| 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 | |
| 44 | typedef 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 | |
| 80 | int 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 | |
| 86 | int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame) |
| 87 | { |
| 88 | return av_buffersrc_add_frame_flags(ctx, frame, 0); |
| 89 | } |
| 90 | |
| 91 | static int av_buffersrc_add_frame_internal(AVFilterContext *ctx, |
| 92 | AVFrame *frame, int flags); |
| 93 | |
| 94 | int 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 | |
| 118 | static 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 |
| 188 | FF_DISABLE_DEPRECATION_WARNINGS |
| 189 | static 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 | |
| 197 | static 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 | |
| 205 | int 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) \ |
| 236 | do { \ |
| 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 | |
| 293 | fail: |
| 294 | av_buffer_unref(&dummy_buf); |
| 295 | av_frame_free(&frame); |
| 296 | |
| 297 | return ret; |
| 298 | } |
| 299 | FF_ENABLE_DEPRECATION_WARNINGS |
| 300 | |
| 301 | int av_buffersrc_buffer(AVFilterContext *ctx, AVFilterBufferRef *buf) |
| 302 | { |
| 303 | return av_buffersrc_add_ref(ctx, buf, 0); |
| 304 | } |
| 305 | #endif |
| 306 | |
| 307 | static 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 | |
| 327 | unsigned 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 | |
| 336 | static 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 | |
| 357 | AVFILTER_DEFINE_CLASS(buffer); |
| 358 | |
| 359 | static 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 | |
| 368 | AVFILTER_DEFINE_CLASS(abuffer); |
| 369 | |
| 370 | static 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 | |
| 421 | static 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 | |
| 432 | static 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 | |
| 463 | static 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 | |
| 486 | static 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 | |
| 502 | static 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 | |
| 511 | static 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 | |
| 522 | AVFilter 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 | |
| 536 | static 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 | |
| 547 | AVFilter 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 | }; |