1/* 2 * Copyright (c) 2008 Vitor Sessak 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/** 22 * @file 23 * memory buffer source filter 24 */ 25 26#include <float.h> 27 28#include "libavutil/channel_layout.h" 29#include "libavutil/common.h" 30#include "libavutil/fifo.h" 31#include "libavutil/frame.h" 32#include "libavutil/imgutils.h" 33#include "libavutil/internal.h" 34#include "libavutil/opt.h" 35#include "libavutil/samplefmt.h" 36#include "audio.h" 37#include "avfilter.h" 38#include "buffersrc.h" 39#include "formats.h" 40#include "internal.h" 41#include "video.h" 42#include "avcodec.h" 43 44typedef struct BufferSourceContext { 45 const AVClass *class; 46 AVFifoBuffer *fifo; 47 AVRational time_base; ///< time_base to set in the output link 48 AVRational frame_rate; ///< frame_rate to set in the output link 49 unsigned nb_failed_requests; 50 unsigned warning_limit; 51 52 /* video only */ 53 int w, h; 54 enum AVPixelFormat pix_fmt; 55 AVRational pixel_aspect; 56 char *sws_param; 57 58 /* audio only */ 59 int sample_rate; 60 enum AVSampleFormat sample_fmt; 61 int channels; 62 uint64_t channel_layout; 63 char *channel_layout_str; 64 65 int eof; 66} BufferSourceContext; 67 68#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\ 69 if (c->w != width || c->h != height || c->pix_fmt != format) {\ 70 av_log(s, AV_LOG_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\ 71 } 72 73#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format)\ 74 if (c->sample_fmt != format || c->sample_rate != srate ||\ 75 c->channel_layout != ch_layout || c->channels != ch_count) {\ 76 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\ 77 return AVERROR(EINVAL);\ 78 } 79 80int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame) 81{ 82 return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame, 83 AV_BUFFERSRC_FLAG_KEEP_REF); 84} 85 86int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame) 87{ 88 return av_buffersrc_add_frame_flags(ctx, frame, 0); 89} 90 91static int av_buffersrc_add_frame_internal(AVFilterContext *ctx, 92 AVFrame *frame, int flags); 93 94int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags) 95{ 96 AVFrame *copy = NULL; 97 int ret = 0; 98 99 if (frame && frame->channel_layout && 100 av_get_channel_layout_nb_channels(frame->channel_layout) != av_frame_get_channels(frame)) { 101 av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n"); 102 return AVERROR(EINVAL); 103 } 104 105 if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame) 106 return av_buffersrc_add_frame_internal(ctx, frame, flags); 107 108 if (!(copy = av_frame_alloc())) 109 return AVERROR(ENOMEM); 110 ret = av_frame_ref(copy, frame); 111 if (ret >= 0) 112 ret = av_buffersrc_add_frame_internal(ctx, copy, flags); 113 114 av_frame_free(©); 115 return ret; 116} 117 118static int av_buffersrc_add_frame_internal(AVFilterContext *ctx, 119 AVFrame *frame, int flags) 120{ 121 BufferSourceContext *s = ctx->priv; 122 AVFrame *copy; 123 int refcounted, ret; 124 125 s->nb_failed_requests = 0; 126 127 if (!frame) { 128 s->eof = 1; 129 return 0; 130 } else if (s->eof) 131 return AVERROR(EINVAL); 132 133 refcounted = !!frame->buf[0]; 134 135 if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) { 136 137 switch (ctx->outputs[0]->type) { 138 case AVMEDIA_TYPE_VIDEO: 139 CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height, 140 frame->format); 141 break; 142 case AVMEDIA_TYPE_AUDIO: 143 /* For layouts unknown on input but known on link after negotiation. */ 144 if (!frame->channel_layout) 145 frame->channel_layout = s->channel_layout; 146 CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout, 147 av_frame_get_channels(frame), frame->format); 148 break; 149 default: 150 return AVERROR(EINVAL); 151 } 152 153 } 154 155 if (!av_fifo_space(s->fifo) && 156 (ret = av_fifo_realloc2(s->fifo, av_fifo_size(s->fifo) + 157 sizeof(copy))) < 0) 158 return ret; 159 160 if (!