2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "channel_layout.h"
27 #include "samplefmt.h"
29 #if FF_API_FRAME_GET_SET
30 MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
31 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration)
32 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
33 MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout)
34 MAKE_ACCESSORS(AVFrame, frame, int, channels)
35 MAKE_ACCESSORS(AVFrame, frame, int, sample_rate)
36 MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata)
37 MAKE_ACCESSORS(AVFrame, frame, int, decode_error_flags)
38 MAKE_ACCESSORS(AVFrame, frame, int, pkt_size)
39 MAKE_ACCESSORS(AVFrame, frame, enum AVColorSpace, colorspace)
40 MAKE_ACCESSORS(AVFrame, frame, enum AVColorRange, color_range)
43 #define CHECK_CHANNELS_CONSISTENCY(frame) \
44 av_assert2(!(frame)->channel_layout || \
45 (frame)->channels == \
46 av_get_channel_layout_nb_channels((frame)->channel_layout))
49 int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type)
51 av_buffer_unref(&f->qp_table_buf);
53 f->qp_table_buf = buf;
55 FF_DISABLE_DEPRECATION_WARNINGS
56 f->qscale_table = buf->data;
58 f->qscale_type = qp_type;
59 FF_ENABLE_DEPRECATION_WARNINGS
64 int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
66 FF_DISABLE_DEPRECATION_WARNINGS
68 *type = f->qscale_type;
69 FF_ENABLE_DEPRECATION_WARNINGS
74 return f->qp_table_buf->data;
78 const char *av_get_colorspace_name(enum AVColorSpace val)
80 static const char * const name[] = {
81 [AVCOL_SPC_RGB] = "GBR",
82 [AVCOL_SPC_BT709] = "bt709",
83 [AVCOL_SPC_FCC] = "fcc",
84 [AVCOL_SPC_BT470BG] = "bt470bg",
85 [AVCOL_SPC_SMPTE170M] = "smpte170m",
86 [AVCOL_SPC_SMPTE240M] = "smpte240m",
87 [AVCOL_SPC_YCOCG] = "YCgCo",
89 if ((unsigned)val >= FF_ARRAY_ELEMS(name))
94 static void get_frame_defaults(AVFrame *frame)
96 if (frame->extended_data != frame->data)
97 av_freep(&frame->extended_data);
99 memset(frame, 0, sizeof(*frame));
102 frame->pkt_dts = AV_NOPTS_VALUE;
104 FF_DISABLE_DEPRECATION_WARNINGS
105 frame->pkt_pts = AV_NOPTS_VALUE;
106 FF_ENABLE_DEPRECATION_WARNINGS
108 frame->best_effort_timestamp = AV_NOPTS_VALUE;
109 frame->pkt_duration = 0;
111 frame->pkt_size = -1;
112 frame->key_frame = 1;
113 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
114 frame->format = -1; /* unknown */
115 frame->extended_data = frame->data;
116 frame->color_primaries = AVCOL_PRI_UNSPECIFIED;
117 frame->color_trc = AVCOL_TRC_UNSPECIFIED;
118 frame->colorspace = AVCOL_SPC_UNSPECIFIED;
119 frame->color_range = AVCOL_RANGE_UNSPECIFIED;
120 frame->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
124 static void free_side_data(AVFrameSideData **ptr_sd)
126 AVFrameSideData *sd = *ptr_sd;
128 av_buffer_unref(&sd->buf);
129 av_dict_free(&sd->metadata);
133 static void wipe_side_data(AVFrame *frame)
137 for (i = 0; i < frame->nb_side_data; i++) {
138 free_side_data(&frame->side_data[i]);
140 frame->nb_side_data = 0;
142 av_freep(&frame->side_data);
145 AVFrame *av_frame_alloc(void)
147 AVFrame *frame = av_mallocz(sizeof(*frame));
152 frame->extended_data = NULL;
153 get_frame_defaults(frame);
158 void av_frame_free(AVFrame **frame)
160 if (!frame || !*frame)
163 av_frame_unref(*frame);
167 static int get_video_buffer(AVFrame *frame, int align)
169 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
173 return AVERROR(EINVAL);
