Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. |
| 4 | * Not a Contribution. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <stdarg.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <unistd.h> |
| 25 | #include <dlfcn.h> |
| 26 | #include <math.h> |
| 27 | |
| 28 | #define LOG_TAG "AudioBitstreamStateMachine" |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 29 | #define LOG_NDEBUG 0 |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 30 | #define LOG_NDDEBUG 0 |
| 31 | #include <utils/Log.h> |
| 32 | |
| 33 | #include <cutils/properties.h> |
| 34 | #include "audio_hw.h" |
| 35 | #include "platform_api.h" |
| 36 | #include <platform.h> |
| 37 | // ---------------------------------------------------------------------------- |
| 38 | |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 39 | /* |
| 40 | Initialize all input and output pointers |
| 41 | Allocate twice the max buffer size of input and output for sufficient buffering |
| 42 | */ |
| 43 | int audio_bitstream_init(struct audio_bitstream_sm *bstream, int buffering_factor) |
| 44 | { |
| 45 | bstream->buffering_factor = buffering_factor; |
| 46 | bstream->buffering_factor_cnt = 0; |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 47 | bstream->inp_buf_size = SAMPLES_PER_CHANNEL * |
| 48 | MAX_INPUT_CHANNELS_SUPPORTED* |
| 49 | (bstream->buffering_factor+1); |
| 50 | bstream->inp_buf = (char *)malloc( bstream->inp_buf_size); |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 51 | |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 52 | // multiplied by 2 to convert to bytes |
| 53 | if(bstream->inp_buf != NULL) { |
| 54 | bstream->inp_buf_curr_ptr = bstream->inp_buf; |
| 55 | bstream->inp_buf_write_ptr = bstream->inp_buf; |
| 56 | } else { |
| 57 | ALOGE("MS11 input buffer not allocated"); |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 58 | bstream->inp_buf_size = 0; |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 59 | return 0; |
| 60 | } |
| 61 | |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 62 | bstream->enc_out_buf_size = SAMPLES_PER_CHANNEL * MAX_INPUT_CHANNELS_SUPPORTED* |
| 63 | FACTOR_FOR_BUFFERING; |
| 64 | bstream->enc_out_buf =(char *)malloc(bstream->enc_out_buf_size); |
| 65 | |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 66 | if(bstream->enc_out_buf) { |
| 67 | bstream->enc_out_buf_write_ptr = bstream->enc_out_buf; |
| 68 | } else { |
| 69 | ALOGE("MS11 Enc output buffer not allocated"); |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 70 | bstream->enc_out_buf_size = 0; |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 71 | return 0; |
| 72 | } |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 73 | bstream->pcm_2_out_buf_size = SAMPLES_PER_CHANNEL*STEREO_CHANNELS * |
| 74 | FACTOR_FOR_BUFFERING; |
| 75 | bstream->pcm_2_out_buf =(char *)malloc(bstream->pcm_2_out_buf_size); |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 76 | if(bstream->pcm_2_out_buf) { |
| 77 | bstream->pcm_2_out_buf_write_ptr = bstream->pcm_2_out_buf; |
| 78 | } else { |
| 79 | ALOGE("MS11 PCM2Ch output buffer not allocated"); |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 80 | bstream->pcm_2_out_buf_size = 0; |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 81 | return 0; |
