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 *ctx= NULL;
71 AVCodecParameters *origin_par = NULL;
72 uint8_t *byte_buffer = NULL;
75 AVFormatContext *fmt_ctx = NULL;
76 int number_of_written_bytes;
81 int end_of_stream = 0;
83 draw_horiz_band_called = 0;
85 result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
87 av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
91 result = avformat_find_stream_info(fmt_ctx, NULL);
93 av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
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");
103 origin_par = fmt_ctx->streams[video_stream]->codecpar;
105 codec = avcodec_find_decoder(origin_par->codec_id);
107 av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
111 ctx = avcodec_alloc_context3(codec);
113 av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
114 return AVERROR(ENOMEM);
117 result = avcodec_parameters_to_context(ctx, origin_par);
119 av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
123 ctx->draw_horiz_band = draw_horiz_band;
124 ctx->thread_count = 1;
126 result = avcodec_open2(ctx, codec, NULL);
128 av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
132 fr = av_frame_alloc();
134 av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
135 return AVERROR(ENOMEM);
138 if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {
139 av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");
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);
146 av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
147 return AVERROR(ENOMEM);
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);
155 memset(slice_byte_buffer, 0, byte_buffer_size);
156 slice_byte_buffer_size = byte_buffer_size;
158 av_init_packet(&pkt);
160 if (!end_of_stream) {
161 if (av_read_frame(fmt_ctx, &pkt) < 0) {
169 if (pkt.stream_index == video_stream || end_of_stream) {
171 result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
173 av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
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;
184 if (draw_horiz_band_called == 0) {
185 av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
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");
194 av_packet_unref(&pkt);
195 av_init_packet(&pkt);
197 } while (!end_of_stream || got_frame);
199 av_packet_unref(&pkt);
202 avformat_close_input(&fmt_ctx);
203 avcodec_free_context(&ctx);
204 av_freep(&byte_buffer);
205 av_freep(&slice_byte_buffer);
209 int main(int argc, char **argv)
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]);
219 if (video_decode(argv[1]) != 0)