1/* 2 * generic decoding-related code 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#include <stdint.h> 22#include <string.h> 23 24#include "config.h" 25 26#if CONFIG_ICONV 27# include <iconv.h> 28#endif 29 30#include "libavutil/avassert.h" 31#include "libavutil/avstring.h" 32#include "libavutil/bprint.h" 33#include "libavutil/channel_layout.h" 34#include "libavutil/common.h" 35#include "libavutil/fifo.h" 36#include "libavutil/frame.h" 37#include "libavutil/hwcontext.h" 38#include "libavutil/imgutils.h" 39#include "libavutil/internal.h" 40#include "libavutil/intmath.h" 41#include "libavutil/opt.h" 42 43#include "avcodec.h" 44#include "bytestream.h" 45#include "bsf.h" 46#include "codec_internal.h" 47#include "decode.h" 48#include "hwconfig.h" 49#include "internal.h" 50#include "thread.h" 51 52static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt) 53{ 54 int ret; 55 size_t size; 56 const uint8_t *data; 57 uint32_t flags; 58 int64_t val; 59 60 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size); 61 if (!data) 62 return 0; 63 64 if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) { 65 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter " 66 "changes, but PARAM_CHANGE side data was sent to it.\n"); 67 ret = AVERROR(EINVAL); 68 goto fail2; 69 } 70 71 if (size < 4) 72 goto fail; 73 74 flags = bytestream_get_le32(&data); 75 size -= 4; 76 77#if FF_API_OLD_CHANNEL_LAYOUT 78FF_DISABLE_DEPRECATION_WARNINGS 79 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { 80 if (size < 4) 81 goto fail; 82 val = bytestream_get_le32(&data); 83 if (val <= 0 || val > INT_MAX) { 84 av_log(avctx, AV_LOG_ERROR, "Invalid channel count"); 85 ret = AVERROR_INVALIDDATA; 86 goto fail2; 87 } 88 avctx->channels = val; 89 size -= 4; 90 } 91 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { 92 if (size < 8) 93 goto fail; 94 avctx->channel_layout = bytestream_get_le64(&data); 95 size -= 8; 96 } 97FF_ENABLE_DEPRECATION_WARNINGS 98#endif 99 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { 100 if (size < 4) 101 goto fail; 102 val = bytestream_get_le32(&data); 103 if (val <= 0 || val > INT_MAX) { 104 av_log(avctx, AV_LOG_ERROR, "Invalid sample rate"); 105 ret = AVERROR_INVALIDDATA; 106 goto fail2; 107 } 108 avctx->sample_rate = val; 109 size -= 4; 110 } 111 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { 112 if (size < 8) 113 goto fail; 114 avctx->width = bytestream_get_le32(&data); 115 avctx->height = bytestream_get_le32(&data); 116 size -= 8; 117 ret = ff_set_dimensions(avctx, avctx->width, avctx->height); 118 if (ret < 0) 119 goto fail2; 120 } 121 122 return 0; 123fail: 124 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n"); 125 ret = AVERROR_INVALIDDATA; 126fail2: 127 if (ret < 0) { 128 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n"); 129 if (avctx->err_recognition & AV_EF_EXPLODE) 130 return ret; 131 } 132 return 0; 133} 134 135#define IS_EMPTY(pkt) (!(pkt)->data) 136 137static int copy_packet_props(AVPacket *dst, const AVPacket *src) 138{ 139 int ret = av_packet_copy_props(dst, src); 140 if (ret < 0) 141 return ret; 142 143 dst->size = src->size; // HACK: Needed for ff_decode_frame_props(). 144 dst->data = (void*)1; // HACK: Needed for IS_EMPTY(). 145 146 return 0; 147} 148 149static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt) 150{ 151 AVPacket tmp = { 0 }; 152 int ret = 0; 153 154 if (IS_EMPTY(avci->last_pkt_props)) { 155 if (av_fifo_read(avci->pkt_props, avci->last_pkt_props, 1) < 0) 156 return copy_packet_props(avci->last_pkt_props, pkt); 157 } 158 159 ret = copy_packet_props(&tmp, pkt); 160 if (ret < 0) 161 return ret; 162 163 ret = av_fifo_write(avci->pkt_props, &tmp, 1); 164 if (ret < 0) 165 av_packet_unref(&tmp); 166 167 return ret; 168} 169 170static int decode_bsfs_init(AVCodecContext *avctx) 171{ 172 AVCodecInternal *avci = avctx->internal; 173 const FFCodec *const codec = ffcodec(avctx->codec); 174 int ret; 175 176 if (avci->bsf) 177 return 0; 178 179 ret = av_bsf_list_parse_str(codec->bsfs, &avci->bsf); 180 if (ret < 0) { 181 av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", codec->bsfs, av_err2str(ret)); 182 if (ret != AVERROR(ENOMEM)) 183 ret = AVERROR_BUG; 184 goto fail; 185 } 186 187 /* We do not currently have an API for passing the input timebase into decoders, 188 * but no filters used here should actually need it. 189 * So we make up some plausible-looking number (the MPEG 90kHz timebase) */ 190 avci->bsf->time_base_in = (AVRational){ 1, 90000 }; 191 ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx); 192 if (ret < 0) 193 goto fail; 194 195 ret = av_bsf_init(avci->bsf); 196 if (ret < 0) 197 goto fail; 198 199 return 0; 200fail: 201 av_bsf_free(&avci->bsf); 202 return ret; 203} 204 205int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt) 206{ 207 AVCodecInternal *avci = avctx->internal; 208 int ret; 209 210 if (avci->draining) 211 return AVERROR_EOF; 212 213 ret = av_bsf_receive_packet(avci->bsf, pkt); 214 if (ret == AVERROR_EOF) 215 avci->draining = 1; 216 if (ret < 0) 217 return ret; 218 219 if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { 220 ret = extract_packet_props(avctx->internal, pkt); 221 if (ret < 0) 222 goto finish; 223 } 224 225 ret = apply_param_change(avctx, pkt); 226 if (ret < 0) 227 goto finish; 228 229 return 0; 230finish: 231 av_packet_unref(pkt); 232 return ret; 233} 234 235/** 236 * Attempt to guess proper monotonic timestamps for decoded video frames 237 * which might have incorrect times. Input timestamps may wrap around, in 238 * which case the output will as well. 239 * 240 * @param pts the pts field of the decoded AVPacket, as passed through 241 * AVFrame.pts 242 * @param dts the dts field of the decoded AVPacket 243 * @return one of the input values, may be AV_NOPTS_VALUE 244 */ 245static int64_t guess_correct_pts(AVCodecContext *ctx, 246 int64_t reordered_pts, int64_t dts) 247{ 248 int64_t pts = AV_NOPTS_VALUE; 249 250 if (dts != AV_NOPTS_VALUE) { 251 ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts; 252 ctx->pts_correction_last_dts = dts; 253 } else if (reordered_pts != AV_NOPTS_VALUE) 254 ctx->pts_correction_last_dts = reordered_pts; 255 256 if (reordered_pts != AV_NOPTS_VALUE) { 257 ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts; 258 ctx->pts_correction_last_pts = reordered_pts; 259 } else if(dts != AV_NOPTS_VALUE) 260 ctx->pts_correction_last_pts = dts; 261 262 if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE) 263 && reordered_pts != AV_NOPTS_VALUE) 264 pts = reordered_pts; 265 else 266 pts = dts; 267 268 return pts; 269} 270 271/* 272 * The core of the receive_frame_wrapper for the decoders implementing 273 * the simple API. Certain decoders might consume partial packets without 274 * returning any output, so this function needs to be called in a loop until it 275 * returns EAGAIN. 