mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
223 lines
7.5 KiB
C
223 lines
7.5 KiB
C
/*
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* Copyright (c) 2015 Ludmila Glinskih
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* draw_horiz_band test.
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*/
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#include "libavutil/adler32.h"
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#include "libavcodec/avcodec.h"
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#include "libavformat/avformat.h"
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#include "libavutil/imgutils.h"
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uint8_t *slice_byte_buffer;
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uint8_t slice_byte_buffer_size;
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int draw_horiz_band_called;
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static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4],
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int slice_position, int type, int height)
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{
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int i;
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const AVPixFmtDescriptor *pix_fmt_desc;
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int chroma_w, chroma_h;
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int shift_slice_position;
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int shift_height;
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draw_horiz_band_called = 1;
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pix_fmt_desc = av_pix_fmt_desc_get(ctx->pix_fmt);
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chroma_w = -((-ctx->width) >> pix_fmt_desc->log2_chroma_w);
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chroma_h = -((-height) >> pix_fmt_desc->log2_chroma_h);
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shift_slice_position = -((-slice_position) >> pix_fmt_desc->log2_chroma_h);
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shift_height = -((-ctx->height) >> pix_fmt_desc->log2_chroma_h);
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for (i = 0; i < height; i++) {
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memcpy(slice_byte_buffer + ctx->width * slice_position + i * ctx->width,
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fr->data[0] + offset[0] + i * fr->linesize[0], ctx->width);
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}
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for (i = 0; i < chroma_h; i++) {
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memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_slice_position + i * chroma_w,
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fr->data[1] + offset[1] + i * fr->linesize[1], chroma_w);
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}
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for (i = 0; i < chroma_h; i++) {
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memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_height + chroma_w * shift_slice_position + i * chroma_w,
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fr->data[2] + offset[2] + i * fr->linesize[2], chroma_w);
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}
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}
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static int video_decode(const char *input_filename)
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{
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AVCodec *codec = NULL;
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AVCodecContext *origin_ctx = NULL, *ctx= NULL;
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uint8_t *byte_buffer = NULL;
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AVFrame *fr = NULL;
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AVPacket pkt;
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AVFormatContext *fmt_ctx = NULL;
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int number_of_written_bytes;
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int video_stream;
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int got_frame = 0;
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int byte_buffer_size;
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int result;
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int end_of_stream = 0;
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draw_horiz_band_called = 0;
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result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
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if (result < 0) {
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av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
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return result;
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}
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result = avformat_find_stream_info(fmt_ctx, NULL);
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if (result < 0) {
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av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
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return result;
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}
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video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
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if (video_stream < 0) {
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av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
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return -1;
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}
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origin_ctx = fmt_ctx->streams[video_stream]->codec;
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codec = avcodec_find_decoder(origin_ctx->codec_id);
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if (!codec) {
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av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
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return -1;
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}
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ctx = avcodec_alloc_context3(codec);
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if (!ctx) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
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return AVERROR(ENOMEM);
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}
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result = avcodec_copy_context(ctx, origin_ctx);
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if (result) {
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av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
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return result;
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}
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ctx->draw_horiz_band = draw_horiz_band;
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ctx->thread_count = 1;
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result = avcodec_open2(ctx, codec, NULL);
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if (result < 0) {
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av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
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return result;
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}
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fr = av_frame_alloc();
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if (!fr) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
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return AVERROR(ENOMEM);
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}
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if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {
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av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");
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return -1;
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}
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byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
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byte_buffer = av_malloc(byte_buffer_size);
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if (!byte_buffer) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
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return AVERROR(ENOMEM);
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}
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slice_byte_buffer = av_malloc(byte_buffer_size);
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if (!slice_byte_buffer) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
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return AVERROR(ENOMEM);
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}
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memset(slice_byte_buffer, 0, byte_buffer_size);
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slice_byte_buffer_size = byte_buffer_size;
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av_init_packet(&pkt);
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do {
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if (!end_of_stream) {
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if (av_read_frame(fmt_ctx, &pkt) < 0) {
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end_of_stream = 1;
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}
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}
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if (end_of_stream) {
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pkt.data = NULL;
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pkt.size = 0;
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}
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if (pkt.stream_index == video_stream || end_of_stream) {
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got_frame = 0;
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result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
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if (result < 0) {
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av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
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return result;
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}
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if (got_frame) {
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number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
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(const uint8_t* const *)fr->data, (const int*) fr->linesize,
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ctx->pix_fmt, ctx->width, ctx->height, 1);
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if (number_of_written_bytes < 0) {
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av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
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return number_of_written_bytes;
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}
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if (draw_horiz_band_called == 0) {
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av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
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return -1;
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}
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if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
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av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
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av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
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return -1;
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}
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}
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av_packet_unref(&pkt);
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av_init_packet(&pkt);
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}
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} while (!end_of_stream || got_frame);
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av_packet_unref(&pkt);
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av_frame_free(&fr);
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avcodec_close(ctx);
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avformat_close_input(&fmt_ctx);
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avcodec_free_context(&ctx);
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av_freep(&byte_buffer);
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av_freep(&slice_byte_buffer);
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return 0;
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}
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int main(int argc, char **argv)
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{
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if (argc < 2)
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{
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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]);
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return 1;
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}
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av_register_all();
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if (video_decode(argv[1]) != 0)
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return 1;
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return 0;
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}
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