FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/get_buffer.c
Date: 2025-07-12 22:17:06
Exec Total Coverage
Lines: 94 146 64.4%
Functions: 5 5 100.0%
Branches: 62 96 64.6%
Line Branch Exec Source
1 /*
2 * The default get_buffer2() implementation
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
23 #include "libavutil/avassert.h"
24 #include "libavutil/avutil.h"
25 #include "libavutil/buffer.h"
26 #include "libavutil/frame.h"
27 #include "libavutil/hwcontext.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/mem.h"
30 #include "libavutil/samplefmt.h"
31 #include "libavutil/version.h"
32
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "libavutil/refstruct.h"
36
37 typedef struct FramePool {
38 /**
39 * Pools for each data plane. For audio all the planes have the same size,
40 * so only pools[0] is used.
41 */
42 AVBufferPool *pools[4];
43
44 /*
45 * Pool parameters
46 */
47 int format;
48 int width, height;
49 int stride_align[AV_NUM_DATA_POINTERS];
50 int linesize[4];
51 int planes;
52 int channels;
53 int samples;
54 } FramePool;
55
56 15497 static void frame_pool_free(AVRefStructOpaque unused, void *obj)
57 {
58 15497 FramePool *pool = obj;
59 int i;
60
61
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 77485 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
62 61988 av_buffer_pool_uninit(&pool->pools[i]);
63 15497 }
64
65 393489 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
66 {
67 393489 FramePool *pool = avctx->internal->pool;
68 int i, ret;
69
70
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 393489 if (pool && pool->format == frame->format) {
71
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 384604 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
72
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 125651 pool->width == frame->width && pool->height == frame->height)
73 125409 return 0;
74
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 259195 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
75
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 258953 pool->channels == frame->ch_layout.nb_channels &&
76
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 258940 frame->nb_samples == pool->samples)
77 252583 return 0;
78 }
79
80 15497 pool = av_refstruct_alloc_ext(sizeof(*pool), 0, NULL, frame_pool_free);
81
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 15497 if (!pool)
82 ✗ return AVERROR(ENOMEM);
83
84
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 15497 switch (avctx->codec_type) {
85 7167 case AVMEDIA_TYPE_VIDEO: {
86 int linesize[4];
87 7167 int w = frame->width;
88 7167 int h = frame->height;
89 int unaligned;
90 ptrdiff_t linesize1[4];
91 size_t size[4];
92
93 7167 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
94
95 do {
96 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
97 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
98 14283 ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
99
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 14283 if (ret < 0)
100 ✗ goto fail;
101 // increase alignment of w for next try (rhs gives the lowest bit set in w)
102 14283 w += w & ~(w - 1);
103
104 14283 unaligned = 0;
105
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 71415 for (i = 0; i < 4; i++)
106 57132 unaligned |= linesize[i] % pool->stride_align[i];
107
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 14283 } while (unaligned);
108
109
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 35835 for (i = 0; i < 4; i++)
110 28668 linesize1[i] = linesize[i];
111 7167 ret = av_image_fill_plane_sizes(size, avctx->pix_fmt, h, linesize1);
112
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 7167 if (ret < 0)
113 ✗ goto fail;
114
115
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 35835 for (i = 0; i < 4; i++) {
116 28668 pool->linesize[i] = linesize[i];
117
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 28668 if (size[i]) {
118
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 19938 if (size[i] > INT_MAX - (16 + STRIDE_ALIGN - 1)) {
119 ✗ ret = AVERROR(EINVAL);
120 ✗ goto fail;
121 }
122 19938 pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
123 CONFIG_MEMORY_POISONING ?
124 NULL :
125 av_buffer_allocz);
126
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 19938 if (!pool->pools[i]) {
127 ✗ ret = AVERROR(ENOMEM);
128 ✗ goto fail;
129 }
130 }
131 }
132 7167 pool->format = frame->format;
133 7167 pool->width = frame->width;
134 7167 pool->height = frame->height;
135
136 7167 break;
137 }
138 8330 case AVMEDIA_TYPE_AUDIO: {
139 8330 ret = av_samples_get_buffer_size(&pool->linesize[0],
140 frame->ch_layout.nb_channels,
141 8330 frame->nb_samples, frame->format, 0);
142
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 8330 if (ret < 0)
143 ✗ goto fail;
