synthesize_four(state, frame, ch, blk, output_frame);
311  break;
312 
313  case 8:
314  for (ch = 0; ch < frame->channels; ch++)
315  for (blk = 0; blk < frame->blocks; blk++)
316  sbc_synthesize_eight(state, frame, ch, blk, output_frame);
317  break;
318  }
319 }
320 
321 static int sbc_decode_init(AVCodecContext *avctx)
322 {
323  SBCDecContext *sbc = avctx->priv_data;
324  int i, ch;
325 
327 
329 
330  memset(sbc->dsp.V, 0, sizeof(sbc->dsp.V));
331  for (ch = 0; ch < 2; ch++)
332  for (i = 0; i < FF_ARRAY_ELEMS(sbc->dsp.offset[0]); i++)
333  sbc->dsp.offset[ch][i] = (10 * i + 10);
334  return 0;
335 }
336 
338  void *data, int *got_frame_ptr,
339  AVPacket *avpkt)
340 {
341  SBCDecContext *sbc = avctx->priv_data;
342  AVFrame *frame = data;
343  int ret, frame_length;
344 
345  if (!sbc)
346  return AVERROR(EIO);
347 
348  frame_length = sbc_unpack_frame(avpkt->data, &sbc->frame, avpkt->size);
349  if (frame_length <= 0)
350  return frame_length;
351 
352  avctx->channels = sbc->frame.channels;
353 
354  frame->nb_samples = sbc->frame.blocks * sbc->frame.subbands;
355  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
356  return ret;
357 
358  sbc_synthesize_audio(&sbc->dsp, &sbc->frame, frame);
359 
360  *got_frame_ptr = 1;
361 
362  return frame_length;
363 }
364 
366  .name = "sbc",
367  .long_name = NULL_IF_CONFIG_SMALL("SBC (low-complexity subband codec)"),
368  .type = AVMEDIA_TYPE_AUDIO,
369  .id = AV_CODEC_ID_SBC,
370  .priv_data_size = sizeof(SBCDecContext),
373  .capabilities = AV_CODEC_CAP_DR1,
374  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
375  .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
377  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
379  .supported_samplerates = (const int[]) { 16000, 32000, 44100, 48000, 0 },
380 };
static int shift(int a, int b)
Definition: sonic.c:82
int32_t V[2][170]
Definition: sbcdec.c:40
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
AVCodec ff_sbc_decoder
Definition: sbcdec.c:365
#define JOINT_STEREO
Definition: atrac3.c:55
#define SBC_FREQ_16000
Definition: sbc.h:42
else temp
Definition: vf_mcdeint.c:256
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static void sbc_synthesize_four(struct sbc_decoder_state *state, struct sbc_frame *frame, int ch, int blk, AVFrame *output_frame)
Definition: sbcdec.c:211
int size
Definition: packet.h:356
const int32_t ff_sbc_proto_4_40m1[]
Definition: sbcdec_data.c:49
#define AV_CH_LAYOUT_STEREO
static void sbc_synthesize_audio(struct sbc_decoder_state *state, struct sbc_frame *frame, AVFrame *output_frame)
Definition: sbcdec.c:301
const int32_t ff_sbc_proto_8_80m0[]
Definition: sbcdec_data.c:57
#define blk(i)
Definition: sha.c:185
AVCodec.
Definition: codec.h:190
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static struct @315 state
const int32_t ff_synmatrix8[16][8]
Definition: sbcdec_data.c:94
enum sbc_frame::@131 allocation
enum sbc_frame::@130 mode
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
#define MSBC_BLOCKS
Definition: sbc.h:39
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1194
uint8_t
struct sbc_decoder_state dsp
Definition: sbcdec.c:47
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
uint8_t * data
Definition: packet.h:355
const int32_t ff_synmatrix4[8][4]
Definition: sbcdec_data.c:83
SBC decoder tables.
uint32_t scale_factor[2][8]
Definition: sbc.h:104
uint8_t bitpool
Definition: sbc.h:97
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
const char * name
Name of the codec implementation.
Definition: codec.h:197
uint8_t bits
Definition: vp3data.h:202
uint8_t channels
Definition: sbc.h:91
int32_t
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define AV_WN16A(p, v)
Definition: intreadwrite.h:534
uint8_t ff_sbc_crc8(const AVCRC *ctx, const uint8_t *data, size_t len)
Definition: sbc.c:55
const int32_t ff_sbc_proto_4_40m0[]
Definition: sbcdec_data.c:41
#define FF_ARRAY_ELEMS(a)
#define MSBC_SYNCWORD
Definition: sbc.h:69
static int sbc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: sbcdec.c:337
Libavcodec external API header.
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
const int32_t ff_sbc_proto_8_80m1[]
Definition: sbcdec_data.c:70
static void sbc_synthesize_eight(struct sbc_decoder_state *state, struct sbc_frame *frame, int ch, int blk, AVFrame *output_frame)
Definition: sbcdec.c:254
main external API structure.
Definition: avcodec.h:526
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1854
static int sbc_decode_init(AVCodecContext *avctx)
Definition: sbcdec.c:321
int offset[2][16]
Definition: sbcdec.c:41
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
Definition: h264dec.c:824
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
Describe the class of an AVClass context structure.
Definition: log.h:67
uint8_t frequency
Definition: sbc.h:83
#define MONO
Definition: cook.c:60
static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame, size_t len)
Definition: sbcdec.c:61
#define SBC_ALIGN
Definition: sbc.h:78
uint8_t joint
Definition: sbc.h:101
#define SBCDEC_FIXED_EXTRA_BITS
Definition: sbc.h:72
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0f/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(UINT64_C(1)<< 63)))#define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};static void cpy1(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, len);}static void cpy2(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 2 *len);}static void cpy4(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 4 *len);}static void cpy8(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);return ctx;}void swri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len){int ch;int off=0;const int os=(out->planar?1:out->ch_count)*out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){int planes=in->planar?in->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){int planes=out->planar?out->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){int planes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
#define LOUDNESS(energy)
Definition: f_ebur128.c:478
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
int
common internal api header.
#define STEREO
Definition: cook.c:61
#define bit(string, value)
Definition: cbs_mpeg2.c:58
const AVCRC * crc_ctx
Definition: sbc.h:112
SBC common definitions for the encoder and decoder.
void * priv_data
Definition: avcodec.h:553
#define xf(width, name, var, range_min, range_max, subs,...)
Definition: cbs_av1.c:663
struct sbc_frame frame
Definition: sbcdec.c:46
int len
int channels
number of audio channels
Definition: avcodec.h:1187
void ff_sbc_calculate_bits(const struct sbc_frame *frame, int(*bits)[8])
Definition: sbc.c:79
Definition: sbc.h:82
signed 16 bits, planar
Definition: samplefmt.h:67
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define AV_CH_LAYOUT_MONO
This structure stores compressed data.
Definition: packet.h:332
uint8_t subbands
Definition: sbc.h:96
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:374
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
#define SBC_SYNCWORD
Definition: sbc.h:68
int i
Definition: input.c:406
int32_t sb_sample[16][2][8]
Definition: sbc.h:110
uint8_t blocks
Definition: sbc.h:84