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 * Seek test.
25 */
26
27 #include "libavutil/adler32.h"
28 #include "libavcodec/avcodec.h"
29 #include "libavformat/avformat.h"
30 #include "libavutil/imgutils.h"
31
32 int64_t *pts_array;
33 uint32_t *crc_array;
34 int size_of_array;
35 int number_of_elements;
36
add_crc_to_array(uint32_t crc,int64_t pts)37 static int add_crc_to_array(uint32_t crc, int64_t pts)
38 {
39 if (size_of_array <= number_of_elements) {
40 if (size_of_array == 0)
41 size_of_array = 10;
42 size_of_array *= 2;
43 crc_array = av_realloc_f(crc_array, size_of_array, sizeof(uint32_t));
44 pts_array = av_realloc_f(pts_array, size_of_array, sizeof(int64_t));
45 if ((crc_array == NULL) || (pts_array == NULL)) {
46 av_log(NULL, AV_LOG_ERROR, "Can't allocate array to store crcs\n");
47 return AVERROR(ENOMEM);
48 }
49 }
50 crc_array[number_of_elements] = crc;
51 pts_array[number_of_elements] = pts;
52 number_of_elements++;
53 return 0;
54 }
55
compare_crc_in_array(uint32_t crc,int64_t pts)56 static int compare_crc_in_array(uint32_t crc, int64_t pts)
57 {
58 int i;
59 for (i = 0; i < number_of_elements; i++) {
60 if (pts_array[i] == pts) {
61 if (crc_array[i] == crc) {
62 printf("Comparing 0x%08"PRIx32" %"PRId64" %d is OK\n", crc, pts, i);
63 return 0;
64 }
65 else {
66 av_log(NULL, AV_LOG_ERROR, "Incorrect crc of a frame after seeking\n");
67 return -1;
68 }
69 }
70 }
71 av_log(NULL, AV_LOG_ERROR, "Incorrect pts of a frame after seeking\n");
72 return -1;
73 }
74
compute_crc_of_packets(AVFormatContext * fmt_ctx,int video_stream,AVCodecContext * ctx,AVFrame * fr,uint64_t ts_start,uint64_t ts_end,int no_seeking)75 static int compute_crc_of_packets(AVFormatContext *fmt_ctx, int video_stream,
76 AVCodecContext *ctx, AVFrame *fr, uint64_t ts_start, uint64_t ts_end, int no_seeking)
77 {
78 int number_of_written_bytes;
79 int got_frame = 0;
80 int result;
81 int end_of_stream = 0;
82 int byte_buffer_size;
83 uint8_t *byte_buffer;
84 uint32_t crc;
85 AVPacket pkt;
86
87 byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16);
88 byte_buffer = av_malloc(byte_buffer_size);
89 if (!byte_buffer) {
90 av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
91 return AVERROR(ENOMEM);
92 }
93
94 if (!no_seeking) {
95 result = av_seek_frame(fmt_ctx, video_stream, ts_start, AVSEEK_FLAG_ANY);
96 printf("Seeking to %"PRId64", computing crc for frames with pts < %"PRId64"\n", ts_start, ts_end);
97 if (result < 0) {
98 av_log(NULL, AV_LOG_ERROR, "Error in seeking\n");
99 return result;
100 }
101 avcodec_flush_buffers(ctx);
102 }
103
104 av_init_packet(&pkt);
105 do {
106 if (!end_of_stream)
107 if (av_read_frame(fmt_ctx, &pkt) < 0)
108 end_of_stream = 1;
109 if (end_of_stream) {
110 pkt.data = NULL;
111 pkt.size = 0;
112 }
113 if (pkt.stream_index == video_stream || end_of_stream) {
114 got_frame = 0;
115 if ((pkt.pts == AV_NOPTS_VALUE) && (!end_of_stream)) {
116 av_log(NULL, AV_LOG_ERROR, "Error: frames doesn't have pts values\n");
117 return -1;
118 }
119 result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
120 if (result < 0) {
121 av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
122 return result;
123 }
124 if (got_frame) {
125 number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
126 (const uint8_t* const *)fr->data, (const int*) fr->linesize,
127 ctx->pix_fmt, ctx->width, ctx->height, 1);
128 if (number_of_written_bytes < 0) {
129 av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
130 return number_of_written_bytes;
131 }
132 if ((!no_seeking) && (fr->pts > ts_end))
133 break;
134 crc = av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes);
135 printf("%10"PRId64", 0x%08"PRIx32"\n", fr->pts, crc);
136 if (no_seeking) {
137 if (add_crc_to_array(crc, fr->pts) < 0)
138 return -1;
139 }
140 else {
141 if (compare_crc_in_array(crc, fr->pts) < 0)