| 82 | } |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 83 | bstream->pcm_mch_out_buf_size = SAMPLES_PER_CHANNEL * MAX_OUTPUT_CHANNELS_SUPPORTED * |
| 84 | FACTOR_FOR_BUFFERING; |
| 85 | |
| 86 | bstream->pcm_mch_out_buf =(char *)malloc(bstream->pcm_mch_out_buf_size); |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 87 | if(bstream->pcm_mch_out_buf) { |
| 88 | bstream->pcm_mch_out_buf_write_ptr = bstream->pcm_mch_out_buf; |
| 89 | } else { |
| 90 | ALOGE("MS11 PCMMCh output buffer not allocated"); |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 91 | bstream->pcm_mch_out_buf_size = 0; |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 92 | return 0; |
| 93 | } |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 94 | bstream->passt_out_buf_size =SAMPLES_PER_CHANNEL * |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 95 | MAX_INPUT_CHANNELS_SUPPORTED * |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 96 | FACTOR_FOR_BUFFERING; |
| 97 | bstream->passt_out_buf =(char *)malloc(bstream->passt_out_buf_size); |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 98 | if(bstream->passt_out_buf) { |
| 99 | bstream->passt_out_buf_write_ptr = bstream->passt_out_buf; |
| 100 | } else { |
| 101 | ALOGE("MS11 Enc output buffer not allocated"); |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 102 | bstream->passt_out_buf_size = 0; |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 103 | return 0; |
| 104 | } |
| 105 | return 1; |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | Free the allocated memory |
| 110 | */ |
| 111 | int audio_bitstream_close(struct audio_bitstream_sm *bstream) |
| 112 | { |
| 113 | if(bstream->inp_buf != NULL) { |
| 114 | free(bstream->inp_buf); |
| 115 | bstream->inp_buf = NULL; |
| 116 | } |
| 117 | if(bstream->enc_out_buf != NULL) { |
| 118 | free(bstream->enc_out_buf); |
| 119 | bstream->enc_out_buf = NULL; |
| 120 | } |
| 121 | if(bstream->pcm_2_out_buf != NULL) { |
| 122 | free(bstream->pcm_2_out_buf); |
| 123 | bstream->pcm_2_out_buf = NULL; |
| 124 | } |
| 125 | if(bstream->pcm_mch_out_buf != NULL) { |
| 126 | free(bstream->pcm_mch_out_buf); |
| 127 | bstream->pcm_mch_out_buf = NULL; |
| 128 | } |
| 129 | if(bstream->passt_out_buf != NULL) { |
| 130 | free(bstream->passt_out_buf); |
| 131 | bstream->passt_out_buf = NULL; |
| 132 | } |
| 133 | bstream->buffering_factor = 1; |
| 134 | bstream->buffering_factor_cnt = 0; |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | Reset the buffer pointers to start for. This will be help in flush and close |
| 140 | */ |
| 141 | void audio_bitstream_reset_ptr( struct audio_bitstream_sm *bstream) |
| 142 | { |
| 143 | bstream->inp_buf_curr_ptr = bstream->inp_buf_write_ptr = bstream->inp_buf; |
| 144 | bstream->enc_out_buf_write_ptr = bstream->enc_out_buf; |
| 145 | bstream->pcm_2_out_buf_write_ptr = bstream->pcm_2_out_buf; |
| 146 | bstream->pcm_mch_out_buf_write_ptr = bstream->pcm_mch_out_buf; |
| 147 | bstream->passt_out_buf_write_ptr = bstream->passt_out_buf; |
| 148 | bstream->buffering_factor_cnt = 0; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | Reset the output buffer pointers to start for port reconfiguration |