(copy = av_frame_alloc())) 161 return AVERROR(ENOMEM); 162 163 if (refcounted) { 164 av_frame_move_ref(copy, frame); 165 } else { 166 ret = av_frame_ref(copy, frame); 167 if (ret < 0) { 168 av_frame_free(©); 169 return ret; 170 } 171 } 172 173 if ((ret = av_fifo_generic_write(s->fifo, ©, sizeof(copy), NULL)) < 0) { 174 if (refcounted) 175 av_frame_move_ref(frame, copy); 176 av_frame_free(©); 177 return ret; 178 } 179 180 if ((flags & AV_BUFFERSRC_FLAG_PUSH)) 181 if ((ret = ctx->output_pads[0].request_frame(ctx->outputs[0])) < 0) 182 return ret; 183 184 return 0; 185} 186 187#if FF_API_AVFILTERBUFFER 188FF_DISABLE_DEPRECATION_WARNINGS 189static void compat_free_buffer(void *opaque, uint8_t *data) 190{ 191 AVFilterBufferRef *buf = opaque; 192 AV_NOWARN_DEPRECATED( 193 avfilter_unref_buffer(buf); 194 ) 195} 196 197static void compat_unref_buffer(void *opaque, uint8_t *data) 198{ 199 AVBufferRef *buf = opaque; 200 AV_NOWARN_DEPRECATED( 201 av_buffer_unref(&buf); 202 ) 203} 204 205int av_buffersrc_add_ref(AVFilterContext *ctx, AVFilterBufferRef *buf, 206 int flags) 207{ 208 BufferSourceContext *s = ctx->priv; 209 AVFrame *frame = NULL; 210 AVBufferRef *dummy_buf = NULL; 211 int ret = 0, planes, i; 212 213 if (!buf) { 214 s->eof = 1; 215 return 0; 216 } else if (s->eof) 217 return AVERROR(EINVAL); 218 219 frame = av_frame_alloc(); 220 if (!frame) 221 return AVERROR(ENOMEM); 222 223 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, buf, 224 (buf->perms & AV_PERM_WRITE) ? 0 : AV_BUFFER_FLAG_READONLY); 225 if (!dummy_buf) { 226 ret = AVERROR(ENOMEM); 227 goto fail; 228 } 229 230 AV_NOWARN_DEPRECATED( 231 if ((ret = avfilter_copy_buf_props(frame, buf)) < 0) 232 goto fail; 233 ) 234 235#define WRAP_PLANE(ref_out, data, data_size) \ 236do { \ 237 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \ 238 if (!dummy_ref) { \ 239 ret = AVERROR(ENOMEM); \ 240 goto fail; \ 241 } \ 242 ref_out = av_buffer_create(data, data_size, compat_unref_buffer, \ 243 dummy_ref, (buf->perms & AV_PERM_WRITE) ? 0 : AV_BUFFER_FLAG_READONLY); \ 244 if (!ref_out) { \ 245 av_frame_unref(frame); \ 246 ret = AVERROR(ENOMEM); \ 247 goto fail; \ 248 } \ 249} while (0) 250 251 if (ctx->outputs[0]->type == AVMEDIA_TYPE_VIDEO) { 252 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); 253 254 planes = av_pix_fmt_count_planes(frame->format); 255 if (!desc || planes <= 0) { 256 ret = AVERROR(EINVAL); 257 goto fail; 258 } 259 260 for (i = 0; i < planes; i++) { 261 int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; 262 int plane_size = (frame->height >> v_shift) * frame->linesize[i]; 263 264 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size); 265 } 266 } else { 267 int planar = av_sample_fmt_is_planar(frame->format); 268 int channels = av_get_channel_layout_nb_channels(frame->channel_layout); 269 270 planes = planar ? channels : 1; 271 272 if (planes > FF_ARRAY_ELEMS(frame->buf)) { 273 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf); 274 frame->extended_buf = av_mallocz_array(sizeof(*frame->extended_buf), 275 frame->nb_extended_buf); 276 if (!frame->extended_buf) { 277 ret = AVERROR(ENOMEM); 278 goto fail; 279 } 280 } 281 282 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++) 283 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]); 284 285 for (i = 0; i < planes - FF_ARRAY_ELEMS(frame->buf); i++) 286 WRAP_PLANE(frame->extended_buf[i], 287 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)], 288 frame->linesize[0]); 289 } 290 291 ret = av_buffersrc_add_frame_flags(ctx, frame, flags); 292 293fail: 294 av_buffer_unref(&dummy_buf); 295 av_frame_free(&frame); 296 297 return ret; 298} 299FF_ENABLE_DEPRECATION_WARNINGS 300 301int av_buffersrc_buffer(AVFilterContext *ctx, AVFilterBufferRef *buf) 302{ 303 return av_buffersrc_add_ref(ctx, buf, 0); 304} 305#endif 306 307static av_cold int init_video(AVFilterContext *ctx) 308{ 309 BufferSourceContext *c = ctx->priv; 310 311 if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h || av_q2d(c->time_base) <= 0) { 312 av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n"); 313 return AVERROR(EINVAL); 314 } 315 316 if (!