FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/tests/api/api-band-test.c
Date: 2026-04-24 15:23:18
Exec Total Coverage
Lines: 87 127 68.5%
Functions: 3 3 100.0%
Branches: 34 56 60.7%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2015 Ludmila Glinskih
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23 /**
24 * draw_horiz_band test.
25 */
26
27 #include "libavutil/adler32.h"
28 #include "libavutil/mem.h"
29 #include "libavcodec/avcodec.h"
30 #include "libavformat/avformat.h"
31 #include "libavutil/imgutils.h"
32
33 uint8_t *slice_byte_buffer;
34 int draw_horiz_band_called;
35
36 3350 static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4],
37 int slice_position, int type, int height)
38 {
39 int i;
40 const AVPixFmtDescriptor *pix_fmt_desc;
41 int chroma_w, chroma_h;
42 int shift_slice_position;
43 int shift_height;
44
45 3350 draw_horiz_band_called = 1;
46
47 3350 pix_fmt_desc = av_pix_fmt_desc_get(ctx->pix_fmt);
48 3350 chroma_w = -((-ctx->width) >> pix_fmt_desc->log2_chroma_w);
49 3350 chroma_h = -((-height) >> pix_fmt_desc->log2_chroma_h);
50 3350 shift_slice_position = -((-slice_position) >> pix_fmt_desc->log2_chroma_h);
51 3350 shift_height = -((-ctx->height) >> pix_fmt_desc->log2_chroma_h);
52
53
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 56750 for (i = 0; i < height; i++) {
54 53400 memcpy(slice_byte_buffer + ctx->width * slice_position + i * ctx->width,
55 53400 fr->data[0] + offset[0] + i * fr->linesize[0], ctx->width);
56 }
57
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 30050 for (i = 0; i < chroma_h; i++) {
58 26700 memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_slice_position + i * chroma_w,
59 26700 fr->data[1] + offset[1] + i * fr->linesize[1], chroma_w);
60 }
61
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 30050 for (i = 0; i < chroma_h; i++) {
62 26700 memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_height + chroma_w * shift_slice_position + i * chroma_w,
63 26700 fr->data[2] + offset[2] + i * fr->linesize[2], chroma_w);
64 }
65 3350 }
66
67 1 static int video_decode(const char *input_filename)
68 {
69 1 const AVCodec *codec = NULL;
70 1 AVCodecContext *ctx= NULL;
71 1 AVCodecParameters *origin_par = NULL;
72 1 uint8_t *byte_buffer = NULL;
73 1 AVFrame *fr = NULL;
74 AVPacket *pkt;
75 1 AVFormatContext *fmt_ctx = NULL;
76 int number_of_written_bytes;
77 int video_stream;
78 int byte_buffer_size;
79 int result;
80
81 1 draw_horiz_band_called = 0;
82
83 1 result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
84
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 1 if (result < 0) {
85 ✗ av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
86 ✗ return result;
87 }
88
89 1 result = avformat_find_stream_info(fmt_ctx, NULL);
90
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 1 if (result < 0) {
91 ✗ av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
92 ✗ return result;
93 }
94
95 1 video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
96
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 1 if (video_stream < 0) {
97 ✗ av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
98 ✗ return -1;
99 }
100
101 1 origin_par = fmt_ctx->streams[video_stream]->codecpar;
102
103 1 codec = avcodec_find_decoder(origin_par->codec_id);
104
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 1 if (!codec) {
105 ✗ av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
106 ✗ return -1;
107 }
108
109
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 1 if (!(codec->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)) {
110 ✗ av_log(NULL, AV_LOG_ERROR, "Codec does not support draw_horiz_band\n");
111 ✗ return -1;
112 }
113
114 1 ctx = avcodec_alloc_context3(codec);
115
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 1 if (!ctx) {
116 ✗ av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
117 ✗ return AVERROR(ENOMEM);
118 }
119
120 1 result = avcodec_parameters_to_context(ctx, origin_par);
121
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 1 if (result) {
122 ✗ av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
123 ✗ return result;
124 }
125
126 1 ctx->draw_horiz_band = draw_horiz_band;
127 1 ctx->thread_count = 1;
128
129 1 result = avcodec_open2(ctx, codec, NULL);
130
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 1 if (result < 0) {
131 ✗ av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
132 ✗ return result;
133 }
134
135 1 fr = av_frame_alloc();
136
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 1 if (!fr) {
137 ✗ av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
138 ✗ return AVERROR(ENOMEM);
139 }
140
141 1 pkt = av_packet_alloc();
142
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 1 if (!pkt) {
143 ✗ av_log(NULL, AV_LOG_ERROR, "Cannot allocate packet\n");
144 ✗ return AVERROR(ENOMEM);
145 }
146
147 1 byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
148 1 byte_buffer = av_malloc(byte_buffer_size);
149
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 1 if (!byte_buffer) {
150 ✗ av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
151 ✗ return AVERROR(ENOMEM);
152 }
153
154 1 slice_byte_buffer = av_malloc(byte_buffer_size);
155
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 1 if (!slice_byte_buffer) {
156 ✗ av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
157 ✗ return AVERROR(ENOMEM);
158 }
159 1 memset(slice_byte_buffer, 0, byte_buffer_size);
160
161 1 result = 0;
162
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 151 while (result >= 0) {
163 151 result = av_read_frame(fmt_ctx, pkt);
164
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 151 if (result >= 0 && pkt->stream_index != video_stream) {
165 ✗ av_packet_unref(pkt);
166 ✗ continue;
167 }
168
169 // pkt will be empty on read error/EOF
170 151 result = avcodec_send_packet(ctx, pkt);
171
172 151 av_packet_unref(pkt);
173
174
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 151 if (result < 0) {
175 ✗ av_log(NULL, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
176 ✗ return result;
177 }
178
179
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 301 while (result >= 0) {
180 301 result = avcodec_receive_frame(ctx, fr);
181
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 301 if (result == AVERROR_EOF)
182 1 goto finish;
183
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 300 else if (result == AVERROR(EAGAIN)) {
184 150 result = 0;
185 150 break;
186
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 150 } else if (result < 0) {
187 ✗ av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
188 ✗ return result;
189 }
190
191 150 number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
192 150 (const uint8_t* const *)fr->data, (const int*) fr->linesize,
193 150 ctx->pix_fmt, ctx->width, ctx->height, 1);
194
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 150 if (number_of_written_bytes < 0) {
195 ✗ av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
196 ✗ return number_of_written_bytes;
197 }
198
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 150 if (draw_horiz_band_called == 0) {
199 ✗ av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
200 ✗ return -1;
201 }
202 150 if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
203
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 150 av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
204 ✗ av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
205 ✗ return -1;
206 }
207 150 av_frame_unref(fr);
208 }
209 }
210
211 ✗ finish:
212 1 av_packet_free(&pkt);
213 1 av_frame_free(&fr);
214 1 avformat_close_input(&fmt_ctx);
215 1 avcodec_free_context(&ctx);
216 1 av_freep(&byte_buffer);
217 1 av_freep(&slice_byte_buffer);
218 1 return 0;
219 }
220
221 1 int main(int argc, char **argv)
222 {
223
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 1 if (argc < 2)
224 {
225 ✗ av_log(NULL, AV_LOG_ERROR, "Incorrect input: expected %s <name of a video file>\n", argv[0]);
226 ✗ return 1;
227 }
228
229
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 1 if (video_decode(argv[1]) != 0)
230 ✗ return 1;
231
232 1 return 0;
233 }
234