pineapple-src/externals/ffmpeg/tools/venc_data_dump.c

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2021-02-09 03:25:58 +00:00
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include "libavutil/common.h"
#include "libavutil/dict.h"
#include "libavutil/error.h"
#include "libavutil/video_enc_params.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
static int decode_read(AVCodecContext *decoder, AVFrame *frame, int flush, int max_frames)
{
const int ret_done = flush ? AVERROR_EOF : AVERROR(EAGAIN);
int ret = 0;
while (ret >= 0 &&
(max_frames == 0 || decoder->frame_number < max_frames)) {
AVFrameSideData *sd;
ret = avcodec_receive_frame(decoder, frame);
if (ret < 0)
return (ret == ret_done) ? 0 : ret;
fprintf(stdout, "frame %d\n", decoder->frame_number - 1);
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS);
if (sd) {
AVVideoEncParams *par = (AVVideoEncParams*)sd->data;
fprintf(stdout, "AVVideoEncParams %d\n", par->type);
fprintf(stdout, "qp %d\n", par->qp);
for (int i = 0; i < FF_ARRAY_ELEMS(par->delta_qp); i++)
for (int j = 0; j < FF_ARRAY_ELEMS(par->delta_qp[i]); j++) {
if (par->delta_qp[i][j])
fprintf(stdout, "delta_qp[%d][%d] %"PRId32"\n", i, j, par->delta_qp[i][j]);
}
if (par->nb_blocks) {
fprintf(stdout, "nb_blocks %d\n", par->nb_blocks);
for (int i = 0; i < par->nb_blocks; i++) {
AVVideoBlockParams *b = av_video_enc_params_block(par, i);
fprintf(stdout, "block %d %d:%d %dx%d %"PRId32"\n",
i, b->src_x, b->src_y, b->w, b->h, b->delta_qp);
}
}
}
av_frame_unref(frame);
if (max_frames && decoder->frame_number == max_frames)
return 1;
}
return (max_frames == 0 || decoder->frame_number < max_frames) ? 0 : 1;
}
static int decoder_init(AVFormatContext *demuxer, int stream_idx,
AVCodecContext **dec, AVDictionary **opts)
{
const AVCodec *codec;
int ret;
if (stream_idx < 0 || stream_idx >= demuxer->nb_streams)
return AVERROR(EINVAL);
codec = avcodec_find_decoder(demuxer->streams[stream_idx]->codecpar->codec_id);
if (!codec)
return AVERROR_DECODER_NOT_FOUND;
*dec = avcodec_alloc_context3(codec);
if (!*dec)
return AVERROR(ENOMEM);
ret = avcodec_open2(*dec, NULL, opts);
if (ret < 0)
return ret;
return 0;
}
int main(int argc, char **argv)
{
AVFormatContext *demuxer = NULL;
AVCodecContext *decoder = NULL;
AVDictionary *opts = NULL;
AVPacket *pkt = NULL;
AVFrame *frame = NULL;
unsigned int stream_idx, max_frames;
const char *filename, *thread_type = NULL, *nb_threads = NULL;
int ret = 0;
if (argc <= 3) {
fprintf(stderr, "Usage: %s <input file> <stream index> <max frame count> [<thread count> <thread type>]\n", argv[0]);
return 0;
}
filename = argv[1];
stream_idx = strtol(argv[2], NULL, 0);
max_frames = strtol(argv[3], NULL, 0);
if (argc > 5) {
nb_threads = argv[4];
thread_type = argv[5];
}
ret = av_dict_set(&opts, "threads", nb_threads, 0);
ret |= av_dict_set(&opts, "thread_type", thread_type, 0);
ret |= av_dict_set(&opts, "export_side_data", "venc_params", 0);
ret = avformat_open_input(&demuxer, filename, NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Error opening input file: %d\n", ret);
return ret;
}
ret = decoder_init(demuxer, stream_idx, &decoder, &opts);
if (ret < 0) {
fprintf(stderr, "Error initializing decoder\n");
goto finish;
}
pkt = av_packet_alloc();
frame = av_frame_alloc();
if (!pkt || !frame) {
ret = AVERROR(ENOMEM);
goto finish;
}
while (ret >= 0) {
ret = av_read_frame(demuxer, pkt);
if (ret < 0)
goto flush;
if (pkt->stream_index != stream_idx) {
av_packet_unref(pkt);
continue;
}
ret = avcodec_send_packet(decoder, pkt);
if (ret < 0) {
fprintf(stderr, "Error decoding: %d\n", ret);
goto finish;
}
av_packet_unref(pkt);
ret = decode_read(decoder, frame, 0, max_frames);
if (ret < 0) {
fprintf(stderr, "Error decoding: %d\n", ret);
goto finish;
} else if (ret > 0) {
ret = 0;
goto finish;
}
}
flush:
avcodec_send_packet(decoder, NULL);
ret = decode_read(decoder, frame, 1, max_frames);
if (ret < 0) {
fprintf(stderr, "Error flushing: %d\n", ret);
goto finish;
}
ret = 0;
finish:
av_dict_free(&opts);
av_packet_free(&pkt);
av_frame_free(&frame);
avcodec_free_context(&decoder);
avformat_close_input(&demuxer);
return ret;
}