FFmpeg
api-seek-test.c
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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;
36 
37 static int add_crc_to_array(uint32_t crc, int64_t pts)
38 {
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  }
53  return 0;
54 }
55 
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 
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  }
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 
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 
174 static int seek_test(const char *input_filename, const char *start, const char *end)
175 {
176  AVCodec *codec = NULL;
178  AVCodecParameters *origin_par = NULL;
179  AVFrame *fr = 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:
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 
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 }
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
#define av_realloc_f(p, o, n)
int av_image_copy_to_buffer(uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
Copy image data from an image into a buffer.
Definition: imgutils.c:453
static int compare_crc_in_array(uint32_t crc, int64_t pts)
Definition: api-seek-test.c:56
misc image utilities
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2513
static AVFormatContext * fmt_ctx
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3968
int size
Definition: avcodec.h:1481
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1778
static AVStream * video_stream
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:539
int number_of_elements
Definition: api-seek-test.c:35
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3492
static int add_crc_to_array(uint32_t crc, int64_t pts)
Definition: api-seek-test.c:37
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3960
Format I/O context.
Definition: avformat.h:1358
uint8_t
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len)
Calculate the Adler32 checksum of a buffer.
Definition: adler32.c:44
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: utils.c:2110
uint8_t * data
Definition: avcodec.h:1480
uint32_t crc
Definition: hash.c:60
static int seek_test(const char *input_filename, const char *start, const char *end)
int size_of_array
Definition: api-seek-test.c:34
#define av_log(a,...)
int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)
Find the "best" stream in the file.
Definition: utils.c:4226
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: utils.c:1095
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters...
Definition: imgutils.c:431
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
static long int read_seek_range(const char *string_with_number)
uint32_t * crc_array
Definition: api-seek-test.c:33
static int 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)
Definition: api-seek-test.c:75
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
int width
picture width / height.
Definition: avcodec.h:1741
AVFormatContext * ctx
Definition: movenc.c:48
static const char * input_filename
Definition: ffplay.c:311
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal decoder state / flush internal buffers.
Definition: decode.c:2031
Public header for Adler-32 hash function implementation.
Libavcodec external API header.
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:574
attribute_deprecated int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)
Decode the video frame of size avpkt->size from avpkt->data into picture.
Definition: decode.c:897
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer...
Definition: options.c:171
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
main external API structure.
Definition: avcodec.h:1568
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:894
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:548
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1777
static int64_t pts
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2522
Main libavformat public API header.
int64_t * pts_array
Seek test.
Definition: api-seek-test.c:32
static int FUNC() end_of_stream(CodedBitstreamContext *ctx, RWContext *rw, H264RawNALUnitHeader *current)
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3600
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4471
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
int main(int argc, char **argv)
printf("static const uint8_t my_array[100] = {\n")
and forward the result(frame or status change) to the corresponding input.If nothing is possible
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:766
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int stream_index
Definition: avcodec.h:1482
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
Definition: avcodec.h:1457
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1473
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248