175 if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
178 if (!frame->linesize[0]) {
180 align = 32; /* STRIDE_ALIGN. Should be av_cpu_max_align() */
182 for(i=1; i<=align; i+=i) {
183 ret = av_image_fill_linesizes(frame->linesize, frame->format,
184 FFALIGN(frame->width, i));
187 if (!(frame->linesize[0] & (align-1)))
191 for (i = 0; i < 4 && frame->linesize[i]; i++)
192 frame->linesize[i] = FFALIGN(frame->linesize[i], align);
195 for (i = 0; i < 4 && frame->linesize[i]; i++) {
196 int h = FFALIGN(frame->height, 32);
197 if (i == 1 || i == 2)
198 h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
200 frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h + 16 + 16/*STRIDE_ALIGN*/ - 1);
204 frame->data[i] = frame->buf[i]->data;
206 if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
207 av_buffer_unref(&frame->buf[1]);
208 frame->buf[1] = av_buffer_alloc(AVPALETTE_SIZE);
211 frame->data[1] = frame->buf[1]->data;
214 frame->extended_data = frame->data;
218 av_frame_unref(frame);
219 return AVERROR(ENOMEM);
222 static int get_audio_buffer(AVFrame *frame, int align)
225 int planar = av_sample_fmt_is_planar(frame->format);
229 if (!frame->channels)
230 frame->channels = av_get_channel_layout_nb_channels(frame->channel_layout);
232 channels = frame->channels;
233 planes = planar ? channels : 1;
235 CHECK_CHANNELS_CONSISTENCY(frame);
236 if (!frame->linesize[0]) {
237 ret = av_samples_get_buffer_size(&frame->linesize[0], channels,
238 frame->nb_samples, frame->format,
244 if (planes > AV_NUM_DATA_POINTERS) {
245 frame->extended_data = av_mallocz_array(planes,
246 sizeof(*frame->extended_data));
247 frame->extended_buf = av_mallocz_array((planes - AV_NUM_DATA_POINTERS),
248 sizeof(*frame->extended_buf));
249 if (!frame->extended_data || !frame->extended_buf) {
250 av_freep(&frame->extended_data);
251 av_freep(&frame->extended_buf);
252 return AVERROR(ENOMEM);
254 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
256 frame->extended_data = frame->data;
258 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
259 frame->buf[i] = av_buffer_alloc(frame->linesize[0]);
260 if (!frame->buf[i]) {
261 av_frame_unref(frame);
262 return AVERROR(ENOMEM);
264 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
266 for (i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) {
267 frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]);
268 if (!frame->extended_buf[i]) {
269 av_frame_unref(frame);
270 return AVERROR(ENOMEM);
272 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
278 int av_frame_get_buffer(AVFrame *frame, int align)
280 if (frame->format < 0)
281 return AVERROR(EINVAL);
283 if (frame->width > 0 && frame->height > 0)
284 return get_video_buffer(frame, align);
285 else if (frame->nb_samples > 0 && (frame->channel_layout || frame->channels > 0))
286 return get_audio_buffer(frame, align);
288 return AVERROR(EINVAL);
291 static int frame_copy_props(AVFrame *dst, const AVFrame *src, int force_copy)
295 dst->key_frame = src->key_frame;
296 dst->pict_type = src->pict_type;
297 dst->sample_aspect_ratio = src->sample_aspect_ratio;
298 dst->crop_top = src->crop_top;
299 dst->crop_bottom = src->crop_bottom;
300 dst->crop_left = src->crop_left;
301 dst->crop_right = src->crop_right;
303 dst->repeat_pict = src->repeat_pict;
304 dst->interlaced_frame = src->interlaced_frame;
305 dst->top_field_first = src->top_field_first;