| 153 | */ |
| 154 | void audio_bitstream_reset_output_bitstream_ptr( |
| 155 | struct audio_bitstream_sm *bstream) |
| 156 | { |
| 157 | bstream->enc_out_buf_write_ptr = bstream->enc_out_buf; |
| 158 | bstream->pcm_2_out_buf_write_ptr = bstream->pcm_2_out_buf; |
| 159 | bstream->pcm_mch_out_buf_write_ptr = bstream->pcm_mch_out_buf; |
| 160 | bstream->passt_out_buf_write_ptr = bstream->passt_out_buf; |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | Copy the bitstream/pcm from Player to internal buffer. |
| 165 | The incoming bitstream is appended to existing bitstream |
| 166 | */ |
| 167 | void audio_bitstream_copy_to_internal_buffer( |
| 168 | struct audio_bitstream_sm *bstream, |
| 169 | char *buf_ptr, size_t bytes) |
| 170 | { |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 171 | // flush the input buffer if input is not consumed |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 172 | if( (bstream->inp_buf_write_ptr+bytes) > (bstream->inp_buf+bstream->inp_buf_size) ) { |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 173 | ALOGE("Input bitstream is not consumed"); |
| 174 | return; |
| 175 | } |
| 176 | |
| 177 | memcpy(bstream->inp_buf_write_ptr, buf_ptr, bytes); |
| 178 | bstream->inp_buf_write_ptr += bytes; |
| 179 | if(bstream->buffering_factor_cnt < bstream->buffering_factor) |
| 180 | bstream->buffering_factor_cnt++; |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | Append zeros to the bitstream, so that the entire bitstream in ADIF is pushed |
| 185 | out for decoding |
| 186 | */ |
| 187 | void audio_bitstream_append_silence_internal_buffer( |
| 188 | struct audio_bitstream_sm *bstream, |
| 189 | uint32_t bytes, unsigned char value) |
| 190 | { |
| 191 | int32_t bufLen = SAMPLES_PER_CHANNEL*MAX_INPUT_CHANNELS_SUPPORTED* |
| 192 | (bstream->buffering_factor+1); |
| 193 | uint32_t i = 0; |
| 194 | if( (bstream->inp_buf_write_ptr+bytes) > (bstream->inp_buf+bufLen) ) { |
| 195 | bytes = bufLen + bstream->inp_buf - bstream->inp_buf_write_ptr; |
| 196 | } |
| 197 | for(i=0; i< bytes; i++) |
| 198 | *bstream->inp_buf_write_ptr++ = value; |
| 199 | if(bstream->buffering_factor_cnt < bstream->buffering_factor) |
| 200 | bstream->buffering_factor_cnt++; |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | Flags if sufficient bitstream is available to proceed to decode based on |
| 205 | the threshold |
| 206 | */ |
| 207 | int audio_bitstream_sufficient_buffer_to_decode( |
| 208 | struct audio_bitstream_sm *bstream, |
| 209 | int min_bytes_to_decode) |
| 210 | { |
| 211 | int proceed_decode = 0; |
| 212 | if( (bstream->inp_buf_write_ptr -\ |
| 213 | bstream->inp_buf_curr_ptr) > min_bytes_to_decode) |
| 214 | proceed_decode = 1; |
| 215 | return proceed_decode; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | Gets the start address of the bitstream buffer. This is used for start of decode |
| 220 | */ |
| 221 | char* audio_bitstream_get_input_buffer_ptr( |
| 222 | struct audio_bitstream_sm *bstream) |
| 223 | { |
| 224 | return bstream->inp_buf_curr_ptr; |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | Gets the writePtr of the bitstream buffer. This is used for calculating length of |