276 **/ 277static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples) 278{ 279 AVCodecInternal *avci = avctx->internal; 280 AVPacket *const pkt = avci->in_pkt; 281 const FFCodec *const codec = ffcodec(avctx->codec); 282 int got_frame, actual_got_frame; 283 int ret; 284 285 if (!pkt->data && !avci->draining) { 286 av_packet_unref(pkt); 287 ret = ff_decode_get_packet(avctx, pkt); 288 if (ret < 0 && ret != AVERROR_EOF) 289 return ret; 290 } 291 292 // Some codecs (at least wma lossless) will crash when feeding drain packets 293 // after EOF was signaled. 294 if (avci->draining_done) 295 return AVERROR_EOF; 296 297 if (!pkt->data && 298 !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY || 299 avctx->active_thread_type & FF_THREAD_FRAME)) 300 return AVERROR_EOF; 301 302 got_frame = 0; 303 304 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) { 305 ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt); 306 } else { 307 ret = codec->cb.decode(avctx, frame, &got_frame, pkt); 308 309 if (!(codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS)) 310 frame->pkt_dts = pkt->dts; 311 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { 312 if(!avctx->has_b_frames) 313 frame->pkt_pos = pkt->pos; 314 //FIXME these should be under if(!avctx->has_b_frames) 315 /* get_buffer is supposed to set frame parameters */ 316 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) { 317 if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio; 318 if (!frame->width) frame->width = avctx->width; 319 if (!frame->height) frame->height = avctx->height; 320 if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt; 321 } 322 } 323 } 324 emms_c(); 325 actual_got_frame = got_frame; 326 327 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { 328 if (frame->flags & AV_FRAME_FLAG_DISCARD) 329 got_frame = 0; 330 } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { 331 uint8_t *side; 332 size_t side_size; 333 uint32_t discard_padding = 0; 334 uint8_t skip_reason = 0; 335 uint8_t discard_reason = 0; 336 337 if (ret >= 0 && got_frame) { 338 if (frame->format == AV_SAMPLE_FMT_NONE) 339 frame->format = avctx->sample_fmt; 340 if (!frame->ch_layout.nb_channels) { 341 int ret2 = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout); 342 if (ret2 < 0) { 343 ret = ret2; 344 got_frame = 0; 345 } 346 } 347#if FF_API_OLD_CHANNEL_LAYOUT 348FF_DISABLE_DEPRECATION_WARNINGS 349 if (!frame->channel_layout) 350 frame->channel_layout = avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? 351 avctx->ch_layout.u.mask : 0; 352 if (!frame->channels) 353 frame->channels = avctx->ch_layout.nb_channels; 354FF_ENABLE_DEPRECATION_WARNINGS 355#endif 356 if (!frame->sample_rate) 357 frame->sample_rate = avctx->sample_rate; 358 } 359 360 side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size); 361 if(side && side_size>=10) { 362 avci->skip_samples = AV_RL32(side) * avci->skip_samples_multiplier; 363 avci->skip_samples = FFMAX(0, avci->skip_samples); 364 discard_padding = AV_RL32(side + 4); 365 av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n", 366 avci->skip_samples, (int)discard_padding); 367 skip_reason = AV_RL8(side + 8); 368 discard_reason = AV_RL8(side + 9); 369 } 370 371 if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame && 372 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { 373 avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples); 374 got_frame = 0; 375 *discarded_samples += frame->nb_samples; 376 } 377 378 if (avci->skip_samples > 0 && got_frame && 379 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { 380 if(frame->nb_samples <= avci->skip_samples){ 381 got_frame = 0; 382 *discarded_samples += frame->nb_samples; 383 avci->skip_samples -= frame->nb_samples; 384 av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n", 385 avci->skip_samples); 386 } else { 387 av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples, 388 frame->nb_samples - avci->skip_samples, avctx->ch_layout.nb_channels, frame->format); 389 if(avctx->pkt_timebase.num && avctx->sample_rate) { 390 int64_t diff_ts = av_rescale_q(avci->skip_samples, 391 (AVRational){1, avctx->sample_rate}, 392 avctx->pkt_timebase); 393 if(frame->pts!=AV_NOPTS_VALUE) 394 frame->pts += diff_ts; 395 if(frame->pkt_dts!=AV_NOPTS_VALUE) 396 frame->pkt_dts += diff_ts; 397 if (frame->pkt_duration >= diff_ts) 398 frame->pkt_duration -= diff_ts; 399 } else { 400 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n"); 401 } 402 av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n", 403 avci->skip_samples, frame->nb_samples); 404 *discarded_samples += avci->skip_samples; 405 frame->nb_samples -= avci->skip_samples; 406 avci->skip_samples = 0; 407 } 408 } 409 410 if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame && 411 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { 412 if (discard_padding == frame->nb_samples) { 413 *discarded_samples += frame->nb_samples; 414 got_frame = 0; 415 } else { 416 if(avctx->pkt_timebase.num && avctx->sample_rate) { 417 int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding, 418 (AVRational){1, avctx->sample_rate}, 419 avctx->pkt_timebase); 420 frame->pkt_duration = diff_ts; 421 } else { 422 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n"); 423 } 424 av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n", 425 (int)discard_padding, frame->nb_samples); 426 frame->nb_samples -= discard_padding; 427 } 428 } 429 430 