306 dst->palette_has_changed = src->palette_has_changed;
307 dst->sample_rate = src->sample_rate;
308 dst->opaque = src->opaque;
310 FF_DISABLE_DEPRECATION_WARNINGS
311 dst->pkt_pts = src->pkt_pts;
312 FF_ENABLE_DEPRECATION_WARNINGS
314 dst->pkt_dts = src->pkt_dts;
315 dst->pkt_pos = src->pkt_pos;
316 dst->pkt_size = src->pkt_size;
317 dst->pkt_duration = src->pkt_duration;
318 dst->reordered_opaque = src->reordered_opaque;
319 dst->quality = src->quality;
320 dst->best_effort_timestamp = src->best_effort_timestamp;
321 dst->coded_picture_number = src->coded_picture_number;
322 dst->display_picture_number = src->display_picture_number;
323 dst->flags = src->flags;
324 dst->decode_error_flags = src->decode_error_flags;
325 dst->color_primaries = src->color_primaries;
326 dst->color_trc = src->color_trc;
327 dst->colorspace = src->colorspace;
328 dst->color_range = src->color_range;
329 dst->chroma_location = src->chroma_location;
331 av_dict_copy(&dst->metadata, src->metadata, 0);
333 #if FF_API_ERROR_FRAME
334 FF_DISABLE_DEPRECATION_WARNINGS
335 memcpy(dst->error, src->error, sizeof(dst->error));
336 FF_ENABLE_DEPRECATION_WARNINGS
339 for (i = 0; i < src->nb_side_data; i++) {
340 const AVFrameSideData *sd_src = src->side_data[i];
341 AVFrameSideData *sd_dst;
342 if ( sd_src->type == AV_FRAME_DATA_PANSCAN
343 && (src->width != dst->width || src->height != dst->height))
346 sd_dst = av_frame_new_side_data(dst, sd_src->type,
350 return AVERROR(ENOMEM);
352 memcpy(sd_dst->data, sd_src->data, sd_src->size);
354 AVBufferRef *ref = av_buffer_ref(sd_src->buf);
355 sd_dst = av_frame_new_side_data_from_buf(dst, sd_src->type, ref);
357 av_buffer_unref(&ref);
359 return AVERROR(ENOMEM);
362 av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
366 FF_DISABLE_DEPRECATION_WARNINGS
367 dst->qscale_table = NULL;
369 dst->qscale_type = 0;
370 av_buffer_unref(&dst->qp_table_buf);
371 if (src->qp_table_buf) {
372 dst->qp_table_buf = av_buffer_ref(src->qp_table_buf);
373 if (dst->qp_table_buf) {
374 dst->qscale_table = dst->qp_table_buf->data;
375 dst->qstride = src->qstride;
376 dst->qscale_type = src->qscale_type;
379 FF_ENABLE_DEPRECATION_WARNINGS
382 av_buffer_unref(&dst->opaque_ref);
383 av_buffer_unref(&dst->private_ref);
384 if (src->opaque_ref) {
385 dst->opaque_ref = av_buffer_ref(src->opaque_ref);
386 if (!dst->opaque_ref)
387 return AVERROR(ENOMEM);
389 if (src->private_ref) {
390 dst->private_ref = av_buffer_ref(src->private_ref);
391 if (!dst->private_ref)
392 return AVERROR(ENOMEM);
397 int av_frame_ref(AVFrame *dst, const AVFrame *src)
401 av_assert1(dst->width == 0 && dst->height == 0);
402 av_assert1(dst->channels == 0);
404 dst->format = src->format;
405 dst->width = src->width;
406 dst->height = src->height;
407 dst->channels = src->channels;
408 dst->channel_layout = src->channel_layout;
409 dst->nb_samples = src->nb_samples;
411 ret = frame_copy_props(dst, src, 0);
415 /* duplicate the frame data if it's not refcounted */
417 ret = av_frame_get_buffer(dst, 32);
421 ret = av_frame_copy(dst, src);
428 /* ref the buffers */
429 for (i = 0; i < FF_ARRAY_ELEMS(src->buf); i++) {
432 dst->buf[i] = av_buffer_ref(src->buf[i]);
434 ret = AVERROR(ENOMEM);
439 if (src->extended_buf) {
440 dst->extended_buf = av_mallocz_array(sizeof(*dst->extended_buf),
441 src->nb_extended_buf);
442 if (!dst->extended_buf) {
