FFmpeg  4.4.6
api-band-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  * draw_horiz_band test.
25  */
26 
27 #include "libavutil/adler32.h"
28 #include "libavcodec/avcodec.h"
29 #include "libavformat/avformat.h"
30 #include "libavutil/imgutils.h"
31 
35 
36 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 
46 
47  pix_fmt_desc = av_pix_fmt_desc_get(ctx->pix_fmt);
48  chroma_w = -((-ctx->width) >> pix_fmt_desc->log2_chroma_w);
49  chroma_h = -((-height) >> pix_fmt_desc->log2_chroma_h);
50  shift_slice_position = -((-slice_position) >> pix_fmt_desc->log2_chroma_h);
51  shift_height = -((-ctx->height) >> pix_fmt_desc->log2_chroma_h);
52 
53  for (i = 0; i < height; i++) {
54  memcpy(slice_byte_buffer + ctx->width * slice_position + i * ctx->width,
55  fr->data[0] + offset[0] + i * fr->linesize[0], ctx->width);
56  }
57  for (i = 0; i < chroma_h; i++) {
58  memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_slice_position + i * chroma_w,
59  fr->data[1] + offset[1] + i * fr->linesize[1], chroma_w);
60  }
61  for (i = 0; i < chroma_h; i++) {
62  memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_height + chroma_w * shift_slice_position + i * chroma_w,
63  fr->data[2] + offset[2] + i * fr->linesize[2], chroma_w);
64  }
65 }
66 
67 static int video_decode(const char *input_filename)
68 {
69  AVCodec *codec = NULL;
71  AVCodecParameters *origin_par = NULL;
72  uint8_t *byte_buffer = NULL;
73  AVFrame *fr = NULL;
74  AVPacket *pkt;
76  int number_of_written_bytes;
77  int video_stream;
78  int byte_buffer_size;
79  int result;
80 
82 
84  if (result < 0) {
85  av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
86  return result;
87  }
88 
90  if (result < 0) {
91  av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
92  return result;
93  }
94 
96  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  origin_par = fmt_ctx->streams[video_stream]->codecpar;
102 
103  codec = avcodec_find_decoder(origin_par->codec_id);
104  if (!codec) {
105  av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
106  return -1;
107  }
108 
109  ctx = avcodec_alloc_context3(codec);
110  if (!ctx) {
111  av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
112  return AVERROR(ENOMEM);
113  }
114 
115  result = avcodec_parameters_to_context(ctx, origin_par);
116  if (result) {
117  av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
118  return result;
119  }
120 
121  ctx->draw_horiz_band = draw_horiz_band;
122  ctx->thread_count = 1;
123 
124  result = avcodec_open2(ctx, codec, NULL);
125  if (result < 0) {
126  av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
127  return result;
128  }
129 
130  fr = av_frame_alloc();
131  if (!fr) {
132  av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
133  return AVERROR(ENOMEM);
134  }
135 
136  pkt = av_packet_alloc();
137  if (!pkt) {
138  av_log(NULL, AV_LOG_ERROR, "Cannot allocate packet\n");
139  return AVERROR(ENOMEM);
140  }
141 
142  if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {
143  av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");
144  return -1;
145  }
146 
147  byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
148  byte_buffer = av_malloc(byte_buffer_size);
149  if (!byte_buffer) {
150  av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
151  return AVERROR(ENOMEM);
152  }
153 
154  slice_byte_buffer = av_malloc(byte_buffer_size);
155  if (!slice_byte_buffer) {
156  av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
157  return AVERROR(ENOMEM);
158  }
159  memset(slice_byte_buffer, 0, byte_buffer_size);
160  slice_byte_buffer_size = byte_buffer_size;
161 
162  result = 0;
163  while (result >= 0) {
164  result = av_read_frame(fmt_ctx, pkt);
165  if (result >= 0 && pkt->stream_index != video_stream) {
167  continue;
168  }
169 
170  // pkt will be empty on read error/EOF
171  result = avcodec_send_packet(ctx, pkt);
172 
174 
175  if (result < 0) {
176  av_log(NULL, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
177  return result;
178  }
179 
180  while (result >= 0) {
181  result = avcodec_receive_frame(ctx, fr);
182  if (result == AVERROR_EOF)
183  goto finish;
184  else if (result == AVERROR(EAGAIN)) {
185  result = 0;
186  break;
187  } else if (result < 0) {
188  av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
189  return result;
190  }
191 
192  number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
193  (const uint8_t* const *)fr->data, (const int*) fr->linesize,
194  ctx->pix_fmt, ctx->width, ctx->height, 1);
195  if (number_of_written_bytes < 0) {
196  av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
197  return number_of_written_bytes;
198  }
199  if (draw_horiz_band_called == 0) {
200  av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
201  return -1;
202  }
203  if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
204  av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
205  av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
206  return -1;
207  }
208  av_frame_unref(fr);
209  }
210  }
211 
212 finish:
214  av_frame_free(&fr);
217  av_freep(&byte_buffer);
219  return 0;
220 }
221 
222 int main(int argc, char **argv)
223 {
224  if (argc < 2)
225  {
226  av_log(NULL, AV_LOG_ERROR, "Incorrect input: expected %s <name of a video file>\nNote that test works only for huffyuv, flv and mpeg4 decoders\n", argv[0]);
227  return 1;
228  }
229 
230  if (video_decode(argv[1]) != 0)
231  return 1;
232 
233  return 0;
234 }
Public header for Adler-32 hash function implementation.
uint8_t * slice_byte_buffer
draw_horiz_band test.
Definition: api-band-test.c:32
int draw_horiz_band_called
Definition: api-band-test.c:34
static int video_decode(const char *input_filename)
Definition: api-band-test.c:67
int main(int argc, char **argv)
static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4], int slice_position, int type, int height)
Definition: api-band-test.c:36
uint8_t slice_byte_buffer_size
Definition: api-band-test.c:33
uint8_t
Libavcodec external API header.
Main libavformat public API header.
#define NULL
Definition: coverity.c:32
static AVFormatContext * fmt_ctx
static AVStream * video_stream
static const char * input_filename
Definition: ffplay.c:312
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:144
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:946
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: codec_par.c:147
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:173
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:188
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
Definition: decode.c:652
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:589
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1741
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:4230
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3602
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4481
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:512
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:45
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:466
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:505
cl_device_type type
misc image utilities
int i
Definition: input.c:407
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
main external API structure.
Definition: avcodec.h:536
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
Format I/O context.
Definition: avformat.h:1232
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
static void finish(void)
Definition: movenc.c:342
#define height
static const uint8_t offset[127][2]
Definition: vf_spp.c:107