if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) { 431 AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10); 432 if (fside) { 433 AV_WL32(fside->data, avci->skip_samples); 434 AV_WL32(fside->data + 4, discard_padding); 435 AV_WL8(fside->data + 8, skip_reason); 436 AV_WL8(fside->data + 9, discard_reason); 437 avci->skip_samples = 0; 438 } 439 } 440 } 441 442 if (avctx->codec->type == AVMEDIA_TYPE_AUDIO && 443 !avci->showed_multi_packet_warning && 444 ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) { 445 av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n"); 446 avci->showed_multi_packet_warning = 1; 447 } 448 449 if (!got_frame) 450 av_frame_unref(frame); 451 452#if FF_API_FLAG_TRUNCATED 453 if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED)) 454#else 455 if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO) 456#endif 457 ret = pkt->size; 458 459#if FF_API_AVCTX_TIMEBASE 460 if (avctx->framerate.num > 0 && avctx->framerate.den > 0) 461 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1})); 462#endif 463 464 /* do not stop draining when actual_got_frame != 0 or ret < 0 */ 465 /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */ 466 if (avci->draining && !actual_got_frame) { 467 if (ret < 0) { 468 /* prevent infinite loop if a decoder wrongly always return error on draining */ 469 /* reasonable nb_errors_max = maximum b frames + thread count */ 470 int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ? 471 avctx->thread_count : 1); 472 473 if (avci->nb_draining_errors++ >= nb_errors_max) { 474 av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. " 475 "Stop draining and force EOF.\n"); 476 avci->draining_done = 1; 477 ret = AVERROR_BUG; 478 } 479 } else { 480 avci->draining_done = 1; 481 } 482 } 483 484 if (ret >= pkt->size || ret < 0) { 485 av_packet_unref(pkt); 486 av_packet_unref(avci->last_pkt_props); 487 } else { 488 int consumed = ret; 489 490 pkt->data += consumed; 491 pkt->size -= consumed; 492 pkt->pts = AV_NOPTS_VALUE; 493 pkt->dts = AV_NOPTS_VALUE; 494 if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { 495 avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment. 496 avci->last_pkt_props->pts = AV_NOPTS_VALUE; 497 avci->last_pkt_props->dts = AV_NOPTS_VALUE; 498 } 499 } 500 501 if (got_frame) 502 av_assert0(frame->buf[0]); 503 504 return ret < 0 ? ret : 0; 505} 506 507static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame) 508{ 509 int ret; 510 int64_t discarded_samples = 0; 511 512 while (!frame->buf[0]) { 513 if (discarded_samples > avctx->max_samples) 514 return AVERROR(EAGAIN); 515 ret = decode_simple_internal(avctx, frame, &discarded_samples); 516 if (ret < 0) 517 return ret; 518 } 519 520 return 0; 521} 522 523static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame) 524{ 525 AVCodecInternal *avci = avctx->internal; 526 const FFCodec *const codec = ffcodec(avctx->codec); 527 int ret; 528 529 av_assert0(!frame->buf[0]); 530 531 if (codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME) { 532 ret = codec->cb.receive_frame(avctx, frame); 533 if (ret != AVERROR(EAGAIN)) 534 av_packet_unref(avci->last_pkt_props); 535 } else 536 ret = decode_simple_receive_frame(avctx, frame); 537 538 if (ret == AVERROR_EOF) 539 avci->draining_done = 1; 540 541 if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS) && 542 IS_EMPTY(avci->last_pkt_props)) { 543 // May fail if the FIFO is empty. 544 av_fifo_read(avci->pkt_props, avci->last_pkt_props, 1); 545 } 546 547 if (!ret) { 548 frame->best_effort_timestamp = guess_correct_pts(avctx, 549 frame->pts, 550 frame->pkt_dts); 551 552 /* the only case where decode data is not set should be decoders 553 * that do not call ff_get_buffer() */ 554 av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) || 555 !(avctx->codec->capabilities & AV_CODEC_CAP_DR1)); 556 557 if (frame->private_ref) { 558 FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data; 559 560 if (fdd->post_process) { 561 ret = fdd->post_process(avctx, frame); 562 if (ret < 0) { 563 av_frame_unref(frame); 564 return ret; 565 } 566 } 567 } 568 } 569 570 /* free the per-frame decode data */ 571 av_buffer_unref(&frame->private_ref); 572 573 return ret; 574} 575 576int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt) 577{ 578 AVCodecInternal *avci = avctx->internal; 579 int ret; 580 581 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) 582 return AVERROR(EINVAL); 583 584 if (avctx->internal->draining) 585 return AVERROR_EOF; 586 587 if (avpkt && !avpkt->size && avpkt->data) 588 return AVERROR(EINVAL); 589 590 av_packet_unref(avci->buffer_pkt); 591 if (avpkt && (avpkt->data || avpkt->side_data_elems)) { 592 ret = av_packet_ref(avci->buffer_pkt, avpkt); 593 if (ret < 0) 594 return ret; 595 } 596 597 ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt); 598 if (ret < 0) { 599 av_packet_unref(avci->buffer_pkt); 600 return ret; 601 } 602 603 if (!avci->buffer_frame->buf[0]) { 604 ret = decode_receive_frame_internal(avctx, avci->buffer_frame); 605 if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) 606 return ret; 607 } 608 609 return 0; 610} 611 612static int apply_cropping(AVCodecContext *avctx, AVFrame *frame) 613{ 614 /* make sure we are noisy about decoders returning invalid cropping data */ 615 if (frame->crop_left >= INT_MAX - frame->crop_right || 616 frame->crop_top >= INT_MAX - frame->crop_bottom || 617 (frame->crop_left + frame->crop_right) >= frame->width || 618 (frame->crop_top + frame->crop_bottom) >= frame->height) { 619 av_log(avctx, AV_LOG_WARNING, 620 "Invalid cropping information set by a decoder: " 621 "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" " 622 "(frame size %dx%d). This is a bug, please report it\n", 623 frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom, 624 frame->width, frame->height); 625 frame->crop_left = 0; 626 frame->crop_right = 0; 627 frame->crop_top = 0; 628 frame->crop_bottom = 0; 629 return 0; 630 } 631 632 if (!avctx->apply_cropping) 633 return 0; 634 635 return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ? 