3 * This file is part of Libav.
5 * Libav is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * Libav is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with Libav; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "channel_layout.h"
27 #include "samplefmt.h"
29 static void get_frame_defaults(AVFrame *frame)
31 if (frame->extended_data != frame->data)
32 av_freep(&frame->extended_data);
34 memset(frame, 0, sizeof(*frame));
36 frame->pts = AV_NOPTS_VALUE;
38 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
39 frame->format = -1; /* unknown */
40 frame->extended_data = frame->data;
43 AVFrame *av_frame_alloc(void)
45 AVFrame *frame = av_mallocz(sizeof(*frame));
50 get_frame_defaults(frame);
55 void av_frame_free(AVFrame **frame)
57 if (!frame || !*frame)
60 av_frame_unref(*frame);
64 static int get_video_buffer(AVFrame *frame, int align)
66 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
70 return AVERROR(EINVAL);
72 if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
75 if (!frame->linesize[0]) {
76 ret = av_image_fill_linesizes(frame->linesize, frame->format,
81 for (i = 0; i < 4 && frame->linesize[i]; i++)
82 frame->linesize[i] = FFALIGN(frame->linesize[i], align);
85 for (i = 0; i < 4 && frame->linesize[i]; i++) {
86 int h = frame->height;
88 h = -((-h) >> desc->log2_chroma_h);
90 frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h);
94 frame->data[i] = frame->buf[i]->data;
96 if (desc->flags & PIX_FMT_PAL || desc->flags & PIX_FMT_PSEUDOPAL) {
97 av_buffer_unref(&frame->buf[1]);
98 frame->buf[1] = av_buffer_alloc(1024);
101 frame->data[1] = frame->buf[1]->data;
104 frame->extended_data = frame->data;
108 av_frame_unref(frame);
109 return AVERROR(ENOMEM);
112 static int get_audio_buffer(AVFrame *frame, int align)
114 int channels = av_get_channel_layout_nb_channels(frame->channel_layout);
115 int planar = av_sample_fmt_is_planar(frame->format);
116 int planes = planar ? channels : 1;
119 if (!frame->linesize[0]) {
120 ret = av_samples_get_buffer_size(&frame->linesize[0], channels,
121 frame->nb_samples, frame->format,
127 if (planes > AV_NUM_DATA_POINTERS) {
128 frame->extended_data = av_mallocz(planes *
129 sizeof(*frame->extended_data));
130 frame->extended_buf = av_mallocz((planes - AV_NUM_DATA_POINTERS) *
131 sizeof(*frame->extended_buf));
132 if (!frame->extended_data || !frame->extended_buf) {
133 av_freep(&frame->extended_data);
134 av_freep(&frame->extended_buf);
135 return AVERROR(ENOMEM);
137 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
139 frame->extended_data = frame->data;
141 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
142 frame->buf[i] = av_buffer_alloc(frame->linesize[0]);
143 if (!frame->buf[i]) {
144 av_frame_unref(frame);
145 return AVERROR(ENOMEM);
147 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
149 for (i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) {
150 frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]);
151 if (!frame->extended_buf[i]) {
152 av_frame_unref(frame);
153 return AVERROR(ENOMEM);
155 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
161 int av_frame_get_buffer(AVFrame *frame, int align)
163 if (frame->format < 0)
164 return AVERROR(EINVAL);
166 if (frame->width > 0 && frame->height > 0)
167 return get_video_buffer(frame, align);
168 else if (frame->nb_samples > 0 && frame->channel_layout)
169 return get_audio_buffer(frame, align);
171 return AVERROR(EINVAL);
174 int av_frame_ref(AVFrame *dst, AVFrame *src)
178 dst->format = src->format;
179 dst->width = src->width;
180 dst->height = src->height;
181 dst->channel_layout = src->channel_layout;
182 dst->nb_samples = src->nb_samples;
184 ret = av_frame_copy_props(dst, src);
188 /* duplicate the frame data if it's not refcounted */
190 ret = av_frame_get_buffer(dst, 32);
194 if (src->nb_samples) {
195 int ch = av_get_channel_layout_nb_channels(src->channel_layout);
196 av_samples_copy(dst->extended_data, src->extended_data, 0, 0,
197 dst->nb_samples, ch, dst->format);
199 av_image_copy(dst->data, dst->linesize, src->data, src->linesize,
200 dst->format, dst->width, dst->height);
205 /* ref the buffers */
206 for (i = 0; i < FF_ARRAY_ELEMS(src->buf) && src->buf[i]; i++) {
207 dst->buf[i] = av_buffer_ref(src->buf[i]);
209 ret = AVERROR(ENOMEM);
214 if (src->extended_buf) {
215 dst->extended_buf = av_mallocz(sizeof(*dst->extended_buf) *
216 src->nb_extended_buf);
217 if (!dst->extended_buf) {
218 ret = AVERROR(ENOMEM);
221 dst->nb_extended_buf = src->nb_extended_buf;
223 for (i = 0; i < src->nb_extended_buf; i++) {
224 dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]);
225 if (!dst->extended_buf[i]) {
226 ret = AVERROR(ENOMEM);
232 /* duplicate extended data */
233 if (src->extended_data != src->data) {
234 int ch = av_get_channel_layout_nb_channels(src->channel_layout);
237 ret = AVERROR(EINVAL);
241 dst->extended_data = av_malloc(sizeof(*dst->extended_data) * ch);