443 ret = AVERROR(ENOMEM);
446 dst->nb_extended_buf = src->nb_extended_buf;
448 for (i = 0; i < src->nb_extended_buf; i++) {
449 dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]);
450 if (!dst->extended_buf[i]) {
451 ret = AVERROR(ENOMEM);
457 if (src->hw_frames_ctx) {
458 dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
459 if (!dst->hw_frames_ctx) {
460 ret = AVERROR(ENOMEM);
465 /* duplicate extended data */
466 if (src->extended_data != src->data) {
467 int ch = src->channels;
470 ret = AVERROR(EINVAL);
473 CHECK_CHANNELS_CONSISTENCY(src);
475 dst->extended_data = av_malloc_array(sizeof(*dst->extended_data), ch);
476 if (!dst->extended_data) {
477 ret = AVERROR(ENOMEM);
480 memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch);
482 dst->extended_data = dst->data;
484 memcpy(dst->data, src->data, sizeof(src->data));
485 memcpy(dst->linesize, src->linesize, sizeof(src->linesize));
494 AVFrame *av_frame_clone(const AVFrame *src)
496 AVFrame *ret = av_frame_alloc();
501 if (av_frame_ref(ret, src) < 0)
507 void av_frame_unref(AVFrame *frame)
514 wipe_side_data(frame);
516 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
517 av_buffer_unref(&frame->buf[i]);
518 for (i = 0; i < frame->nb_extended_buf; i++)
519 av_buffer_unref(&frame->extended_buf[i]);
520 av_freep(&frame->extended_buf);
521 av_dict_free(&frame->metadata);
523 av_buffer_unref(&frame->qp_table_buf);
526 av_buffer_unref(&frame->hw_frames_ctx);
528 av_buffer_unref(&frame->opaque_ref);
529 av_buffer_unref(&frame->private_ref);
531 get_frame_defaults(frame);
534 void av_frame_move_ref(AVFrame *dst, AVFrame *src)
536 av_assert1(dst->width == 0 && dst->height == 0);
537 av_assert1(dst->channels == 0);
540 if (src->extended_data == src->data)
541 dst->extended_data = dst->data;
542 memset(src, 0, sizeof(*src));
543 get_frame_defaults(src);
546 int av_frame_is_writable(AVFrame *frame)
550 /* assume non-refcounted frames are not writable */
554 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
556 ret &= !!av_buffer_is_writable(frame->buf[i]);
557 for (i = 0; i < frame->nb_extended_buf; i++)
558 ret &= !!av_buffer_is_writable(frame->extended_buf[i]);
563 int av_frame_make_writable(AVFrame *frame)
569 return AVERROR(EINVAL);
571 if (av_frame_is_writable(frame))
574 memset(&tmp, 0, sizeof(tmp));
575 tmp.format = frame->format;
576 tmp.width = frame->width;
577 tmp.height = frame->height;
578 tmp.channels = frame->channels;
579 tmp.channel_layout = frame->channel_layout;
580 tmp.nb_samples = frame->nb_samples;
581 ret = av_frame_get_buffer(&tmp, 32);
585 ret = av_frame_copy(&tmp, frame);
587 av_frame_unref(&tmp);
591 ret = av_frame_copy_props(&tmp, frame);
593 av_frame_unref(&tmp);
597 av_frame_unref(frame);
600 if (tmp.data == tmp.extended_data)
601 frame->extended_data = frame->data;
606 int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
608 return frame_copy_props(dst, src, 1);
611 AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane)
616 if (frame->nb_samples) {
617 int channels = frame->channels;
620 CHECK_CHANNELS_CONSISTENCY(frame);
621 planes = av_sample_fmt_is_planar(frame->format) ? channels : 1;
625 if (plane < 0 || plane >= planes || !frame->extended_data[plane])
627 data = frame->extended_data[plane];
629 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) {
630 AVBufferRef *buf = frame->buf[i];
