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) {
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 
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  }
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  }
148  } while ((!end_of_stream || got_frame) && (no_seeking || (fr->pts + fr->pkt_duration <= ts_end)));
149 
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 
192  if (result < 0) {
193  av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
194  return result;
195  }
196 
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
212  if (video_stream < 0) {
213  av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
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");
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 
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 
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) {
260  if (result != 0)
261  break;
262  }
263  }
264 
265 end:
268  av_frame_free(&fr);
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 }
number_of_elements
int number_of_elements
Definition: api-seek-test.c:35
compare_crc_in_array
static int compare_crc_in_array(uint32_t crc, int64_t pts)
Definition: api-seek-test.c:56
avcodec_close
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:1143
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
AVCodec
AVCodec.
Definition: codec.h:190
AVHashContext::crc
uint32_t crc
Definition: hash.c:60
AVERROR
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
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1403
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
AVPacket::data
uint8_t * data
Definition: packet.h:355
AVFrame::pkt_duration
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown.
Definition: frame.h:579
av_read_frame
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1780
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
avformat_close_input
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4498
add_crc_to_array
static int add_crc_to_array(uint32_t crc, int64_t pts)
Definition: api-seek-test.c:37
AVSEEK_FLAG_ANY
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2498
pts
static int64_t pts
Definition: transcode_aac.c:647
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:157
av_seek_frame
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2527
read_seek_range
static long int read_seek_range(const char *string_with_number)
Definition: api-seek-test.c:156
crc_array
uint32_t * crc_array
Definition: api-seek-test.c:33
size_of_array
int size_of_array
Definition: api-seek-test.c:34
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
av_realloc_f
#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:33
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1012
result
and forward the result(frame or status change) to the corresponding input. If nothing is possible
NULL
#define NULL
Definition: coverity.c:32
fmt_ctx
static AVFormatContext * fmt_ctx
Definition: demuxing_decoding.c:37
avcodec_free_context
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:172
seek_test
static int seek_test(const char *input_filename, const char *start, const char *end)
Definition: api-seek-test.c:174
end_of_stream
static int FUNC() end_of_stream(CodedBitstreamContext *ctx, RWContext *rw, H264RawNALUnitHeader *current)
Definition: cbs_h264_syntax_template.c:1419
adler32.h
avcodec_open2
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:565
avformat_find_stream_info
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3622
AVPacket::size
int size
Definition: packet.h:356
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
printf
printf("static const uint8_t my_array[100] = {\n")
av_image_get_buffer_size
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
compute_crc_of_packets
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
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
avformat_open_input
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:536
avcodec_parameters_to_context
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:2184
avcodec_decode_video2
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:806
uint8_t
uint8_t
Definition: audio_convert.c:194
avcodec.h
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: utils.c:1080
video_stream
static AVStream * video_stream
Definition: demuxing_decoding.c:41
avcodec_find_decoder
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:919
avformat.h
AVCodecContext
main external API structure.
Definition: avcodec.h:526
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
av_adler32_update
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
AVPacket::stream_index
int stream_index
Definition: packet.h:357
input_filename
static const char * input_filename
Definition: ffplay.c:312
AVERROR_DECODER_NOT_FOUND
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_image_copy_to_buffer
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
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:332
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
main
int main(int argc, char **argv)
Definition: api-seek-test.c:275
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
pts_array
int64_t * pts_array
Seek test.
Definition: api-seek-test.c:32
av_init_packet
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
av_find_best_stream
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:4251