2 * Copyright (c) 2015 Ludmila Glinskih
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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
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19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * draw_horiz_band test.
27 #include "libavutil/adler32.h"
28 #include "libavcodec/avcodec.h"
29 #include "libavformat/avformat.h"
30 #include "libavutil/imgutils.h"
32 uint8_t *slice_byte_buffer;
33 uint8_t slice_byte_buffer_size;
34 int draw_horiz_band_called;
36 static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4],
37 int slice_position, int type, int height)
40 const AVPixFmtDescriptor *pix_fmt_desc;
41 int chroma_w, chroma_h;
42 int shift_slice_position;
45 draw_horiz_band_called = 1;
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);
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);
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);
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);
67 static int video_decode(const char *input_filename)
69 AVCodec *codec = NULL;
70 AVCodecContext *origin_ctx = NULL, *ctx= NULL;
71 uint8_t *byte_buffer = NULL;
74 AVFormatContext *fmt_ctx = NULL;
75 int number_of_written_bytes;
80 int end_of_stream = 0;
82 draw_horiz_band_called = 0;
84 result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
86 av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
90 result = avformat_find_stream_info(fmt_ctx, NULL);
92 av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
96 video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
97 if (video_stream < 0) {
98 av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
102 origin_ctx = fmt_ctx->streams[video_stream]->codec;
104 codec = avcodec_find_decoder(origin_ctx->codec_id);
106 av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
110 ctx = avcodec_alloc_context3(codec);
112 av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
113 return AVERROR(ENOMEM);
116 result = avcodec_copy_context(ctx, origin_ctx);
118 av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
122 ctx->draw_horiz_band = draw_horiz_band;
123 ctx->thread_count = 1;
125 result = avcodec_open2(ctx, codec, NULL);
127 av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
131 fr = av_frame_alloc();
133 av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
134 return AVERROR(ENOMEM);
137 if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {
138 av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");
142 byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
143 byte_buffer = av_malloc(byte_buffer_size);
145 av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
146 return AVERROR(ENOMEM);
149 slice_byte_buffer = av_malloc(byte_buffer_size);
150 if (!slice_byte_buffer) {
151 av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
152 return AVERROR(ENOMEM);
154 memset(slice_byte_buffer, 0, byte_buffer_size);
155 slice_byte_buffer_size = byte_buffer_size;
157 av_init_packet(&pkt);
159 if (!end_of_stream) {
160 if (av_read_frame(fmt_ctx, &pkt) < 0) {
168 if (pkt.stream_index == video_stream || end_of_stream) {
170 result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
172 av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
176 number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
177 (const uint8_t* const *)fr->data, (const int*) fr->linesize,
178 ctx->pix_fmt, ctx->width, ctx->height, 1);
179 if (number_of_written_bytes < 0) {
180 av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
181 return number_of_written_bytes;
183 if (draw_horiz_band_called == 0) {
184 av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
187 if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
188 av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
189 av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
193 av_packet_unref(&pkt);
194 av_init_packet(&pkt);
196 } while (!end_of_stream || got_frame);
198 av_packet_unref(&pkt);
201 avformat_close_input(&fmt_ctx);
202 avcodec_free_context(&ctx);
203 av_freep(&byte_buffer);
204 av_freep(&slice_byte_buffer);
208 int main(int argc, char **argv)
212 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]);
218 if (video_decode(argv[1]) != 0)