631 if (data >= buf->data && data < buf->data + buf->size)
634 for (i = 0; i < frame->nb_extended_buf; i++) {
635 AVBufferRef *buf = frame->extended_buf[i];
636 if (data >= buf->data && data < buf->data + buf->size)
642 AVFrameSideData *av_frame_new_side_data_from_buf(AVFrame *frame,
643 enum AVFrameSideDataType type,
646 AVFrameSideData *ret, **tmp;
651 if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
654 tmp = av_realloc(frame->side_data,
655 (frame->nb_side_data + 1) * sizeof(*frame->side_data));
658 frame->side_data = tmp;
660 ret = av_mallocz(sizeof(*ret));
665 ret->data = ret->buf->data;
666 ret->size = buf->size;
669 frame->side_data[frame->nb_side_data++] = ret;
674 AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
675 enum AVFrameSideDataType type,
678 AVFrameSideData *ret;
679 AVBufferRef *buf = av_buffer_alloc(size);
680 ret = av_frame_new_side_data_from_buf(frame, type, buf);
682 av_buffer_unref(&buf);
686 AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
687 enum AVFrameSideDataType type)
691 for (i = 0; i < frame->nb_side_data; i++) {
692 if (frame->side_data[i]->type == type)
693 return frame->side_data[i];
698 static int frame_copy_video(AVFrame *dst, const AVFrame *src)
700 const uint8_t *src_data[4];
703 if (dst->width < src->width ||
704 dst->height < src->height)
705 return AVERROR(EINVAL);
707 planes = av_pix_fmt_count_planes(dst->format);
708 for (i = 0; i < planes; i++)
709 if (!dst->data[i] || !src->data[i])
710 return AVERROR(EINVAL);
712 memcpy(src_data, src->data, sizeof(src_data));
713 av_image_copy(dst->data, dst->linesize,
714 src_data, src->linesize,
715 dst->format, src->width, src->height);
720 static int frame_copy_audio(AVFrame *dst, const AVFrame *src)
722 int planar = av_sample_fmt_is_planar(dst->format);
723 int channels = dst->channels;
724 int planes = planar ? channels : 1;
727 if (dst->nb_samples != src->nb_samples ||
728 dst->channels != src->channels ||
729 dst->channel_layout != src->channel_layout)
730 return AVERROR(EINVAL);
732 CHECK_CHANNELS_CONSISTENCY(src);
734 for (i = 0; i < planes; i++)
735 if (!dst->extended_data[i] || !src->extended_data[i])
736 return AVERROR(EINVAL);
738 av_samples_copy(dst->extended_data, src->extended_data, 0, 0,
739 dst->nb_samples, channels, dst->format);
744 int av_frame_copy(AVFrame *dst, const AVFrame *src)
746 if (dst->format != src->format || dst->format < 0)
747 return AVERROR(EINVAL);
749 if (dst->width > 0 && dst->height > 0)
750 return frame_copy_video(dst, src);
751 else if (dst->nb_samples > 0 && dst->channels > 0)
752 return frame_copy_audio(dst, src);
754 return AVERROR(EINVAL);
757 void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
761 for (i = 0; i < frame->nb_side_data; i++) {
762 AVFrameSideData *sd = frame->side_data[i];
763 if (sd->type == type) {
764 free_side_data(&frame->side_data[i]);
765 frame->side_data[i] = frame->side_data[frame->nb_side_data - 1];
766 frame->nb_side_data--;
771 const char *av_frame_side_data_name(enum AVFrameSideDataType type)
774 case AV_FRAME_DATA_PANSCAN: return "AVPanScan";
775 case AV_FRAME_DATA_A53_CC: return "ATSC A53 Part 4 Closed Captions";
776 case AV_FRAME_DATA_STEREO3D: return "Stereoscopic 3d metadata";
777 case AV_FRAME_DATA_MATRIXENCODING: return "AVMatrixEncoding";
778 case AV_FRAME_DATA_DOWNMIX_INFO: return "Metadata relevant to a downmix procedure";