144
145 8330 pool->pools[0] = av_buffer_pool_init(pool->linesize[0],
146 CONFIG_MEMORY_POISONING ?
147 NULL :
148 av_buffer_allocz);
149
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 8330 if (!pool->pools[0]) {
150 ✗ ret = AVERROR(ENOMEM);
151 ✗ goto fail;
152 }
153
154 8330 pool->format = frame->format;
155 8330 pool->channels = frame->ch_layout.nb_channels;
156 8330 pool->samples = frame->nb_samples;
157
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 8330 pool->planes = av_sample_fmt_is_planar(pool->format) ? pool->channels : 1;
158 8330 break;
159 }
160 ✗ default: av_assert0(0);
161 }
162
163 15497 av_refstruct_unref(&avctx->internal->pool);
164 15497 avctx->internal->pool = pool;
165
166 15497 return 0;
167 ✗ fail:
168 ✗ av_refstruct_unref(&pool);
169 ✗ return ret;
170 }
171
172 260913 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
173 {
174 260913 FramePool *pool = avctx->internal->pool;
175 260913 int planes = pool->planes;
176 int i;
177
178 260913 frame->linesize[0] = pool->linesize[0];
179
180
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 260913 if (planes > AV_NUM_DATA_POINTERS) {
181 ✗ frame->extended_data = av_calloc(planes, sizeof(*frame->extended_data));
182 ✗ frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
183 ✗ frame->extended_buf = av_calloc(frame->nb_extended_buf,
184 sizeof(*frame->extended_buf));
185 ✗ if (!frame->extended_data || !frame->extended_buf) {
186 ✗ av_freep(&frame->extended_data);
187 ✗ av_freep(&frame->extended_buf);
188 ✗ return AVERROR(ENOMEM);
189 }
190 } else {
191 260913 frame->extended_data = frame->data;
192
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 260913 av_assert0(frame->nb_extended_buf == 0);
193 }
194
195
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 668638 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
196 407725 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
197
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 407725 if (!frame->buf[i])
198 ✗ goto fail;
199 407725 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
200 }
201
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 260913 for (i = 0; i < frame->nb_extended_buf; i++) {
202 ✗ frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
203 ✗ if (!frame->extended_buf[i])
204 ✗ goto fail;
205 ✗ frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
206 }
207
208
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 260913 if (avctx->debug & FF_DEBUG_BUFFERS)
209 ✗ av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
210
211 260913 return 0;
212 ✗ fail:
213 ✗ av_frame_unref(frame);
214 ✗ return AVERROR(ENOMEM);
215 }
216
217 132576 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
218 {
219 132576 FramePool *pool = s->internal->pool;
220 int i;
221
222
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 132576 if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
223 ✗ av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
224 ✗ return -1;
225 }
226
227 132576 memset(pic->data, 0, sizeof(pic->data));
228 132576 pic->extended_data = pic->data;
229
230
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 508041 for (i = 0; i < 4 && pool->pools[i]; i++) {
231 375465 pic->linesize[i] = pool->linesize[i];
232
233 375465 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
234
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 375465 if (!pic->buf[i])
235 ✗ goto fail;
236
237 375465 pic->data[i] = pic->buf[i]->data;
238 }
239
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 817719 for (; i < AV_NUM_DATA_POINTERS; i++) {
240 685143 pic->data[i] = NULL;
241 685143 pic->linesize[i] = 0;
242 }
243
244
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 132576 if (s->debug & FF_DEBUG_BUFFERS)
245 ✗ av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
246
247 132576 return 0;
248 ✗ fail:
249 ✗ av_frame_unref(pic);
250 ✗ return AVERROR(ENOMEM);
251 }
252
253 393489 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
254 {
255 int ret;
256
257
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 393489 if (avctx->hw_frames_ctx) {
258 ✗ ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
259 ✗ if (ret == AVERROR(ENOMEM)) {
260 ✗ AVHWFramesContext *frames_ctx =
261 ✗ (AVHWFramesContext*)avctx->hw_frames_ctx->data;
262 ✗ if (frames_ctx->initial_pool_size > 0 &&
263 ✗ !avctx->internal->warned_on_failed_allocation_from_fixed_pool) {
264 ✗ av_log(avctx, AV_LOG_WARNING, "Failed to allocate a %s/%s "
265 "frame from a fixed pool of hardware frames.\n",
266 av_get_pix_fmt_name(frames_ctx->format),
267 av_get_pix_fmt_name(frames_ctx->sw_format));
268 ✗ av_log(avctx, AV_LOG_WARNING, "Consider setting "
269 "extra_hw_frames to a larger value "
270 "(currently set to %d, giving a pool size of %d).\n",
271 avctx->extra_hw_frames, frames_ctx->initial_pool_size);
272 ✗ avctx->internal->warned_on_failed_allocation_from_fixed_pool = 1;
273 }
274 }
275 ✗ frame->width = avctx->coded_width;
276 ✗ frame->height = avctx->coded_height;
277 ✗ return ret;
278 }
279
280
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 393489 if ((ret = update_frame_pool(avctx, frame)) < 0)
281 ✗ return ret;
282
283
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 393489 switch (avctx->codec_type) {
284 132576 case AVMEDIA_TYPE_VIDEO:
285 132576 return video_get_buffer(avctx, frame);
286 260913 case AVMEDIA_TYPE_AUDIO:
287 260913 return audio_get_buffer(avctx, frame);
288 ✗ default:
289 ✗ return -1;
290 }
291 }
292