api-seek-test: first version

Works only with video stream.
First pass without seeking -- counts crcs of a frames and store it in an array.
After that it seeks a lot in different places and checks if crcs of these frames and crcs of frames in array are the same.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

tests/api/Makefile

 APITESTPROGS-$(call ENCDEC, FLAC, FLAC) += api-flac
 APITESTPROGS-$(call DEMDEC, H264, H264) += api-h264
+APITESTPROGS-yes += api-seek
 APITESTPROGS += $(APITESTPROGS-yes)
 
 APITESTOBJS  := $(APITESTOBJS:%=$(APITESTSDIR)%) $(APITESTPROGS:%=$(APITESTSDIR)/%-test.o)

tests/api/api-seek-test.c

+/*
+ * Copyright (c) 2015 Ludmila Glinskih
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * Seek test.
+ */
+
+#include "libavutil/adler32.h"
+#include "libavcodec/avcodec.h"
+#include "libavformat/avformat.h"
+#include "libavutil/imgutils.h"
+
+int64_t *pts_array;
+int64_t *crc_array;
+int size_of_array;
+int number_of_elements;
+
+static int add_crc_to_array(int64_t crc, int64_t pts)
+{
+    if (size_of_array <= number_of_elements) {
+        if (size_of_array == 0)
+            size_of_array = 10;
+        size_of_array *= 2;
+        crc_array = av_realloc(crc_array, size_of_array * sizeof(int64_t));
+        pts_array = av_realloc(pts_array, size_of_array * sizeof(int64_t));
+        if ((crc_array == NULL) || (pts_array == NULL)) {
+            av_log(NULL, AV_LOG_ERROR, "Can't allocate array to store crcs\n");
+            return AVERROR(ENOMEM);
+        }
+    }
+    crc_array[number_of_elements] = crc;
+    pts_array[number_of_elements] = pts;
+    number_of_elements++;
+    return 0;
+}
+
+static int compare_crc_in_array(int64_t crc, int64_t pts)
+{
+    int i;
+    for (i = 0; i < number_of_elements; i++) {
+        if (pts_array[i] == pts) {
+            if (crc_array[i] == crc) {
+                printf("Comparing 0x%08lx %"PRId64" %d is OK\n", crc, pts, i);
+                return 0;
+            }
+            else {
+                av_log(NULL, AV_LOG_ERROR, "Incorrect crc of a frame after seeking\n");
+                return -1;
+            }
+        }
+    }
+    av_log(NULL, AV_LOG_ERROR, "Incorrect pts of a frame after seeking\n");
+    return -1;
+}
+
+static int compute_crc_of_packets(AVFormatContext *fmt_ctx, int video_stream,
+                                AVCodecContext *ctx, AVFrame *fr, uint64_t ts_start, uint64_t ts_end, int no_seeking)
+{
+    int number_of_written_bytes;
+    int got_frame = 0;
+    int result;
+    int end_of_stream = 0;
+    int byte_buffer_size;
+    uint8_t *byte_buffer;
+    int64_t crc;
+    AVPacket pkt;
+
+    byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16);
+    byte_buffer = av_malloc(byte_buffer_size);
+    if (!byte_buffer) {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
+        return AVERROR(ENOMEM);
+    }
+
+    if (!no_seeking) {
+        result = av_seek_frame(fmt_ctx, video_stream, ts_start, AVSEEK_FLAG_ANY);
+        printf("Seeking to %"PRId64", computing crc for frames with pts < %"PRId64"\n", ts_start, ts_end);
+        if (result < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error in seeking\n");
+            return result;
+        }
+        avcodec_flush_buffers(ctx);
+    }
+
+    av_init_packet(&pkt);
+    do {
+        if (!end_of_stream)
+            if (av_read_frame(fmt_ctx, &pkt) < 0)
+                end_of_stream = 1;
+        if (end_of_stream) {
+            pkt.data = NULL;
+            pkt.size = 0;
+        }
+        if (pkt.stream_index == video_stream || end_of_stream) {
+            got_frame = 0;
+            if ((pkt.pts == AV_NOPTS_VALUE) && (!end_of_stream)) {
+                av_log(NULL, AV_LOG_ERROR, "Error: frames doesn't have pts values\n");
+                return -1;
+            }
+            result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
+            if (result < 0) {
+                av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
+                return result;
+            }
+            if (got_frame) {
+                number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
+                                        (const uint8_t* const *)fr->data, (const int*) fr->linesize,
+                                        ctx->pix_fmt, ctx->width, ctx->height, 1);
+                if (number_of_written_bytes < 0) {
+                    av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
+                    return number_of_written_bytes;
+                }
+                if ((fr->pkt_pts > ts_end) && (!no_seeking))
+                    break;
+                crc = av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes);