| 229 | bitstream |
| 230 | */ |
| 231 | char* audio_bitstream_get_input_buffer_write_ptr( |
| 232 | struct audio_bitstream_sm *bstream) |
| 233 | { |
| 234 | return bstream->inp_buf_write_ptr; |
| 235 | } |
| 236 | |
Dhananjay Kumar | 09cbbf0 | 2013-11-25 15:49:57 +0530 | [diff] [blame] | 237 | int audio_bitstream_set_input_buffer_ptr( |
| 238 | struct audio_bitstream_sm *bstream, int bytes) |
| 239 | { |
| 240 | if(((bstream->inp_buf_curr_ptr + bytes) <= |
| 241 | (bstream->inp_buf + bstream->inp_buf_size)) && |
| 242 | ((bstream->inp_buf_curr_ptr + bytes) >= bstream->inp_buf)) |
| 243 | |
| 244 | bstream->inp_buf_curr_ptr += bytes; |
| 245 | else { |
| 246 | ALOGE("Invalid input buffer size %d bytes", bytes); |
| 247 | return -EINVAL; |
| 248 | } |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | int audio_bitstream_set_input_buffer_write_ptr( |
| 254 | struct audio_bitstream_sm *bstream, int bytes) |
| 255 | { |
| 256 | if(((bstream->inp_buf_write_ptr + bytes) <= |
| 257 | (bstream->inp_buf + bstream->inp_buf_size)) && |
| 258 | ((bstream->inp_buf_write_ptr + bytes) >= bstream->inp_buf)) |
| 259 | |
| 260 | bstream->inp_buf_write_ptr += bytes; |
| 261 | else { |
| 262 | ALOGE("Invalid input buffer size %d bytes", bytes); |
| 263 | return -EINVAL; |
| 264 | } |
| 265 | |
| 266 | return 0; |
| 267 | } |
| 268 | |
Dhananjay Kumar | 4e9a903 | 2013-11-18 16:41:48 +0530 | [diff] [blame] | 269 | /* |
| 270 | Get the output buffer start pointer to start rendering the pcm sampled to driver |
| 271 | */ |
| 272 | char* audio_bitstream_get_output_buffer_ptr( |
| 273 | struct audio_bitstream_sm *bstream, |
| 274 | int format) |
| 275 | { |
| 276 | switch(format) { |
| 277 | case PCM_MCH_OUT: |
| 278 | return bstream->pcm_mch_out_buf; |
| 279 | case PCM_2CH_OUT: |
| 280 | return bstream->pcm_2_out_buf; |
| 281 | case COMPRESSED_OUT: |
| 282 | return bstream->enc_out_buf; |
| 283 | case TRANSCODE_OUT: |
| 284 | return bstream->passt_out_buf; |
| 285 | default: |
| 286 | return NULL; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | Output the pointer from where the next PCM samples can be copied to buffer |
| 292 | */ |
| 293 | char* audio_bitstream_get_output_buffer_write_ptr( |
| 294 | struct audio_bitstream_sm *bstream, |
| 295 | int format) |
| 296 | { |
| 297 | switch(format) { |
| 298 | case PCM_MCH_OUT: |
| 299 | return bstream->pcm_mch_out_buf_write_ptr; |
| 300 | case PCM_2CH_OUT: |
| 301 | return bstream->pcm_2_out_buf_write_ptr; |
| 302 | case COMPRESSED_OUT: |
| 303 | return bstream->enc_out_buf_write_ptr; |
| 304 | case TRANSCODE_OUT: |
| 305 | return bstream->passt_out_buf_write_ptr; |
| 306 | default: |
| 307 | return NULL; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | Provides the bitstream size available in the internal buffer |
| 313 | */ |
| 314 | size_t audio_bitstream_get_size(struct audio_bitstream_sm *bstream) |
| 315 | { |
| 316 | return (bstream->inp_buf_write_ptr-bstream->inp_buf_curr_ptr); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | After decode, the residue bitstream in the buffer is moved to start, so as to |
| 321 | avoid circularity constraints |
| 322 | */ |
| 323 | void audio_bitstream_copy_residue_to_start( |
