FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/get_buffer.c
Date: 2024-06-18 05:56:57
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 "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 14932 static void frame_pool_free(FFRefStructOpaque unused, void *obj)
57 {
58 14932 FramePool *pool = obj;
59 int i;
60
61
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74660 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
62 59728 av_buffer_pool_uninit(&pool->pools[i]);
63 14932 }
64
65 382172 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
66 {
67 382172 FramePool *pool = avctx->internal->pool;
68 int i, ret;
69
70
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382172 if (pool && pool->format == frame->format) {
71
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373837 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
72
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114785 pool->width == frame->width && pool->height == frame->height)
73 114547 return 0;
74
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259290 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
75
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259052 pool->channels == frame->ch_layout.nb_channels &&
76
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259039 frame->nb_samples == pool->samples)
77 252693 return 0;
78 }
79
80 14932 pool = ff_refstruct_alloc_ext(sizeof(*pool), 0, NULL, frame_pool_free);
81
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14932 if (!pool)
82 return AVERROR(ENOMEM);
83
84
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14932 switch (avctx->codec_type) {
85 6669 case AVMEDIA_TYPE_VIDEO: {
86 int linesize[4];
87 6669 int w = frame->width;
88 6669 int h = frame->height;
89 int unaligned;
90 ptrdiff_t linesize1[4];
91 size_t size[4];
92
93 6669 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 13305 ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
99
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13305 if (ret < 0)
100 goto fail;
101 // increase alignment of w for next try (rhs gives the lowest bit set in w)
102 13305 w += w & ~(w - 1);
103
104 13305 unaligned = 0;
105
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66525 for (i = 0; i < 4; i++)
106 53220 unaligned |= linesize[i] % pool->stride_align[i];
107
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13305 } while (unaligned);
108
109
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33345 for (i = 0; i < 4; i++)
110 26676 linesize1[i] = linesize[i];
111 6669 ret = av_image_fill_plane_sizes(size, avctx->pix_fmt, h, linesize1);
112
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6669 if (ret < 0)
113 goto fail;
114
115
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33345 for (i = 0; i < 4; i++) {
116 26676 pool->linesize[i] = linesize[i];
117
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26676 if (size[i]) {
118
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18466 if (size[i] > INT_MAX - (16 + STRIDE_ALIGN - 1)) {
119 ret = AVERROR(EINVAL);
120 goto fail;
121 }
122 18466 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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18466 if (!pool->pools[i]) {
127 ret = AVERROR(ENOMEM);
128 goto fail;
129 }
130 }
131 }
132 6669 pool->format = frame->format;
133 6669 pool->width = frame->width;
134 6669 pool->height = frame->height;
135
136 6669 break;
137 }
138 8263 case AVMEDIA_TYPE_AUDIO: {
139 8263 ret = av_samples_get_buffer_size(&pool->linesize[0],
140 frame->ch_layout.nb_channels,
141 8263 frame->nb_samples, frame->format, 0);
142
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8263 if (ret < 0)
143 goto fail;
144
145 8263 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
146
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8263 if (!pool->pools[0]) {
147 ret = AVERROR(ENOMEM);
148 goto fail;
149 }
150
151 8263 pool->format = frame->format;
152 8263 pool->channels = frame->ch_layout.nb_channels;
153 8263 pool->samples = frame->nb_samples;
154
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8263 pool->planes = av_sample_fmt_is_planar(pool->format) ? pool->channels : 1;
155 8263 break;
156 }
157 default: av_assert0(0);
158 }
159
160 14932 ff_refstruct_unref(&avctx->internal->pool);
161 14932 avctx->internal->pool = pool;
162
163 14932 return 0;
164 fail:
165 ff_refstruct_unref(&pool);
166 return ret;
167 }
168
169 260956 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
170 {
