tools/venc_data_dump.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdint.h>
  21 #include <stdlib.h>
  22
  23 #include "libavutil/common.h"
  24 #include "libavutil/dict.h"
  25 #include "libavutil/error.h"
  26 #include "libavutil/video_enc_params.h"
  27
  28 #include "libavformat/avformat.h"
  29
  30 #include "libavcodec/avcodec.h"
  31
  32 static int decode_read(AVCodecContext *decoder, AVFrame *frame, int flush, int max_frames)
  33 {
  34     const int ret_done = flush ? AVERROR_EOF : AVERROR(EAGAIN);
  35     int ret = 0;
  36
  37     while (ret >= 0 &&
  38            (max_frames == 0 ||  decoder->frame_number < max_frames)) {
  39         AVFrameSideData *sd;
  40
  41         ret = avcodec_receive_frame(decoder, frame);
  42         if (ret < 0)
  43             return (ret == ret_done) ? 0 : ret;
  44
  45         fprintf(stdout, "frame %d\n", decoder->frame_number - 1);
  46
  47         sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS);
  48         if (sd) {
  49             AVVideoEncParams *par = (AVVideoEncParams*)sd->data;
  50
  51             fprintf(stdout, "AVVideoEncParams %d\n", par->type);
  52             fprintf(stdout, "qp %d\n", par->qp);
  53             for (int i = 0; i < FF_ARRAY_ELEMS(par->delta_qp); i++)
  54                 for (int j = 0; j < FF_ARRAY_ELEMS(par->delta_qp[i]); j++) {
  55                     if (par->delta_qp[i][j])
  56                         fprintf(stdout, "delta_qp[%d][%d] %"PRId32"\n", i, j, par->delta_qp[i][j]);
  57                 }
  58
  59             if (par->nb_blocks) {
  60                 fprintf(stdout, "nb_blocks %d\n", par->nb_blocks);
  61                 for (int i = 0; i < par->nb_blocks; i++) {
  62                     AVVideoBlockParams *b = av_video_enc_params_block(par, i);
  63
  64                     fprintf(stdout, "block %d %d:%d %dx%d %"PRId32"\n",
  65                             i, b->src_x, b->src_y, b->w, b->h, b->delta_qp);
  66                 }
  67             }
  68         }
  69
  70         av_frame_unref(frame);
  71
  72         if (max_frames && decoder->frame_number == max_frames)
  73             return 1;
  74     }
  75
  76     return (max_frames == 0 || decoder->frame_number < max_frames) ? 0 : 1;
  77 }
  78
  79 static int decoder_init(AVFormatContext *demuxer, int stream_idx,
  80                         AVCodecContext **dec, AVDictionary **opts)
  81 {
  82     const AVCodec *codec;
  83     int ret;
  84
  85     if (stream_idx < 0 || stream_idx >= demuxer->nb_streams)
  86         return AVERROR(EINVAL);
  87
  88     codec = avcodec_find_decoder(demuxer->streams[stream_idx]->codecpar->codec_id);
  89     if (!codec)
  90         return AVERROR_DECODER_NOT_FOUND;
  91
  92     *dec = avcodec_alloc_context3(codec);
  93     if (!*dec)
  94         return AVERROR(ENOMEM);
  95
  96     ret = avcodec_open2(*dec, NULL, opts);
  97     if (ret < 0)
  98         return ret;
  99
 100     return 0;
 101 }
 102
 103 int main(int argc, char **argv)
 104 {
 105     AVFormatContext *demuxer = NULL;
 106     AVCodecContext  *decoder = NULL;
 107     AVDictionary       *opts = NULL;
 108
 109     AVPacket *pkt   = NULL;
 110     AVFrame  *frame = NULL;
 111
 112     unsigned int stream_idx, max_frames;
 113     const char *filename, *thread_type = NULL, *nb_threads = NULL;
 114     int ret = 0;
 115
 116     if (argc <= 3) {
 117         fprintf(stderr, "Usage: %s <input file> <stream index> <max frame count> [<thread count> <thread type>]\n", argv[0]);
 118         return 0;
 119     }
 120
 121     filename    = argv[1];
 122     stream_idx  = strtol(argv[2], NULL, 0);
 123     max_frames  = strtol(argv[3], NULL, 0);
 124     if (argc > 5) {
 125         nb_threads  = argv[4];
 126         thread_type = argv[5];
 127     }
 128
 129     ret  = av_dict_set(&opts, "threads",          nb_threads,    0);
 130     ret |= av_dict_set(&opts, "thread_type",      thread_type,   0);
 131     ret |= av_dict_set(&opts, "export_side_data", "venc_params", 0);
 132
 133     ret = avformat_open_input(&demuxer, filename, NULL, NULL);
 134     if (ret < 0) {
 135         fprintf(stderr, "Error opening input file: %d\n", ret);
 136         return ret;
 137     }
 138
 139     ret = decoder_init(demuxer, stream_idx, &decoder, &opts);
 140     if (ret < 0) {
 141         fprintf(stderr, "Error initializing decoder\n");
 142         goto finish;
 143     }
 144
 145     pkt   = av_packet_alloc();
 146     frame = av_frame_alloc();
 147     if (!pkt || !frame) {
 148         ret = AVERROR(ENOMEM);
 149         goto finish;
 150     }
 151
 152     while (ret >= 0) {
 153         ret = av_read_frame(demuxer, pkt);
 154         if (ret < 0)
 155             goto flush;
 156         if (pkt->stream_index != stream_idx) {
 157             av_packet_unref(pkt);
 158             continue;
 159         }
 160
 161         ret = avcodec_send_packet(decoder, pkt);
 162         if (ret < 0) {
 163             fprintf(stderr, "Error decoding: %d\n", ret);
 164             goto finish;
 165         }
 166         av_packet_unref(pkt);
 167
 168         ret = decode_read(decoder, frame, 0, max_frames);
 169         if (ret < 0) {
 170             fprintf(stderr, "Error decoding: %d\n", ret);
 171             goto finish;
 172         } else if (ret > 0) {
 173             ret = 0;
 174             goto finish;
 175         }
 176     }
 177
 178 flush:
 179     avcodec_send_packet(decoder, NULL);
 180     ret = decode_read(decoder, frame, 1, max_frames);
 181     if (ret < 0) {
 182         fprintf(stderr, "Error flushing: %d\n", ret);
 183         goto finish;
 184     }
 185     ret = 0;
 186
 187 finish:
 188     av_dict_free(&opts);
 189     av_packet_free(&pkt);
 190     av_frame_free(&frame);
 191     avcodec_free_context(&decoder);
 192     avformat_close_input(&demuxer);
 193
 194     return ret;
 195 }