am7xxx-play: use av_find_best_stream() instead of open-coding the search

diff --git a/examples/am7xxx-play.c b/examples/am7xxx-play.c
index 88d398a..9deffd2 100644 (file)
--- a/examples/am7xxx-play.c
+++ b/examples/am7xxx-play.c
@@ -55,7 +55,6 @@ static int video_input_init(struct video_input_ctx *input_ctx,
        AVCodecContext *input_codec_ctx;
        AVCodec *input_codec;
        int video_index;
-       unsigned int i;
        int ret;
 
        avdevice_register_all();
@@ -100,29 +99,13 @@ static int video_input_init(struct video_input_ctx *input_ctx,
        av_dump_format(input_format_ctx, 0, input_path, 0);
 
        /* look for the first video_stream */
-       video_index = -1;
-       for (i = 0; i < input_format_ctx->nb_streams; i++)
-               if (input_format_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
-                       video_index = i;
-                       break;
-               }
-       if (video_index == -1) {
+       video_index = av_find_best_stream(input_format_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, &input_codec, 0);
+       if (video_index < 0) {
                fprintf(stderr, "cannot find any video streams\n");
                ret = -EINVAL;
                goto cleanup;
        }
 
-       /* get a pointer to the codec parameters for the video stream */
-       input_codec_params = input_format_ctx->streams[video_index]->codecpar;
-
-       /* find the decoder for the video stream */
-       input_codec = avcodec_find_decoder(input_codec_params->codec_id);
-       if (input_codec == NULL) {
-               fprintf(stderr, "input_codec is NULL!\n");
-               ret = -EINVAL;
-               goto cleanup;
-       }
-
        input_codec_ctx = avcodec_alloc_context3(input_codec);
        if (input_codec_ctx == NULL) {
                fprintf(stderr, "failed to allocate the input codec context\n");
@@ -130,6 +113,7 @@ static int video_input_init(struct video_input_ctx *input_ctx,
                goto cleanup;
        }
 
+       input_codec_params = input_format_ctx->streams[video_index]->codecpar;
        ret = avcodec_parameters_to_context(input_codec_ctx, input_codec_params);
        if (ret < 0) {
                fprintf(stderr, "cannot copy parameters to input codec context\n");