242 if (!dst->extended_data) {
243 ret = AVERROR(ENOMEM);
246 memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch);
248 dst->extended_data = dst->data;
250 memcpy(dst->data, src->data, sizeof(src->data));
251 memcpy(dst->linesize, src->linesize, sizeof(src->linesize));
260 AVFrame *av_frame_clone(AVFrame *src)
262 AVFrame *ret = av_frame_alloc();
267 if (av_frame_ref(ret, src) < 0)
273 void av_frame_unref(AVFrame *frame)
277 for (i = 0; i < frame->nb_side_data; i++) {
278 av_freep(&frame->side_data[i]->data);
279 av_dict_free(&frame->side_data[i]->metadata);
280 av_freep(&frame->side_data[i]);
282 av_freep(&frame->side_data);
284 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
285 av_buffer_unref(&frame->buf[i]);
286 for (i = 0; i < frame->nb_extended_buf; i++)
287 av_buffer_unref(&frame->extended_buf[i]);
288 av_freep(&frame->extended_buf);
289 get_frame_defaults(frame);
292 void av_frame_move_ref(AVFrame *dst, AVFrame *src)
295 if (src->extended_data == src->data)
296 dst->extended_data = dst->data;
297 memset(src, 0, sizeof(*src));
298 get_frame_defaults(src);
301 int av_frame_is_writable(AVFrame *frame)
305 /* assume non-refcounted frames are not writable */
309 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++)
310 ret &= !!av_buffer_is_writable(frame->buf[i]);
311 for (i = 0; i < frame->nb_extended_buf; i++)
312 ret &= !!av_buffer_is_writable(frame->extended_buf[i]);
317 int av_frame_make_writable(AVFrame *frame)
323 return AVERROR(EINVAL);
325 if (av_frame_is_writable(frame))
328 memset(&tmp, 0, sizeof(tmp));
329 tmp.format = frame->format;
330 tmp.width = frame->width;
331 tmp.height = frame->height;
332 tmp.channel_layout = frame->channel_layout;
333 tmp.nb_samples = frame->nb_samples;
334 ret = av_frame_get_buffer(&tmp, 32);
338 if (tmp.nb_samples) {
339 int ch = av_get_channel_layout_nb_channels(tmp.channel_layout);
340 av_samples_copy(tmp.extended_data, frame->extended_data, 0, 0,
341 frame->nb_samples, ch, frame->format);
343 av_image_copy(tmp.data, tmp.linesize, frame->data, frame->linesize,
344 frame->format, frame->width, frame->height);
347 ret = av_frame_copy_props(&tmp, frame);
349 av_frame_unref(&tmp);
353 av_frame_unref(frame);
356 if (tmp.data == tmp.extended_data)
357 frame->extended_data = frame->data;
362 int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
366 dst->key_frame = src->key_frame;
367 dst->pict_type = src->pict_type;
368 dst->sample_aspect_ratio = src->sample_aspect_ratio;
370 dst->repeat_pict = src->repeat_pict;
371 dst->interlaced_frame = src->interlaced_frame;
372 dst->top_field_first = src->top_field_first;
373 dst->palette_has_changed = src->palette_has_changed;
374 dst->sample_rate = src->sample_rate;
375 dst->opaque = src->opaque;
376 dst->pkt_pts = src->pkt_pts;
377 dst->pkt_dts = src->pkt_dts;
378 dst->reordered_opaque = src->reordered_opaque;
379 dst->quality = src->quality;
380 dst->coded_picture_number = src->coded_picture_number;
381 dst->display_picture_number = src->display_picture_number;
383 memcpy(dst->error, src->error, sizeof(dst->error));
385 for (i = 0; i < src->nb_side_data; i++) {
386 const AVFrameSideData *sd_src = src->side_data[i];
387 AVFrameSideData *sd_dst = av_frame_new_side_data(dst, sd_src->type,
390 for (i = 0; i < dst->nb_side_data; i++) {
391 av_freep(&dst->side_data[i]->data);
392 av_freep(&dst->side_data[i]);
393 av_dict_free(&dst->side_data[i]->metadata);
395 av_freep(&dst->side_data);
396 return AVERROR(ENOMEM);
398 memcpy(sd_dst->data, sd_src->data, sd_src->size);
399 av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
405 AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane)
410 if (frame->nb_samples) {
411 int channels = av_get_channel_layout_nb_channels(frame->channel_layout);
414 planes = av_sample_fmt_is_planar(frame->format) ? channels : 1;
418 if (plane < 0 || plane >= planes || !frame->extended_data[plane])
420 data = frame->extended_data[plane];
422 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) {
423 AVBufferRef *buf = frame->buf[i];
424 if (data >= buf->data && data < buf->data + buf->size)
427 for (i = 0; i < frame->nb_extended_buf; i++) {
428 AVBufferRef *buf = frame->extended_buf[i];
429 if (data >= buf->data && data < buf->data + buf->size)
435 AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
436 enum AVFrameSideDataType type,
439 AVFrameSideData *ret, **tmp;
441 if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
444 tmp = av_realloc(frame->side_data,
445 (frame->nb_side_data + 1) * sizeof(*frame->side_data));
448 frame->side_data = tmp;
450 ret = av_mallocz(sizeof(*ret));
454 ret->data = av_malloc(size);
463 frame->side_data[frame->nb_side_data++] = ret;
468 AVFrameSideData *av_frame_get_side_data(AVFrame *frame,
469 enum AVFrameSideDataType type)
473 for (i = 0; i < frame->nb_side_data; i++) {
474 if (frame->side_data[i]->type == type)
475 return frame->side_data[i];