636 AV_FRAME_CROP_UNALIGNED : 0); 637} 638 639int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame) 640{ 641 AVCodecInternal *avci = avctx->internal; 642 int ret, changed; 643 644 av_frame_unref(frame); 645 646 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) 647 return AVERROR(EINVAL); 648 649 if (avci->buffer_frame->buf[0]) { 650 av_frame_move_ref(frame, avci->buffer_frame); 651 } else { 652 ret = decode_receive_frame_internal(avctx, frame); 653 if (ret < 0) 654 return ret; 655 } 656 657 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { 658 ret = apply_cropping(avctx, frame); 659 if (ret < 0) { 660 av_frame_unref(frame); 661 return ret; 662 } 663 } 664 665 avctx->frame_number++; 666 667 if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) { 668 669 if (avctx->frame_number == 1) { 670 avci->initial_format = frame->format; 671 switch(avctx->codec_type) { 672 case AVMEDIA_TYPE_VIDEO: 673 avci->initial_width = frame->width; 674 avci->initial_height = frame->height; 675 break; 676 case AVMEDIA_TYPE_AUDIO: 677 avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate : 678 avctx->sample_rate; 679#if FF_API_OLD_CHANNEL_LAYOUT 680FF_DISABLE_DEPRECATION_WARNINGS 681 avci->initial_channels = frame->ch_layout.nb_channels; 682 avci->initial_channel_layout = frame->channel_layout; 683FF_ENABLE_DEPRECATION_WARNINGS 684#endif 685 ret = av_channel_layout_copy(&avci->initial_ch_layout, &frame->ch_layout); 686 if (ret < 0) { 687 av_frame_unref(frame); 688 return ret; 689 } 690 break; 691 } 692 } 693 694 if (avctx->frame_number > 1) { 695 changed = avci->initial_format != frame->format; 696 697 switch(avctx->codec_type) { 698 case AVMEDIA_TYPE_VIDEO: 699 changed |= avci->initial_width != frame->width || 700 avci->initial_height != frame->height; 701 break; 702 case AVMEDIA_TYPE_AUDIO: 703FF_DISABLE_DEPRECATION_WARNINGS 704 changed |= avci->initial_sample_rate != frame->sample_rate || 705 avci->initial_sample_rate != avctx->sample_rate || 706#if FF_API_OLD_CHANNEL_LAYOUT 707 avci->initial_channels != frame->channels || 708 avci->initial_channel_layout != frame->channel_layout || 709#endif 710 av_channel_layout_compare(&avci->initial_ch_layout, &frame->ch_layout); 711FF_ENABLE_DEPRECATION_WARNINGS 712 break; 713 } 714 715 if (changed) { 716 avci->changed_frames_dropped++; 717 av_log(avctx, AV_LOG_INFO, "dropped changed frame #%d pts %"PRId64 718 " drop count: %d \n", 719 avctx->frame_number, frame->pts, 720 avci->changed_frames_dropped); 721 av_frame_unref(frame); 722 return AVERROR_INPUT_CHANGED; 723 } 724 } 725 } 726 return 0; 727} 728 729static void get_subtitle_defaults(AVSubtitle *sub) 730{ 731 memset(sub, 0, sizeof(*sub)); 732 sub->pts = AV_NOPTS_VALUE; 733} 734 735#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */ 736static int recode_subtitle(AVCodecContext *avctx, AVPacket **outpkt, 737 AVPacket *inpkt, AVPacket *buf_pkt) 738{ 739#if CONFIG_ICONV 740 iconv_t cd = (iconv_t)-1; 741 int ret = 0; 742 char *inb, *outb; 743 size_t inl, outl; 744#endif 745 746 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) { 747 *outpkt = inpkt; 748 return 0; 749 } 750 751#if CONFIG_ICONV 752 inb = inpkt->data; 753 inl = inpkt->size; 754 755 if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) { 756 av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n"); 757 return AVERROR(ERANGE); 758 } 759 760 cd = iconv_open("UTF-8", avctx->sub_charenc); 761 av_assert0(cd != (iconv_t)-1); 762 763 ret = av_new_packet(buf_pkt, inl * UTF8_MAX_BYTES); 764 if (ret < 0) 765 goto end; 766 ret = av_packet_copy_props(buf_pkt, inpkt); 767 if (ret < 0) 768 goto end; 769 outb = buf_pkt->data; 770 outl = buf_pkt->size; 771 772 if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 || 773 iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 || 774 outl >= buf_pkt->size || inl != 0) { 775 ret = FFMIN(AVERROR(errno), -1); 776 av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" " 777 "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc); 778 goto end; 779 } 780 buf_pkt->size -= outl; 781 memset(buf_pkt->data + buf_pkt->size, 0, outl); 782 *outpkt = buf_pkt; 783 784 ret = 0; 785end: 786 if (ret < 0) 787 av_packet_unref(buf_pkt); 788 if (cd != (iconv_t)-1) 789 iconv_close(cd); 790 return ret; 791#else 792 av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv"); 793 return AVERROR(EINVAL); 794#endif 795} 796 797static int utf8_check(const uint8_t *str) 798{ 799 const uint8_t *byte; 800 uint32_t codepoint, min; 801 802 while (*str) { 803 byte = str; 804 GET_UTF8(codepoint, *(byte++), return 0;); 805 min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 : 806 1 << (5 * (byte - str) - 4); 807 if (codepoint < min || codepoint >= 0x110000 || 808 codepoint == 0xFFFE /* BOM */ || 809 codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */) 810 return 0; 811 str = byte; 812 } 813 return 1; 814} 815 816int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, 817 int *got_sub_ptr, 818 AVPacket *avpkt) 819{ 820 int ret = 0; 821 822 if (!avpkt->data && avpkt->size) { 823 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n"); 824 return AVERROR(EINVAL); 825 } 826 if (!avctx->codec) 827 return AVERROR(EINVAL); 828 if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) { 829 av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n"); 830 return AVERROR(EINVAL); 831 } 832 833 *got_sub_ptr = 0; 834 get_subtitle_defaults(sub); 835 836 if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) { 837 AVCodecInternal *avci = avctx->internal; 838 AVPacket *pkt; 839 840 ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt); 841 if (ret < 0) 842 return ret; 843 844 if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE) 845 sub->pts = av_rescale_q(avpkt->pts, 846 avctx->pkt_timebase, AV_TIME_BASE_Q); 847 ret = ffcodec(avctx->codec)->cb.decode_sub(avctx, sub, got_sub_ptr, pkt); 848 if (pkt == avci->buffer_pkt) // did we recode? 