(c->fifo = av_fifo_alloc(sizeof(AVFrame*)))) 317 return AVERROR(ENOMEM); 318 319 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d sws_param:%s\n", 320 c->w, c->h, av_get_pix_fmt_name(c->pix_fmt), 321 c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den, 322 c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, "")); 323 c->warning_limit = 100; 324 return 0; 325} 326 327unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src) 328{ 329 return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests; 330} 331 332#define OFFSET(x) offsetof(BufferSourceContext, x) 333#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM 334#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 335 336static const AVOption buffer_options[] = { 337 { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V }, 338 { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V }, 339 { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V }, 340 { "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, .min = AV_PIX_FMT_NONE, .max = INT_MAX, .flags = V }, 341#if FF_API_OLD_FILTER_OPTS 342 /* those 4 are for compatibility with the old option passing system where each filter 343 * did its own parsing */ 344 { "time_base_num", "deprecated, do not use", OFFSET(time_base.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V }, 345 { "time_base_den", "deprecated, do not use", OFFSET(time_base.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V }, 346 { "sar_num", "deprecated, do not use", OFFSET(pixel_aspect.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V }, 347 { "sar_den", "deprecated, do not use", OFFSET(pixel_aspect.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V }, 348#endif 349 { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V }, 350 { "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V }, 351 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V }, 352 { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V }, 353 { "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = V }, 354 { NULL }, 355}; 356 357AVFILTER_DEFINE_CLASS(buffer); 358 359static const AVOption abuffer_options[] = { 360 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A }, 361 { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A }, 362 { "sample_fmt", NULL, OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, { .i64 = AV_SAMPLE_FMT_NONE }, .min = AV_SAMPLE_FMT_NONE, .max = INT_MAX, .flags = A }, 363 { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A }, 364 { "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A }, 365 { NULL }, 366}; 367 368AVFILTER_DEFINE_CLASS(abuffer); 369 370static av_cold int init_audio(AVFilterContext *ctx) 371{ 372 BufferSourceContext *s = ctx->priv; 373 int ret = 0; 374 375 if (s->sample_fmt == AV_SAMPLE_FMT_NONE) { 376 av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n"); 377 return AVERROR(EINVAL); 378 } 379 380 if (s->channel_layout_str) { 381 int n; 382 383 s->channel_layout = av_get_channel_layout(s->channel_layout_str); 384 if (!s->channel_layout) { 385 av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n", 386 s->channel_layout_str); 387 return AVERROR(EINVAL); 388 } 389 n = av_get_channel_layout_nb_channels(s->channel_layout); 390 if (s->channels) { 391 if (n != s->channels) { 392 av_log(ctx, AV_LOG_ERROR, 393 "Mismatching channel count %d and layout '%s' " 394 "(%d channels)\n", 395 s->channels, s->channel_layout_str, n); 396 return AVERROR(EINVAL); 397 } 398 } 399 s->channels = n; 400 } else if (!s->channels) { 401 av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor " 402 "channel layout specified\n"); 403 return AVERROR(EINVAL); 404 } 405 406 if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*)))) 