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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 got_frame = 0;
79  int byte_buffer_size;
80  int result;
81  int end_of_stream = 0;
82 
84 
85  result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
86  if (result < 0) {
87  av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
88  return result;
89  }
90 
91  result = avformat_find_stream_info(fmt_ctx, NULL);
92  if (result < 0) {
93  av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
94  return result;
95  }
96 
97  video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
98  if (video_stream < 0) {
99  av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
100  return -1;
101  }
102 
103  origin_par = fmt_ctx->streams[video_stream]->codecpar;
104 
105  codec = avcodec_find_decoder(origin_par->codec_id);
106  if (!codec) {
107  av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
108  return -1;
109  }
110 
111  ctx = avcodec_alloc_context3(codec);
112  if (!ctx) {
113  av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
114  return AVERROR(ENOMEM);
115  }
116 
117  result = avcodec_parameters_to_context(ctx, origin_par);
118  if (result) {
119  av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
120  return result;
121  }
122 
124  ctx->thread_count = 1;
125 
126  result = avcodec_open2(ctx, codec, NULL);
127  if (result < 0) {
128  av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
129  return result;
130  }
131 
132  fr = av_frame_alloc();
133  if (!fr) {
134  av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
135  return AVERROR(ENOMEM);
136  }
137 
138  if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {
139  av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");
140  return -1;
141  }
142 
143  byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
144  byte_buffer = av_malloc(byte_buffer_size);
145  if (!byte_buffer) {
146  av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
147  return AVERROR(ENOMEM);
148  }
149 
150  slice_byte_buffer = av_malloc(byte_buffer_size);
151  if (!slice_byte_buffer) {
152  av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
153  return AVERROR(ENOMEM);
154  }
155  memset(slice_byte_buffer, 0, byte_buffer_size);
156  slice_byte_buffer_size = byte_buffer_size;
157 
158  av_init_packet(&pkt);
159  do {
160  if (!end_of_stream) {
161  if (av_read_frame(fmt_ctx, &pkt) < 0) {
162  end_of_stream = 1;
163  }
164  }
165  if (end_of_stream) {
166  pkt.data = NULL;
167  pkt.size = 0;
168  }
169  if (pkt.stream_index == video_stream || end_of_stream) {
170  got_frame = 0;
171  result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
172  if (result < 0) {
173  av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
174  return result;
175  }
176  if (got_frame) {
177  number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
178  (const uint8_t* const *)fr->data, (const int*) fr->linesize,
179  ctx->pix_fmt, ctx->width, ctx->height, 1);
180  if (number_of_written_bytes < 0) {
181  av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
182  return number_of_written_bytes;
183  }
184  if (draw_horiz_band_called == 0) {
185  av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
186  return -1;
187  }
188  if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
189  av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
190  av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
191  return -1;
192  }
193  }
194  av_packet_unref(&pkt);
195  av_init_packet(&pkt);
196  }
197  } while (!end_of_stream || got_frame);
198 
199  av_packet_unref(&pkt);
200  av_frame_free(&fr);
201  avcodec_close(ctx);
202  avformat_close_input(&fmt_ctx);
203  avcodec_free_context(&ctx);
204  av_freep(&byte_buffer);
206  return 0;
207 }
208 
209 int main(int argc, char **argv)
210 {
211  if (argc < 2)
212  {
213  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]);
214  return 1;
215  }
216 
217  if (video_decode(argv[1]) != 0)
218  return 1;
219 
220  return 0;
221 }
#define NULL
Definition: coverity.c:32
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2363
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
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
misc image utilities
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
static AVFormatContext * fmt_ctx
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int size
Definition: avcodec.h:1431
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1727
static AVStream * video_stream
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3408
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
static int video_decode(const char *input_filename)
Definition: api-band-test.c:67
Format I/O context.
Definition: avformat.h:1342
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
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
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
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:2078
#define height
uint8_t * data
Definition: avcodec.h:1430
#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:4178
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:1061
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 AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
int main(int argc, char **argv)
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
uint8_t slice_byte_buffer_size
Definition: api-band-test.c:33
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band...
Definition: avcodec.h:1752
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:1690
AVFormatContext * ctx
Definition: movenc.c:48
static const char * input_filename
Definition: ffplay.c:311
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2769
uint8_t * slice_byte_buffer
draw_horiz_band test.
Definition: api-band-test.c:32
Public header for Adler-32 hash function implementation.
Libavcodec external API header.
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:826
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:249
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int draw_horiz_band_called
Definition: api-band-test.c:34
main external API structure.
Definition: avcodec.h:1518
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:862
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
GLint GLenum type
Definition: opengl_enc.c:105
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:538
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1767
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
Main libavformat public API header.
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3559
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:4422
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:537
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
int stream_index
Definition: avcodec.h:1432
This structure stores compressed data.
Definition: avcodec.h:1407