| 324 | struct audio_bitstream_sm *bstream, |
| 325 | size_t bytes_consumed_in_decode) |
| 326 | { |
| 327 | size_t remaining_curr_valid_bytes = bstream->inp_buf_write_ptr - |
| 328 | (bytes_consumed_in_decode+bstream->inp_buf_curr_ptr); |
| 329 | size_t remainingTotalBytes = bstream->inp_buf_write_ptr - |
| 330 | (bytes_consumed_in_decode+bstream->inp_buf); |
| 331 | if(bstream->buffering_factor_cnt == bstream->buffering_factor) { |
| 332 | memcpy(bstream->inp_buf, bstream->inp_buf+bytes_consumed_in_decode, remainingTotalBytes); |
| 333 | bstream->inp_buf_write_ptr = bstream->inp_buf+remainingTotalBytes; |
| 334 | bstream->inp_buf_curr_ptr = bstream->inp_buf_write_ptr-remaining_curr_valid_bytes; |
| 335 | } else { |
| 336 | bstream->inp_buf_curr_ptr += bytes_consumed_in_decode; |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | Remaing samples less than the one period size required for the pcm driver |
| 342 | is moved to start of the buffer |
| 343 | */ |
| 344 | void audio_bitstream_copy_residue_output_start( |
| 345 | struct audio_bitstream_sm *bstream, |
| 346 | int format, |
| 347 | size_t samplesRendered) |
| 348 | { |
| 349 | size_t remaining_bytes; |
| 350 | switch(format) { |
| 351 | case PCM_MCH_OUT: |
| 352 | remaining_bytes = bstream->pcm_mch_out_buf_write_ptr-\ |
| 353 | (bstream->pcm_mch_out_buf+samplesRendered); |
| 354 | memcpy(bstream->pcm_mch_out_buf, |
| 355 | bstream->pcm_mch_out_buf+samplesRendered, |
| 356 | remaining_bytes); |
| 357 | bstream->pcm_mch_out_buf_write_ptr = \ |
| 358 | bstream->pcm_mch_out_buf + remaining_bytes; |
| 359 | break; |
| 360 | case PCM_2CH_OUT: |
| 361 | remaining_bytes = bstream->pcm_2_out_buf_write_ptr-\ |
| 362 | (bstream->pcm_2_out_buf+samplesRendered); |
| 363 | memcpy(bstream->pcm_2_out_buf, |
| 364 | bstream->pcm_2_out_buf+samplesRendered, |
| 365 | remaining_bytes); |
| 366 | bstream->pcm_2_out_buf_write_ptr = \ |
| 367 | bstream->pcm_2_out_buf + remaining_bytes; |
| 368 | break; |
| 369 | case COMPRESSED_OUT: |
| 370 | remaining_bytes = bstream->enc_out_buf_write_ptr-\ |
| 371 | (bstream->enc_out_buf+samplesRendered); |
| 372 | memcpy(bstream->enc_out_buf, |
| 373 | bstream->enc_out_buf+samplesRendered, |
| 374 | remaining_bytes); |
| 375 | bstream->enc_out_buf_write_ptr = \ |
| 376 | bstream->enc_out_buf + remaining_bytes; |
| 377 | break; |
| 378 | case TRANSCODE_OUT: |
| 379 | remaining_bytes = bstream->passt_out_buf_write_ptr-\ |
| 380 | (bstream->passt_out_buf+samplesRendered); |
| 381 | memcpy(bstream->passt_out_buf, |
| 382 | bstream->passt_out_buf+samplesRendered, |
| 383 | remaining_bytes); |
| 384 | bstream->passt_out_buf_write_ptr = \ |
| 385 | bstream->passt_out_buf + remaining_bytes; |
| 386 | break; |
| 387 | default: |
| 388 | break; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | The write pointer is updated after the incoming PCM samples are copied to the |
| 394 | output buffer |
| 395 | */ |
| 396 | void audio_bitstream_set_output_buffer_write_ptr( |
| 397 | struct audio_bitstream_sm *bstream, |
| 398 | int format, size_t output_pcm_sample) |
| 399 | { |
| 400 | int alloc_bytes; |
| 401 | switch(format) { |
| 402 | case PCM_MCH_OUT: |
| 403 | alloc_bytes = SAMPLES_PER_CHANNEL*\ |