849 av_packet_unref(avci->buffer_pkt); 850 if (ret < 0) { 851 *got_sub_ptr = 0; 852 avsubtitle_free(sub); 853 return ret; 854 } 855 av_assert1(!sub->num_rects || *got_sub_ptr); 856 857 if (sub->num_rects && !sub->end_display_time && avpkt->duration && 858 avctx->pkt_timebase.num) { 859 AVRational ms = { 1, 1000 }; 860 sub->end_display_time = av_rescale_q(avpkt->duration, 861 avctx->pkt_timebase, ms); 862 } 863 864 if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) 865 sub->format = 0; 866 else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB) 867 sub->format = 1; 868 869 for (unsigned i = 0; i < sub->num_rects; i++) { 870 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE && 871 sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) { 872 av_log(avctx, AV_LOG_ERROR, 873 "Invalid UTF-8 in decoded subtitles text; " 874 "maybe missing -sub_charenc option\n"); 875 avsubtitle_free(sub); 876 *got_sub_ptr = 0; 877 return AVERROR_INVALIDDATA; 878 } 879 } 880 881 if (*got_sub_ptr) 882 avctx->frame_number++; 883 } 884 885 return ret; 886} 887 888enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx, 889 const enum AVPixelFormat *fmt) 890{ 891 const AVPixFmtDescriptor *desc; 892 const AVCodecHWConfig *config; 893 int i, n; 894 895 // If a device was supplied when the codec was opened, assume that the 896 // user wants to use it. 897 if (avctx->hw_device_ctx && ffcodec(avctx->codec)->hw_configs) { 898 AVHWDeviceContext *device_ctx = 899 (AVHWDeviceContext*)avctx->hw_device_ctx->data; 900 for (i = 0;; i++) { 901 config = &ffcodec(avctx->codec)->hw_configs[i]->public; 902 if (!config) 903 break; 904 if (!(config->methods & 905 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)) 906 continue; 907 if (device_ctx->type != config->device_type) 908 continue; 909 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { 910 if (config->pix_fmt == fmt[n]) 911 return fmt[n]; 912 } 913 } 914 } 915 // No device or other setup, so we have to choose from things which 916 // don't any other external information. 917 918 // If the last element of the list is a software format, choose it 919 // (this should be best software format if any exist). 920 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); 921 desc = av_pix_fmt_desc_get(fmt[n - 1]); 922 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) 923 return fmt[n - 1]; 924 925 // Finally, traverse the list in order and choose the first entry 926 // with no external dependencies (if there is no hardware configuration 927 // information available then this just picks the first entry). 928 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { 929 for (i = 0;; i++) { 930 config = avcodec_get_hw_config(avctx->codec, i); 931 if (!config) 932 break; 933 if (config->pix_fmt == fmt[n]) 934 break; 935 } 936 if (!config) { 937 // No specific config available, so the decoder must be able 938 // to handle this format without any additional setup. 939 return fmt[n]; 940 } 941 if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { 942 // Usable with only internal setup. 943 return fmt[n]; 944 } 945 } 946 947 // Nothing is usable, give up. 948 return AV_PIX_FMT_NONE; 949} 950 951int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx, 952 enum AVHWDeviceType dev_type) 953{ 954 AVHWDeviceContext *device_ctx; 955 AVHWFramesContext *frames_ctx; 956 int ret; 957 958 if (!avctx->hwaccel) 959 return AVERROR(ENOSYS); 960 961 if (avctx->hw_frames_ctx) 962 return 0; 963 if (!avctx->hw_device_ctx) { 964 av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is " 965 "required for hardware accelerated decoding.\n"); 966 return AVERROR(EINVAL); 967 } 968 969 device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data; 970 if (device_ctx->type != dev_type) { 971 av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware " 972 "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type), 973 av_hwdevice_get_type_name(device_ctx->type)); 974 return AVERROR(EINVAL); 975 } 976 977 ret = avcodec_get_hw_frames_parameters(avctx, 978 avctx->hw_device_ctx, 979 avctx->hwaccel->pix_fmt, 980 &avctx->hw_frames_ctx); 981 if (ret < 0) 982 return ret; 983 984 frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data; 985 986 987 if (frames_ctx->initial_pool_size) { 988 // We guarantee 4 base work surfaces. The function above guarantees 1 989 // (the absolute minimum), so add the missing count. 990 frames_ctx->initial_pool_size += 3; 991 } 992 993 ret = av_hwframe_ctx_init(avctx->hw_frames_ctx); 994 if (ret < 0) { 995 av_buffer_unref(&avctx->hw_frames_ctx); 996 return ret; 997 } 998 999 return 0; 1000} 1001 1002int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, 1003 AVBufferRef *device_ref, 1004 enum AVPixelFormat hw_pix_fmt, 1005 AVBufferRef **out_frames_ref) 1006{ 1007 AVBufferRef *frames_ref = NULL; 1008 const AVCodecHWConfigInternal *hw_config; 1009 const AVHWAccel *hwa; 1010 int i, ret; 1011 1012 for (i = 0;; i++) { 1013 hw_config = ffcodec(avctx->codec)->hw_configs[i]; 1014 if (!hw_config) 1015 return AVERROR(ENOENT); 1016 if (hw_config->public.pix_fmt == hw_pix_fmt) 1017 break; 1018 } 1019 1020 hwa = hw_config->hwaccel; 1021 if (!hwa || !hwa->frame_params) 1022 return AVERROR(ENOENT); 1023 1024 frames_ref = av_hwframe_ctx_alloc(device_ref); 1025 if (!frames_ref) 1026 return AVERROR(ENOMEM); 1027 1028 ret = hwa->frame_params(avctx, frames_ref); 1029 if (ret >= 0) { 1030 AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data; 1031 1032 if (frames_ctx->initial_pool_size) { 1033 // If the user has requested that extra output surfaces be 1034 // available then add them here. 1035 if (avctx->extra_hw_frames > 0) 1036 frames_ctx->initial_pool_size += avctx->extra_hw_frames; 1037 1038 // If frame threading is enabled then an extra surface per thread 1039 // is also required. 1040 if (avctx->active_thread_type & FF_THREAD_FRAME) 1041 frames_ctx->initial_pool_size += avctx->thread_count; 1042 } 1043 1044 *out_frames_ref = frames_ref; 1045 } else { 1046 av_buffer_unref(&frames_ref); 1047 } 1048 return ret; 1049} 1050 1051static int hwaccel_init(AVCodecContext *avctx, 1052 const AVCodecHWConfigInternal *hw_config) 1053{ 1054 const AVHWAccel *hwaccel; 1055 int err; 1056 1057 hwaccel = hw_config->hwaccel; 1058 if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL && 1059 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { 1060 av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n", 1061 hwaccel->name); 1062 return AVERROR_PATCHWELCOME; 1063 } 1064 1065 if (hwaccel->priv_data_size) { 1066 avctx->internal->hwaccel_priv_data = 1067 av_mallocz(hwaccel->priv_data_size); 1068 if (!avctx->internal->hwaccel_priv_data) 1069 return AVERROR(ENOMEM); 1070 } 1071 1072 avctx->hwaccel = hwaccel; 1073 if (hwaccel->init) { 1074 err = hwaccel->init(avctx); 1075 if (err < 0) { 1076 av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: " 1077 "hwaccel initialisation returned error.