From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Thu, 5 Sep 2013 17:57:22 +0100
Subject: making act segmenter

---
 ffmpeg/libavformat/seek-test.c | 151 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 ffmpeg/libavformat/seek-test.c

(limited to 'ffmpeg/libavformat/seek-test.c')

diff --git a/ffmpeg/libavformat/seek-test.c b/ffmpeg/libavformat/seek-test.c
new file mode 100644
index 0000000..34ac4de
--- /dev/null
+++ b/ffmpeg/libavformat/seek-test.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2003 Fabrice Bellard
+ * Copyright (c) 2007 Michael Niedermayer
+ *
+ * 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 <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "libavutil/common.h"
+#include "libavutil/mathematics.h"
+#include "libavformat/avformat.h"
+
+static char buffer[20];
+
+static const char *ret_str(int v)
+{
+    switch (v) {
+    case AVERROR_EOF:     return "-EOF";
+    case AVERROR(EIO):    return "-EIO";
+    case AVERROR(ENOMEM): return "-ENOMEM";
+    case AVERROR(EINVAL): return "-EINVAL";
+    default:
+        snprintf(buffer, sizeof(buffer), "%2d", v);
+        return buffer;
+    }
+}
+
+static void ts_str(char buffer[60], int64_t ts, AVRational base)
+{
+    if (ts == AV_NOPTS_VALUE) {
+        strcpy(buffer, " NOPTS   ");
+        return;
+    }
+    ts= av_rescale_q(ts, base, (AVRational){1, 1000000});
+    snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);
+}
+
+int main(int argc, char **argv)
+{
+    const char *filename;
+    AVFormatContext *ic = NULL;
+    int i, ret, stream_id;
+    int j;
+    int64_t timestamp;
+    AVDictionary *format_opts = NULL;
+    int64_t seekfirst = AV_NOPTS_VALUE;
+    int firstback=0;
+    int frame_count = 1;
+
+    for(i=2; i<argc; i+=2){
+        if       (!strcmp(argv[i], "-seekforw")){
+            seekfirst = atoi(argv[i+1]);
+        } else if(!strcmp(argv[i], "-seekback")){
+            seekfirst = atoi(argv[i+1]);
+            firstback = 1;
+        } else if(!strcmp(argv[i], "-frames")){
+            frame_count = atoi(argv[i+1]);
+        } else {
+            argc = 1;
+        }
+    }
+
+    av_dict_set(&format_opts, "channels", "1", 0);
+    av_dict_set(&format_opts, "sample_rate", "22050", 0);
+
+    /* initialize libavcodec, and register all codecs and formats */
+    av_register_all();
+
+    if (argc < 2) {
+        printf("usage: %s input_file\n"
+               "\n", argv[0]);
+        return 1;
+    }
+
+    filename = argv[1];
+
+    ret = avformat_open_input(&ic, filename, NULL, &format_opts);
+    av_dict_free(&format_opts);
+    if (ret < 0) {
+        fprintf(stderr, "cannot open %s\n", filename);
+        return 1;
+    }
+
+    ret = avformat_find_stream_info(ic, NULL);
+    if (ret < 0) {
+        fprintf(stderr, "%s: could not find codec parameters\n", filename);
+        return 1;
+    }
+
+    if(seekfirst != AV_NOPTS_VALUE){
+        if(firstback)   avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
+        else            avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
+    }
+    for(i=0; ; i++){
+        AVPacket pkt = { 0 };
+        AVStream *av_uninit(st);
+        char ts_buf[60];
+
+        if(ret>=0){
+            for(j=0; j<frame_count; j++) {
+            ret= av_read_frame(ic, &pkt);
+            if(ret>=0){
+                char dts_buf[60];
+                st= ic->streams[pkt.stream_index];
+                ts_str(dts_buf, pkt.dts, st->time_base);
+                ts_str(ts_buf,  pkt.pts, st->time_base);
+                printf("ret:%-10s st:%2d flags:%d dts:%s pts:%s pos:%7" PRId64 " size:%6d", ret_str(ret), pkt.stream_index, pkt.flags, dts_buf, ts_buf, pkt.pos, pkt.size);
+                av_free_packet(&pkt);
+            } else
+                printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
+            printf("\n");
+            }
+        }
+
+        if(i>25) break;
+
+        stream_id= (i>>1)%(ic->nb_streams+1) - 1;
+        timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
+        if(stream_id>=0){
+            st= ic->streams[stream_id];
+            timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
+        }
+        //FIXME fully test the new seek API
+        if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
+        else    ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
+        ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
+        printf("ret:%-10s st:%2d flags:%d  ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
+    }
+
+    avformat_close_input(&ic);
+
+    return 0;
+}
-- 
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