| 404 | MAX_OUTPUT_CHANNELS_SUPPORTED*FACTOR_FOR_BUFFERING; |
| 405 | if (bstream->pcm_mch_out_buf + alloc_bytes >\ |
| 406 | bstream->pcm_mch_out_buf_write_ptr + output_pcm_sample) |
| 407 | bstream->pcm_mch_out_buf_write_ptr += output_pcm_sample; |
| 408 | break; |
| 409 | case PCM_2CH_OUT: |
| 410 | alloc_bytes = SAMPLES_PER_CHANNEL*STEREO_CHANNELS*FACTOR_FOR_BUFFERING; |
| 411 | if(bstream->pcm_2_out_buf + alloc_bytes > \ |
| 412 | bstream->pcm_2_out_buf_write_ptr + output_pcm_sample) |
| 413 | bstream->pcm_2_out_buf_write_ptr += output_pcm_sample; |
| 414 | break; |
| 415 | case COMPRESSED_OUT: |
| 416 | alloc_bytes = SAMPLES_PER_CHANNEL*\ |
| 417 | MAX_INPUT_CHANNELS_SUPPORTED*FACTOR_FOR_BUFFERING; |
| 418 | if (bstream->enc_out_buf + alloc_bytes > \ |
| 419 | bstream->enc_out_buf_write_ptr + output_pcm_sample) |
| 420 | bstream->enc_out_buf_write_ptr += output_pcm_sample; |
| 421 | break; |
| 422 | case TRANSCODE_OUT: |
| 423 | alloc_bytes = SAMPLES_PER_CHANNEL*\ |
| 424 | MAX_INPUT_CHANNELS_SUPPORTED*FACTOR_FOR_BUFFERING; |
| 425 | if (bstream->passt_out_buf + alloc_bytes > \ |
| 426 | bstream->passt_out_buf_write_ptr + output_pcm_sample) |
| 427 | bstream->passt_out_buf_write_ptr += output_pcm_sample; |
| 428 | break; |
| 429 | default: |
| 430 | break; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | Flags if sufficient samples are available to render to PCM driver |
| 436 | */ |
| 437 | int audio_bitstream_sufficient_sample_to_render( |
| 438 | struct audio_bitstream_sm *bstream, |
| 439 | int format, int mid_size_reqd) |
| 440 | { |
| 441 | int status = 0; |
| 442 | char *buf_ptr = NULL, *buf_write_ptr = NULL; |
| 443 | switch(format) { |
| 444 | case PCM_MCH_OUT: |
| 445 | buf_ptr = bstream->pcm_mch_out_buf; |
| 446 | buf_write_ptr = bstream->pcm_mch_out_buf_write_ptr; |
| 447 | break; |
| 448 | case PCM_2CH_OUT: |
| 449 | buf_ptr = bstream->pcm_2_out_buf; |
| 450 | buf_write_ptr = bstream->pcm_2_out_buf_write_ptr; |
| 451 | break; |
| 452 | case COMPRESSED_OUT: |
| 453 | buf_ptr = bstream->enc_out_buf; |
| 454 | buf_write_ptr = bstream->enc_out_buf_write_ptr; |
| 455 | break; |
| 456 | case TRANSCODE_OUT: |
| 457 | buf_ptr = bstream->passt_out_buf; |
| 458 | buf_write_ptr = bstream->passt_out_buf_write_ptr; |
| 459 | break; |
| 460 | default: |
| 461 | break; |
| 462 | } |
| 463 | if( (buf_write_ptr-buf_ptr) >= mid_size_reqd ) |
| 464 | status = 1; |
| 465 | return status; |
| 466 | } |
| 467 | |
| 468 | void audio_bitstream_start_input_buffering_mode( |
| 469 | struct audio_bitstream_sm *bstream) |
| 470 | { |
| 471 | bstream->buffering_factor_cnt = 0; |
| 472 | } |
| 473 | |
| 474 | void audio_bitstream_stop_input_buffering_mode( |
| 475 | struct audio_bitstream_sm *bstream) |
| 476 | { |
| 477 | size_t remaining_curr_valid_bytes = \ |
| 478 | bstream->inp_buf_write_ptr - bstream->inp_buf_curr_ptr; |
| 479 | bstream->buffering_factor_cnt = bstream->buffering_factor; |
| 480 | memcpy(bstream->inp_buf, |
| 481 | bstream->inp_buf_curr_ptr, |
| 482 | remaining_curr_valid_bytes); |
| 483 | bstream->inp_buf_curr_ptr = bstream->inp_buf; |
| 484 | bstream->inp_buf_write_ptr = bstream->inp_buf + remaining_curr_valid_bytes; |
| 485 | } |