\n", 1078 av_get_pix_fmt_name(hw_config->public.pix_fmt)); 1079 av_freep(&avctx->internal->hwaccel_priv_data); 1080 avctx->hwaccel = NULL; 1081 return err; 1082 } 1083 } 1084 1085 return 0; 1086} 1087 1088static void hwaccel_uninit(AVCodecContext *avctx) 1089{ 1090 if (avctx->hwaccel && avctx->hwaccel->uninit) 1091 avctx->hwaccel->uninit(avctx); 1092 1093 av_freep(&avctx->internal->hwaccel_priv_data); 1094 1095 avctx->hwaccel = NULL; 1096 1097 av_buffer_unref(&avctx->hw_frames_ctx); 1098} 1099 1100int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt) 1101{ 1102 const AVPixFmtDescriptor *desc; 1103 enum AVPixelFormat *choices; 1104 enum AVPixelFormat ret, user_choice; 1105 const AVCodecHWConfigInternal *hw_config; 1106 const AVCodecHWConfig *config; 1107 int i, n, err; 1108 1109 // Find end of list. 1110 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); 1111 // Must contain at least one entry. 1112 av_assert0(n >= 1); 1113 // If a software format is available, it must be the last entry. 1114 desc = av_pix_fmt_desc_get(fmt[n - 1]); 1115 if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) { 1116 // No software format is available. 1117 } else { 1118 avctx->sw_pix_fmt = fmt[n - 1]; 1119 } 1120 1121 choices = av_memdup(fmt, (n + 1) * sizeof(*choices)); 1122 if (!choices) 1123 return AV_PIX_FMT_NONE; 1124 1125 for (;;) { 1126 // Remove the previous hwaccel, if there was one. 1127 hwaccel_uninit(avctx); 1128 1129 user_choice = avctx->get_format(avctx, choices); 1130 if (user_choice == AV_PIX_FMT_NONE) { 1131 // Explicitly chose nothing, give up. 1132 ret = AV_PIX_FMT_NONE; 1133 break; 1134 } 1135 1136 desc = av_pix_fmt_desc_get(user_choice); 1137 if (!desc) { 1138 av_log(avctx, AV_LOG_ERROR, "Invalid format returned by " 1139 "get_format() callback.\n"); 1140 ret = AV_PIX_FMT_NONE; 1141 break; 1142 } 1143 av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n", 1144 desc->name); 1145 1146 for (i = 0; i < n; i++) { 1147 if (choices[i] == user_choice) 1148 break; 1149 } 1150 if (i == n) { 1151 av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): " 1152 "%s not in possible list.\n", desc->name); 1153 ret = AV_PIX_FMT_NONE; 1154 break; 1155 } 1156 1157 if (ffcodec(avctx->codec)->hw_configs) { 1158 for (i = 0;; i++) { 1159 hw_config = ffcodec(avctx->codec)->hw_configs[i]; 1160 if (!hw_config) 1161 break; 1162 if (hw_config->public.pix_fmt == user_choice) 1163 break; 1164 } 1165 } else { 1166 hw_config = NULL; 1167 } 1168 1169 if (!hw_config) { 1170 // No config available, so no extra setup required. 1171 ret = user_choice; 1172 break; 1173 } 1174 config = &hw_config->public; 1175 1176 if (config->methods & 1177 AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX && 1178 avctx->hw_frames_ctx) { 1179 const AVHWFramesContext *frames_ctx = 1180 (AVHWFramesContext*)avctx->hw_frames_ctx->data; 1181 if (frames_ctx->format != user_choice) { 1182 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " 1183 "does not match the format of the provided frames " 1184 "context.\n", desc->name); 1185 goto try_again; 1186 } 1187 } else if (config->methods & 1188 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && 1189 avctx->hw_device_ctx) { 1190 const AVHWDeviceContext *device_ctx = 1191 (AVHWDeviceContext*)avctx->hw_device_ctx->data; 1192 if (device_ctx->type != config->device_type) { 1193 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " 1194 "does not match the type of the provided device " 1195 "context.\n", desc->name); 1196 goto try_again; 1197 } 1198 } else if (config->methods & 1199 AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { 1200 // Internal-only setup, no additional configuration. 1201 } else if (config->methods & 1202 AV_CODEC_HW_CONFIG_METHOD_AD_HOC) { 1203 // Some ad-hoc configuration we can't see and can't check. 1204 } else { 1205 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " 1206 "missing configuration.\n", desc->name); 1207 goto try_again; 1208 } 1209 if (hw_config->hwaccel) { 1210 av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel " 1211 "initialisation.\n", desc->name); 1212 err = hwaccel_init(avctx, hw_config); 1213 if (err < 0) 1214 goto try_again; 1215 } 1216 ret = user_choice; 1217 break; 1218 1219 try_again: 1220 av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying " 1221 "get_format() without it.\n", desc->name); 1222 for (i = 0; i < n; i++) { 1223 if (choices[i] == user_choice) 1224 break; 1225 } 1226 for (; i + 1 < n; i++) 1227 choices[i] = choices[i + 1]; 1228 --n; 1229 } 1230 1231 av_freep(&choices); 1232 return ret; 1233} 1234 1235static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame) 1236{ 1237 size_t size; 1238 const uint8_t *side_metadata; 1239 1240 AVDictionary **frame_md = &frame->metadata; 1241 1242 side_metadata = av_packet_get_side_data(avpkt, 1243 AV_PKT_DATA_STRINGS_METADATA, &size); 1244 return av_packet_unpack_dictionary(side_metadata, size, frame_md); 1245} 1246 1247int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame) 1248{ 1249 AVPacket *pkt = avctx->internal->last_pkt_props; 1250 static const struct { 1251 enum AVPacketSideDataType packet; 1252 enum AVFrameSideDataType frame; 1253 } sd[] = { 1254 { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN }, 1255 { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX }, 1256 { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL }, 1257 { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D }, 1258 { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE }, 1259 { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA }, 1260 { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL }, 1261 { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC }, 1262 { AV_PKT_DATA_ICC_PROFILE, AV_FRAME_DATA_ICC_PROFILE }, 1263 { AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE }, 1264 { AV_PKT_DATA_DYNAMIC_HDR10_PLUS, AV_FRAME_DATA_DYNAMIC_HDR_PLUS }, 1265 }; 1266 1267 if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { 1268 frame->pts = pkt->pts; 1269 frame->pkt_pos = pkt->pos; 1270 frame->pkt_duration = pkt->duration; 1271 frame->pkt_size = pkt->size; 1272 1273 for (int i = 0; i < FF_ARRAY_ELEMS(sd); i++) { 1274 size_t size; 1275 uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size); 1276 if (packet_sd) { 1277 AVFrameSideData *frame_sd = av_frame_new_side_data(frame, 1278 sd[i].frame, 1279 size); 1280 if (!frame_sd) 1281 return AVERROR(ENOMEM); 1282 1283 memcpy(frame_sd->data, packet_sd, size); 1284 } 1285 } 1286 add_metadata_from_side_data(pkt, frame); 1287 1288 if (pkt->flags & AV_PKT_FLAG_DISCARD) { 1289 frame->flags |= AV_FRAME_FLAG_DISCARD; 1290 } else { 1291 frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD); 1292 } 1293 } 1294 frame->reordered_opaque = avctx->reordered_opaque; 1295 1296 if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED) 1297 frame->color_primaries = avctx->color_primaries; 1298 if (frame->color_trc == AVCOL_TRC_UNSPECIFIED) 1299 frame->color_trc = avctx->color_trc; 1300 if (frame->colorspace == AVCOL_SPC_UNSPECIFIED) 1301 frame->colorspace = avctx->colorspace; 1302 if (frame->color_range == AVCOL_RANGE_UNSPECIFIED) 1303 frame->color_range = avctx->color_range; 1304 if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED) 1305 frame->chroma_location = avctx->chroma_sample_location; 1306 1307 switch (avctx->codec->type) { 1308 case AVMEDIA_TYPE_VIDEO: 1309 frame->format = avctx->pix_fmt; 1310 if (!frame->sample_aspect_ratio.num) 1311 frame->sample_aspect_ratio = avctx->sample_aspect_ratio; 1312 1313 if (frame->width && frame->height && 1314 av_image_check_sar(frame->width, frame->height, 1315 frame->sample_aspect_ratio) < 0) { 1316 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n", 1317 frame->sample_aspect_ratio.num, 1318 frame->sample_aspect_ratio.den); 1319 frame->sample_aspect_ratio = (AVRational){ 0, 1 }; 1320 } 1321 1322 break; 1323 case AVMEDIA_TYPE_AUDIO: 1324 if (!frame->sample_rate) 1325 frame->sample_rate = avctx->sample_rate; 1326 if (frame->format < 0) 1327 frame->format = avctx->sample_fmt; 1328 if (!frame->ch_layout.nb_channels) { 1329 int ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout); 1330 if (ret < 0) 1331 return ret; 1332 } 1333#if FF_API_OLD_CHANNEL_LAYOUT 1334FF_DISABLE_DEPRECATION_WARNINGS 1335 frame->channels = frame->ch_layout.nb_channels; 1336 frame->channel_layout = frame->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? 1337 frame->ch_layout.u.mask : 0; 1338FF_ENABLE_DEPRECATION_WARNINGS 1339#endif 1340 break; 1341 } 1342 return 0; 1343} 1344 1345static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame) 1346{ 1347 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { 1348 int i; 1349 int num_planes = av_pix_fmt_count_planes(frame->format); 1350 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); 1351 int flags = desc ? desc->flags : 0; 1352 if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL)) 1353 num_planes = 2; 1354 for (i = 0; i < num_planes; i++) { 1355 av_assert0(frame->data[i]); 1356 } 1357 // For formats without data like hwaccel allow unused pointers to be non-NULL. 1358 for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) { 1359 if (frame->data[i]) 1360 av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n"); 1361 frame->data[i] = NULL; 1362 } 1363 } 1364} 1365 1366static void decode_data_free(void *opaque, uint8_t *data) 1367{ 1368 FrameDecodeData *fdd = (FrameDecodeData*)data; 1369 1370 if (fdd->post_process_opaque_free) 1371 fdd->post_process_opaque_free(fdd->post_process_opaque); 1372 1373 if (fdd->hwaccel_priv_free) 1374 fdd->hwaccel_priv_free(fdd->hwaccel_priv); 1375 1376 av_freep(&fdd); 1377} 1378 1379int ff_attach_decode_data(AVFrame *frame) 1380{ 1381 AVBufferRef *fdd_buf; 1382 FrameDecodeData *fdd; 1383 1384 av_assert1(!frame->private_ref); 1385 av_buffer_unref(&frame->private_ref); 1386 1387 fdd = av_mallocz(sizeof(*fdd)); 1388 if (!fdd) 1389 return AVERROR(ENOMEM); 1390 1391 fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free, 1392 NULL, AV_BUFFER_FLAG_READONLY); 1393 if (!fdd_buf) { 1394 av_freep(&fdd); 1395 return AVERROR(ENOMEM); 1396 } 1397 1398 frame->private_ref = fdd_buf; 1399 1400 return 0; 1401} 1402 1403int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) 1404{ 1405 const AVHWAccel *hwaccel = avctx->hwaccel; 1406 int override_dimensions = 1; 1407 int ret; 1408 1409 av_assert0(av_codec_is_decoder(avctx->codec)); 1410 1411 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { 1412 if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN || 1413 (ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) { 1414 av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n"); 1415 ret = AVERROR(EINVAL); 1416 goto fail; 1417 } 1418 1419 if (frame->width <= 0 || frame->height <= 0) { 1420 frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres)); 1421 frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres)); 1422 override_dimensions = 0; 1423 } 1424 1425 if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) { 1426 av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n"); 1427 ret = AVERROR(EINVAL); 1428 goto fail; 1429 } 1430 } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) { 1431#if FF_API_OLD_CHANNEL_LAYOUT 1432FF_DISABLE_DEPRECATION_WARNINGS 1433 /* compat layer for old-style get_buffer() implementations */ 1434 avctx->channels = avctx->ch_layout.nb_channels; 1435 avctx->channel_layout = (avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) ? 