171 260956 FramePool *pool = avctx->internal->pool;
172 260956 int planes = pool->planes;
173 int i;
174
175 260956 frame->linesize[0] = pool->linesize[0];
176
177
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260956 if (planes > AV_NUM_DATA_POINTERS) {
178 frame->extended_data = av_calloc(planes, sizeof(*frame->extended_data));
179 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
180 frame->extended_buf = av_calloc(frame->nb_extended_buf,
181 sizeof(*frame->extended_buf));
182 if (!frame->extended_data || !frame->extended_buf) {
183 av_freep(&frame->extended_data);
184 av_freep(&frame->extended_buf);
185 return AVERROR(ENOMEM);
186 }
187 } else {
188 260956 frame->extended_data = frame->data;
189
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260956 av_assert0(frame->nb_extended_buf == 0);
190 }
191
192
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669051 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
193 408095 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
194
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408095 if (!frame->buf[i])
195 goto fail;
196 408095 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
197 }
198
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260956 for (i = 0; i < frame->nb_extended_buf; i++) {
199 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
200 if (!frame->extended_buf[i])
201 goto fail;
202 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
203 }
204
205
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260956 if (avctx->debug & FF_DEBUG_BUFFERS)
206 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
207
208 260956 return 0;
209 fail:
210 av_frame_unref(frame);
211 return AVERROR(ENOMEM);
212 }
213
214 121216 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
215 {
216 121216 FramePool *pool = s->internal->pool;
217 int i;
218
219
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121216 if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
220 av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
221 return -1;
222 }
223
224 121216 memset(pic->data, 0, sizeof(pic->data));
225 121216 pic->extended_data = pic->data;
226
227
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463575 for (i = 0; i < 4 && pool->pools[i]; i++) {
228 342359 pic->linesize[i] = pool->linesize[i];
229
230 342359 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
231
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342359 if (!pic->buf[i])
232 goto fail;
233
234 342359 pic->data[i] = pic->buf[i]->data;
235 }
236
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748585 for (; i < AV_NUM_DATA_POINTERS; i++) {
237 627369 pic->data[i] = NULL;
238 627369 pic->linesize[i] = 0;
239 }
240
241
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121216 if (s->debug & FF_DEBUG_BUFFERS)
242 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
243
244 121216 return 0;
245 fail:
246 av_frame_unref(pic);
247 return AVERROR(ENOMEM);
248 }
249
250 382172 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
251 {
252 int ret;
253
254
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382172 if (avctx->hw_frames_ctx) {
255 ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
256 if (ret == AVERROR(ENOMEM)) {
257 AVHWFramesContext *frames_ctx =
258 (AVHWFramesContext*)avctx->hw_frames_ctx->data;
259 if (frames_ctx->initial_pool_size > 0 &&
260 !avctx->internal->warned_on_failed_allocation_from_fixed_pool) {
261 av_log(avctx, AV_LOG_WARNING, "Failed to allocate a %s/%s "
262 "frame from a fixed pool of hardware frames.\n",
263 av_get_pix_fmt_name(frames_ctx->format),
264 av_get_pix_fmt_name(frames_ctx->sw_format));
265 av_log(avctx, AV_LOG_WARNING, "Consider setting "
266 "extra_hw_frames to a larger value "
267 "(currently set to %d, giving a pool size of %d).\n",
268 avctx->extra_hw_frames, frames_ctx->initial_pool_size);
269 avctx->internal->warned_on_failed_allocation_from_fixed_pool = 1;
270 }
271 }
272 frame->width = avctx->coded_width;
273 frame->height = avctx->coded_height;
274 return ret;
275 }
276
277
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382172 if ((ret = update_frame_pool(avctx, frame)) < 0)
278 return ret;
279
280
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382172 switch (avctx->codec_type) {
281 121216 case AVMEDIA_TYPE_VIDEO:
282 121216 return video_get_buffer(avctx, frame);
283 260956 case AVMEDIA_TYPE_AUDIO:
284 260956 return audio_get_buffer(avctx, frame);
285 default:
286 return -1;
287 }
288 }
289