407 return AVERROR(ENOMEM); 408 409 if (!s->time_base.num) 410 s->time_base = (AVRational){1, s->sample_rate}; 411 412 av_log(ctx, AV_LOG_VERBOSE, 413 "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n", 414 s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt), 415 s->sample_rate, s->channel_layout_str); 416 s->warning_limit = 100; 417 418 return ret; 419} 420 421static av_cold void uninit(AVFilterContext *ctx) 422{ 423 BufferSourceContext *s = ctx->priv; 424 while (s->fifo && av_fifo_size(s->fifo)) { 425 AVFrame *frame; 426 av_fifo_generic_read(s->fifo, &frame, sizeof(frame), NULL); 427 av_frame_free(&frame); 428 } 429 av_fifo_freep(&s->fifo); 430} 431 432static int query_formats(AVFilterContext *ctx) 433{ 434 BufferSourceContext *c = ctx->priv; 435 AVFilterChannelLayouts *channel_layouts = NULL; 436 AVFilterFormats *formats = NULL; 437 AVFilterFormats *samplerates = NULL; 438 439 switch (ctx->outputs[0]->type) { 440 case AVMEDIA_TYPE_VIDEO: 441 ff_add_format(&formats, c->pix_fmt); 442 ff_set_common_formats(ctx, formats); 443 break; 444 case AVMEDIA_TYPE_AUDIO: 445 ff_add_format(&formats, c->sample_fmt); 446 ff_set_common_formats(ctx, formats); 447 448 ff_add_format(&samplerates, c->sample_rate); 449 ff_set_common_samplerates(ctx, samplerates); 450 451 ff_add_channel_layout(&channel_layouts, 452 c->channel_layout ? c->channel_layout : 453 FF_COUNT2LAYOUT(c->channels)); 454 ff_set_common_channel_layouts(ctx, channel_layouts); 455 break; 456 default: 457 return AVERROR(EINVAL); 458 } 459 460 return 0; 461} 462 463static int config_props(AVFilterLink *link) 464{ 465 BufferSourceContext *c = link->src->priv; 466 467 switch (link->type) { 468 case AVMEDIA_TYPE_VIDEO: 469 link->w = c->w; 470 link->h = c->h; 471 link->sample_aspect_ratio = c->pixel_aspect; 472 break; 473 case AVMEDIA_TYPE_AUDIO: 474 if (!c->channel_layout) 475 c->channel_layout = link->channel_layout; 476 break; 477 default: 478 return AVERROR(EINVAL); 479 } 480 481 link->time_base = c->time_base; 482 link->frame_rate = c->frame_rate; 483 return 0; 484} 485 486static int request_frame(AVFilterLink *link) 487{ 488 BufferSourceContext *c = link->src->priv; 489 AVFrame *frame; 490 491 if (!av_fifo_size(c->fifo)) { 492 if (c->eof) 493 return AVERROR_EOF; 494 c->nb_failed_requests++; 495 return AVERROR(EAGAIN); 496 } 497 av_fifo_generic_read(c->fifo, &frame, sizeof(frame), NULL); 498 499 return ff_filter_frame(link, frame); 500} 501 502static int poll_frame(AVFilterLink *link) 503{ 504 BufferSourceContext *c = link->src->priv; 505 int size = av_fifo_size(c->fifo); 506 if (!size && c->eof) 507 return AVERROR_EOF; 508 return size/sizeof(AVFrame*); 509} 510 511static const AVFilterPad avfilter_vsrc_buffer_outputs[] = { 512 { 513 .name = "default", 514 .type = AVMEDIA_TYPE_VIDEO, 515 .request_frame = request_frame, 516 .poll_frame = poll_frame, 517 .config_props = config_props, 518 }, 519 { NULL } 520}; 521 522AVFilter ff_vsrc_buffer = { 523 .name = "buffer", 524 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."), 525 .priv_size = sizeof(BufferSourceContext), 526 .query_formats = query_formats, 527 528 .init = init_video, 529 .uninit = uninit, 530 531 .inputs = NULL, 532 .outputs = avfilter_vsrc_buffer_outputs, 533 .priv_class = &buffer_class, 534}; 535 536static const AVFilterPad avfilter_asrc_abuffer_outputs[] = { 537 { 538 .name = "default", 539 .type = AVMEDIA_TYPE_AUDIO, 540 .request_frame = request_frame, 541 .poll_frame = poll_frame, 542 .config_props = config_props, 543 }, 544 { NULL } 545}; 546 547AVFilter ff_asrc_abuffer = { 548 .name = "abuffer", 549 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."), 550 .priv_size = sizeof(BufferSourceContext), 551 .query_formats = query_formats, 552 553 .init = init_audio, 554 .uninit = uninit, 555 556 .inputs = NULL, 557 .outputs = avfilter_asrc_abuffer_outputs, 558 .priv_class = &abuffer_class, 559}; 560