1436 avctx->ch_layout.u.mask : 0; 1437FF_ENABLE_DEPRECATION_WARNINGS 1438#endif 1439 1440 if (frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels > avctx->max_samples) { 1441 av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples); 1442 ret = AVERROR(EINVAL); 1443 goto fail; 1444 } 1445 } 1446 ret = ff_decode_frame_props(avctx, frame); 1447 if (ret < 0) 1448 goto fail; 1449 1450 if (hwaccel) { 1451 if (hwaccel->alloc_frame) { 1452 ret = hwaccel->alloc_frame(avctx, frame); 1453 goto end; 1454 } 1455 } else 1456 avctx->sw_pix_fmt = avctx->pix_fmt; 1457 1458 ret = avctx->get_buffer2(avctx, frame, flags); 1459 if (ret < 0) 1460 goto fail; 1461 1462 validate_avframe_allocation(avctx, frame); 1463 1464 ret = ff_attach_decode_data(frame); 1465 if (ret < 0) 1466 goto fail; 1467 1468end: 1469 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions && 1470 !(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) { 1471 frame->width = avctx->width; 1472 frame->height = avctx->height; 1473 } 1474 1475fail: 1476 if (ret < 0) { 1477 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 1478 av_frame_unref(frame); 1479 } 1480 1481 return ret; 1482} 1483 1484static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags) 1485{ 1486 AVFrame *tmp; 1487 int ret; 1488 1489 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO); 1490 1491 if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) { 1492 av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n", 1493 frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); 1494 av_frame_unref(frame); 1495 } 1496 1497 if (!frame->data[0]) 1498 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); 1499 1500 if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || av_frame_is_writable(frame)) 1501 return ff_decode_frame_props(avctx, frame); 1502 1503 tmp = av_frame_alloc(); 1504 if (!tmp) 1505 return AVERROR(ENOMEM); 1506 1507 av_frame_move_ref(tmp, frame); 1508 1509 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); 1510 if (ret < 0) { 1511 av_frame_free(&tmp); 1512 return ret; 1513 } 1514 1515 av_frame_copy(frame, tmp); 1516 av_frame_free(&tmp); 1517 1518 return 0; 1519} 1520 1521int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) 1522{ 1523 int ret = reget_buffer_internal(avctx, frame, flags); 1524 if (ret < 0) 1525 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); 1526 return ret; 1527} 1528 1529int ff_decode_preinit(AVCodecContext *avctx) 1530{ 1531 AVCodecInternal *avci = avctx->internal; 1532 int ret = 0; 1533 1534 /* if the decoder init function was already called previously, 1535 * free the already allocated subtitle_header before overwriting it */ 1536 av_freep(&avctx->subtitle_header); 1537 1538#if FF_API_THREAD_SAFE_CALLBACKS 1539FF_DISABLE_DEPRECATION_WARNINGS 1540 if ((avctx->thread_type & FF_THREAD_FRAME) && 1541 avctx->get_buffer2 != avcodec_default_get_buffer2 && 1542 !avctx->thread_safe_callbacks) { 1543 av_log(avctx, AV_LOG_WARNING, "Requested frame threading with a " 1544 "custom get_buffer2() implementation which is not marked as " 1545 "thread safe. This is not supported anymore, make your " 1546 "callback thread-safe.\n"); 1547 } 1548FF_ENABLE_DEPRECATION_WARNINGS 1549#endif 1550 1551 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && avctx->ch_layout.nb_channels == 0 && 1552 !(avctx->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)) { 1553 av_log(avctx, AV_LOG_ERROR, "Decoder requires channel count but channels not set\n"); 1554 return AVERROR(EINVAL); 1555 } 1556 if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) { 1557 av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n", 1558 avctx->codec->max_lowres); 1559 avctx->lowres = avctx->codec->max_lowres; 1560 } 1561 if (avctx->sub_charenc) { 1562 if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) { 1563 av_log(avctx, AV_LOG_ERROR, "Character encoding is only " 1564 "supported with subtitles codecs\n"); 1565 return AVERROR(EINVAL); 1566 } else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) { 1567 av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, " 1568 "subtitles character encoding will be ignored\n", 1569 avctx->codec_descriptor->name); 1570 avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING; 1571 } else { 1572 /* input character encoding is set for a text based subtitle 1573 * codec at this point */ 1574 if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC) 1575 avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER; 1576 1577 if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) { 1578#if CONFIG_ICONV 1579 iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc); 1580 if (cd == (iconv_t)-1) { 1581 ret = AVERROR(errno); 1582 av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context " 1583 "with input character encoding \"%s\"\n", avctx->sub_charenc); 1584 return ret; 1585 } 1586 iconv_close(cd); 1587#else 1588 av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles " 1589 "conversion needs a libavcodec built with iconv support " 1590 "for this codec\n"); 1591 return AVERROR(ENOSYS); 1592#endif 1593 } 1594 } 1595 } 1596 1597 avctx->pts_correction_num_faulty_pts = 1598 avctx->pts_correction_num_faulty_dts = 0; 1599 avctx->pts_correction_last_pts = 1600 avctx->pts_correction_last_dts = INT64_MIN; 1601 1602 if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY 1603 && avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO) 1604 av_log(avctx, AV_LOG_WARNING, 1605 "gray decoding requested but not enabled at configuration time\n"); 1606 if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) { 1607 avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS; 1608 } 1609 1610 avci->in_pkt = av_packet_alloc(); 1611 avci->last_pkt_props = av_packet_alloc(); 1612 avci->pkt_props = av_fifo_alloc2(1, sizeof(*avci->last_pkt_props), 1613 AV_FIFO_FLAG_AUTO_GROW); 1614 if (!avci->in_pkt || !avci->last_pkt_props || !avci->pkt_props) 1615 return AVERROR(ENOMEM); 1616 1617 ret = decode_bsfs_init(avctx); 1618 if (ret < 0) 1619 return ret; 1620 1621 return 0; 1622} 1623 1624int ff_copy_palette(void *dst, const AVPacket *src, void *logctx) 1625{ 1626 size_t size; 1627 const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size); 1628 1629 if (pal && size == AVPALETTE_SIZE) { 1630 memcpy(dst, pal, AVPALETTE_SIZE); 1631 return 1; 1632 } else if (pal) { 1633 av_log(logctx, AV_LOG_ERROR, 1634 "Palette size %"SIZE_SPECIFIER" is wrong\n", size); 1635 } 1636 return 0; 1637} 1638