mirror of
https://github.com/pineappleEA/pineapple-src.git
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166 lines
5.4 KiB
C
166 lines
5.4 KiB
C
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/*
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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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* H264 codec 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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#include "libavutil/timestamp.h"
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static int video_decode_example(const char *input_filename)
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{
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AVCodec *codec = NULL;
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AVCodecContext *ctx= NULL;
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AVCodecParameters *origin_par = NULL;
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AVFrame *fr = NULL;
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uint8_t *byte_buffer = 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 i = 0;
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int result;
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int end_of_stream = 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_par = fmt_ctx->streams[video_stream]->codecpar;
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codec = avcodec_find_decoder(origin_par->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_parameters_to_context(ctx, origin_par);
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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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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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byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16);
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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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printf("#tb %d: %d/%d\n", video_stream, fmt_ctx->streams[video_stream]->time_base.num, fmt_ctx->streams[video_stream]->time_base.den);
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i = 0;
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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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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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if (pkt.pts == AV_NOPTS_VALUE)
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pkt.pts = pkt.dts = i;
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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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printf("%d, %s, %s, %8"PRId64", %8d, 0x%08lx\n", video_stream,
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av_ts2str(fr->pts), av_ts2str(fr->pkt_dts), fr->pkt_duration,
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number_of_written_bytes, av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes));
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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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i++;
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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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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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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\n");
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return 1;
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}
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if (video_decode_example(argv[1]) != 0)
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return 1;
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return 0;
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}
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