142 return -1;
143 }
144 }
145 }
146 av_packet_unref(&pkt);
147 av_init_packet(&pkt);
148 } while ((!end_of_stream || got_frame) && (no_seeking || (fr->pts + fr->pkt_duration <= ts_end)));
149
150 av_packet_unref(&pkt);
151 av_freep(&byte_buffer);
152
153 return 0;
154 }
155
read_seek_range(const char * string_with_number)156 static long int read_seek_range(const char *string_with_number)
157 {
158 long int number;
159 char *end_of_string = NULL;
160 number = strtol(string_with_number, &end_of_string, 10);
161 if ((strlen(string_with_number) != end_of_string - string_with_number) || (number < 0)) {
162 av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n");
163 return -1;
164 }
165 else if ((number == LONG_MAX) || (number == LONG_MIN)) {
166 if (errno == ERANGE) {
167 av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n");
168 return -1;
169 }
170 }
171 return number;
172 }
173
seek_test(const char * input_filename,const char * start,const char * end)174 static int seek_test(const char *input_filename, const char *start, const char *end)
175 {
176 AVCodec *codec = NULL;
177 AVCodecContext *ctx= NULL;
178 AVCodecParameters *origin_par = NULL;
179 AVFrame *fr = NULL;
180 AVFormatContext *fmt_ctx = NULL;
181 int video_stream;
182 int result;
183 int i, j;
184 long int start_ts, end_ts;
185
186 size_of_array = 0;
187 number_of_elements = 0;
188 crc_array = NULL;
189 pts_array = NULL;
190
191 result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
192 if (result < 0) {
193 av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
194 return result;
195 }
196
197 result = avformat_find_stream_info(fmt_ctx, NULL);
198 if (result < 0) {
199 av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
200 goto end;
201 }
202
203 start_ts = read_seek_range(start);
204 end_ts = read_seek_range(end);
205 if ((start_ts < 0) || (end_ts < 0)) {
206 result = -1;
207 goto end;
208 }
209
210 //TODO: add ability to work with audio format
211 video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
212 if (video_stream < 0) {
213 av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
214 result = video_stream;
215 goto end;
216 }
217
218 origin_par = fmt_ctx->streams[video_stream]->codecpar;
219
220 codec = avcodec_find_decoder(origin_par->codec_id);
221 if (!codec) {
222 av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
223 result = AVERROR_DECODER_NOT_FOUND;
224 goto end;
225 }
226
227 ctx = avcodec_alloc_context3(codec);
228 if (!ctx) {
229 av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
230 result = AVERROR(ENOMEM);
231 goto end;
232 }
233
234 result = avcodec_parameters_to_context(ctx, origin_par);
235 if (result) {
236 av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
237 goto end;
238 }
239
240 result = avcodec_open2(ctx, codec, NULL);
241 if (result < 0) {
242 av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
243 goto end;
244 }
245
246 fr = av_frame_alloc();
247 if (!fr) {
248 av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
249 result = AVERROR(ENOMEM);
250 goto end;
251 }
252
253 result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, 0, 0, 1);
254 if (result != 0)
255 goto end;
256
257 for (i = start_ts; i < end_ts; i += 100) {
258 for (j = i + 100; j < end_ts; j += 100) {
259 result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, i, j, 0);
260 if (result != 0)
261 break;
262 }
263 }
264
265 end:
266 av_freep(&crc_array);
267 av_freep(&pts_array);
268 av_frame_free(&fr);
269 avcodec_close(ctx);
270 avformat_close_input(&fmt_ctx);
271 avcodec_free_context(&ctx);
272 return result;
273 }
274
main(int argc,char ** argv)275 int main(int argc, char **argv)
276 {
277 if (argc < 4) {
278 av_log(NULL, AV_LOG_ERROR, "Incorrect input\n");
279 return 1;
280 }
281
282 if (seek_test(argv[1], argv[2], argv[3]) != 0)
283 return 1;
284
285 return 0;
286 }
287