779 case AV_FRAME_DATA_REPLAYGAIN: return "AVReplayGain";
780 case AV_FRAME_DATA_DISPLAYMATRIX: return "3x3 displaymatrix";
781 case AV_FRAME_DATA_AFD: return "Active format description";
782 case AV_FRAME_DATA_MOTION_VECTORS: return "Motion vectors";
783 case AV_FRAME_DATA_SKIP_SAMPLES: return "Skip samples";
784 case AV_FRAME_DATA_AUDIO_SERVICE_TYPE: return "Audio service type";
785 case AV_FRAME_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
786 case AV_FRAME_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
787 case AV_FRAME_DATA_GOP_TIMECODE: return "GOP timecode";
788 case AV_FRAME_DATA_ICC_PROFILE: return "ICC profile";
793 static int calc_cropping_offsets(size_t offsets[4], const AVFrame *frame,
794 const AVPixFmtDescriptor *desc)
798 for (i = 0; frame->data[i]; i++) {
799 const AVComponentDescriptor *comp = NULL;
800 int shift_x = (i == 1 || i == 2) ? desc->log2_chroma_w : 0;
801 int shift_y = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
803 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL) && i == 1) {
808 /* find any component descriptor for this plane */
809 for (j = 0; j < desc->nb_components; j++) {
810 if (desc->comp[j].plane == i) {
811 comp = &desc->comp[j];
818 offsets[i] = (frame->crop_top >> shift_y) * frame->linesize[i] +
819 (frame->crop_left >> shift_x) * comp->step;
825 int av_frame_apply_cropping(AVFrame *frame, int flags)
827 const AVPixFmtDescriptor *desc;
831 if (!(frame->width > 0 && frame->height > 0))
832 return AVERROR(EINVAL);
834 if (frame->crop_left >= INT_MAX - frame->crop_right ||
835 frame->crop_top >= INT_MAX - frame->crop_bottom ||
836 (frame->crop_left + frame->crop_right) >= frame->width ||
837 (frame->crop_top + frame->crop_bottom) >= frame->height)
838 return AVERROR(ERANGE);
840 desc = av_pix_fmt_desc_get(frame->format);
844 /* Apply just the right/bottom cropping for hwaccel formats. Bitstream
845 * formats cannot be easily handled here either (and corresponding decoders
846 * should not export any cropping anyway), so do the same for those as well.
848 if (desc->flags & (AV_PIX_FMT_FLAG_BITSTREAM | AV_PIX_FMT_FLAG_HWACCEL)) {
849 frame->width -= frame->crop_right;
850 frame->height -= frame->crop_bottom;
851 frame->crop_right = 0;
852 frame->crop_bottom = 0;
856 /* calculate the offsets for each plane */
857 calc_cropping_offsets(offsets, frame, desc);
859 /* adjust the offsets to avoid breaking alignment */
860 if (!(flags & AV_FRAME_CROP_UNALIGNED)) {
861 int log2_crop_align = frame->crop_left ? ff_ctz(frame->crop_left) : INT_MAX;
862 int min_log2_align = INT_MAX;
864 for (i = 0; frame->data[i]; i++) {
865 int log2_align = offsets[i] ? ff_ctz(offsets[i]) : INT_MAX;
866 min_log2_align = FFMIN(log2_align, min_log2_align);
869 /* we assume, and it should always be true, that the data alignment is
870 * related to the cropping alignment by a constant power-of-2 factor */
871 if (log2_crop_align < min_log2_align)
874 if (min_log2_align < 5) {
875 frame->crop_left &= ~((1 << (5 + log2_crop_align - min_log2_align)) - 1);
876 calc_cropping_offsets(offsets, frame, desc);
880 for (i = 0; frame->data[i]; i++)
881 frame->data[i] += offsets[i];
883 frame->width -= (frame->crop_left + frame->crop_right);
884 frame->height -= (frame->crop_top + frame->crop_bottom);
885 frame->crop_left = 0;
886 frame->crop_right = 0;
888 frame->crop_bottom = 0;