+                printf("%10"PRId64", 0x%08lx\n", fr->pkt_pts, crc);
+                if (no_seeking) {
+                    if (add_crc_to_array(crc, fr->pkt_pts) < 0)
+                        return -1;
+                }
+                else {
+                    if (compare_crc_in_array(crc, fr->pkt_pts) < 0)
+                        return -1;
+                }
+            }
+        }
+        av_free_packet(&pkt);
+        av_init_packet(&pkt);
+    } while ((!end_of_stream || got_frame) && (no_seeking || (fr->pkt_pts + av_frame_get_pkt_duration(fr) <= ts_end)));
+
+    av_free_packet(&pkt);
+    av_freep(&byte_buffer);
+
+    return 0;
+}
+
+static long int read_seek_range(const char *string_with_number)
+{
+    long int number;
+    char *end_of_string = NULL;
+    number = strtol(string_with_number, &end_of_string, 10);
+    if ((strlen(string_with_number) != end_of_string - string_with_number)  || (number < 0)) {
+        av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n");
+        return -1;
+    }
+    else if ((number == LONG_MAX) || (number == LONG_MIN)) {
+        if (errno == ERANGE) {
+            av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n");
+            return -1;
+        }
+    }
+    return number;
+}
+
+static int seek_test(const char *input_filename, const char *start, const char *end)
+{
+    AVCodec *codec = NULL;
+    AVCodecContext *origin_ctx = NULL, *ctx= NULL;
+    AVFrame *fr = NULL;
+    AVFormatContext *fmt_ctx = NULL;
+    int video_stream;
+    int result;
+    int i, j;
+    long int start_ts, end_ts;
+
+    size_of_array = 0;
+    number_of_elements = 0;
+    crc_array = pts_array = NULL;
+
+    result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
+    if (result < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
+        return result;
+    }
+
+    result = avformat_find_stream_info(fmt_ctx, NULL);
+    if (result < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
+        return result;
+    }
+
+    start_ts = read_seek_range(start);
+    end_ts = read_seek_range(end);
+    if ((start_ts < 0) || (end_ts < 0))
+        return -1;
+
+    //TODO: add ability to work with audio format
+    video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
+    if (video_stream < 0) {
+      av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
+      return -1;
+    }
+
+    origin_ctx = fmt_ctx->streams[video_stream]->codec;
+
+    codec = avcodec_find_decoder(origin_ctx->codec_id);
+    if (!codec) {
+        av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
+        return -1;
+    }
+
+    ctx = avcodec_alloc_context3(codec);
+    if (!ctx) {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
+        return AVERROR(ENOMEM);
+    }
+
+    result = avcodec_copy_context(ctx, origin_ctx);
+    if (result) {
+        av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
+        return result;
+    }
+
+    result = avcodec_open2(ctx, codec, NULL);
+    if (result < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
+        return result;
+    }
+
+    fr = av_frame_alloc();
+    if (!fr) {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
+        return AVERROR(ENOMEM);
+    }
+
+    result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, i, j, 1);
+    if (result != 0)
+        return -1;
+
+    for (i = start_ts; i < end_ts; i += 100) {
+        for (j = i + 100; j < end_ts; j += 100)
+        result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, i, j, 0);
+        if (result != 0)
+            return -1;
+    }
+
+    av_freep(&crc_array);
+    av_freep(&pts_array);
+    av_frame_free(&fr);
+    avcodec_close(ctx);
+    avformat_close_input(&fmt_ctx);
+    avcodec_free_context(&ctx);
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 4) {
+        av_log(NULL, AV_LOG_ERROR, "Incorrect input\n");
+        return 1;
+    }
+
+    av_register_all();
+
+    if (seek_test(argv[1], argv[2], argv[3]) != 0)
+        return 1;
+
+    return 0;
+}

tests/fate/api.mak

@@ -8,6 +8,12 @@ FATE_API_SAMPLES_LIBAVFORMAT-$(call DEMDEC, H264, H264) += fate-api-h264
 fate-api-h264: $(APITESTSDIR)/api-h264-test$(EXESUF)
 fate-api-h264: CMD = run $(APITESTSDIR)/api-h264-test $(TARGET_SAMPLES)/h264-conformance/SVA_NL2_E.264
 
+FATE_API_LIBAVFORMAT-yes += fate-api-seek
+fate-api-seek: $(APITESTSDIR)/api-seek-test$(EXESUF) fate-lavf
+fate-api-seek: CMD = run $(APITESTSDIR)/api-seek-test $(TARGET_PATH)/tests/data/lavf/lavf.flv 0 720
+fate-api-seek: CMP = null
+fate-api-seek: REF = /dev/null
+
 FATE_API_SAMPLES-$(CONFIG_AVFORMAT) += $(FATE_API_SAMPLES_LIBAVFORMAT-yes)
 
 ifdef SAMPLES