avcodec/pngenc: Check that there is at least 1 frame

[ffmpeg] / libavcodec / libopenh264enc.c

diff --git a/libavcodec/libopenh264enc.c b/libavcodec/libopenh264enc.c
index 33b7f6c7a87cce2ed0dd4e2aec6821e99f1b18c1..9603243fe325e7348f9d9b464bd72b311d1b82dd 100644 (file)
--- a/libavcodec/libopenh264enc.c
+++ b/libavcodec/libopenh264enc.c
@@ -59,29 +59,12 @@ static const AVClass class = {
     "libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
 };
 
-// Convert ffmpeg log level to equivalent libopenh264 log level.  Given the
-// conversions below, you must set the ffmpeg log level to something greater
-// than AV_LOG_DEBUG if you want to see WELS_LOG_DETAIL messages.
-static int ffmpeg_to_libopenh264_log_level  (
-    int ffmpeg_log_level
-    )
-{
-    if      (ffmpeg_log_level >  AV_LOG_DEBUG)   return WELS_LOG_DETAIL;
-    else if (ffmpeg_log_level >= AV_LOG_DEBUG)   return WELS_LOG_DEBUG;
-    else if (ffmpeg_log_level >= AV_LOG_INFO)    return WELS_LOG_INFO;
-    else if (ffmpeg_log_level >= AV_LOG_WARNING) return WELS_LOG_WARNING;
-    else if (ffmpeg_log_level >= AV_LOG_ERROR)   return WELS_LOG_ERROR;
-    else                                         return WELS_LOG_QUIET;
-}
-
 // Convert libopenh264 log level to equivalent ffmpeg log level.
-static int libopenh264_to_ffmpeg_log_level  (
-    int libopenh264_log_level
-    )
+static int libopenh264_to_libav_log_level(int libopenh264_log_level)
 {
     if      (libopenh264_log_level >= WELS_LOG_DETAIL)  return AV_LOG_TRACE;
     else if (libopenh264_log_level >= WELS_LOG_DEBUG)   return AV_LOG_DEBUG;
-    else if (libopenh264_log_level >= WELS_LOG_INFO)    return AV_LOG_INFO;
+    else if (libopenh264_log_level >= WELS_LOG_INFO)    return AV_LOG_VERBOSE;
     else if (libopenh264_log_level >= WELS_LOG_WARNING) return AV_LOG_WARNING;
     else if (libopenh264_log_level >= WELS_LOG_ERROR)   return AV_LOG_ERROR;
     else                                                return AV_LOG_QUIET;
@@ -93,20 +76,12 @@ static int libopenh264_to_ffmpeg_log_level  (
 //
 //        typedef void (*WelsTraceCallback) (void* ctx, int level, const char* string);
 
-static void libopenh264_trace_callback  (
-    void *          ctx,
-    int             level,
-    char const *    msg
-    )
+static void libopenh264_trace_callback(void *ctx, int level, char const *msg)
 {
     // The message will be logged only if the requested EQUIVALENT ffmpeg log level is
-    // less than or equal to the current ffmpeg log level.  Note, however, that before
-    // this function is called, welsCodecTrace::CodecTrace() will have already discarded
-    // the message (and this function will not be called) if the requested libopenh264
-    // log level "level" is greater than the current libopenh264 log level.
-    int equiv_ffmpeg_log_level = libopenh264_to_ffmpeg_log_level(level);
-    if (equiv_ffmpeg_log_level <= av_log_get_level())
-        av_log(ctx, equiv_ffmpeg_log_level, "%s\n", msg);
+    // less than or equal to the current ffmpeg log level.
+    int equiv_libav_log_level = libopenh264_to_libav_log_level(level);
+    av_log(ctx, equiv_libav_log_level, "%s\n", msg);
 }
 
 static av_cold int svc_encode_close(AVCodecContext *avctx)
@@ -123,7 +98,7 @@ static av_cold int svc_encode_init(AVCodecContext *avctx)
     SVCContext *s = avctx->priv_data;
     SEncParamExt param = { 0 };
     int err = AVERROR_UNKNOWN;
-    int equiv_libopenh264_log_level;
+    int log_level;
     WelsTraceCallback callback_function;
 
     // Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion
@@ -142,27 +117,16 @@ static av_cold int svc_encode_init(AVCodecContext *avctx)
         return AVERROR_UNKNOWN;
     }
 
-    // Set libopenh264 message logging level for this instance of the encoder using
-    // the current ffmpeg log level converted to the equivalent libopenh264 level.
-    //
-    // The client should have the ffmpeg level set to the desired value before creating
-    // the libopenh264 encoder.  Once the encoder has been created, the libopenh264
-    // log level is fixed for that encoder.  Changing the ffmpeg log level to a LOWER
-    // value, in the expectation that higher level libopenh264 messages will no longer
-    // be logged, WILL have the expected effect.  However, changing the ffmpeg log level
-    // to a HIGHER value, in the expectation that higher level libopenh264 messages will
-    // now be logged, WILL NOT have the expected effect.  This is because the higher
-    // level messages will be discarded by the libopenh264 logging system before our
-    // message logging callback function can be invoked.
-    equiv_libopenh264_log_level = ffmpeg_to_libopenh264_log_level(av_log_get_level());
-    (*s->encoder)->SetOption(s->encoder,ENCODER_OPTION_TRACE_LEVEL,&equiv_libopenh264_log_level);
+    // Pass all libopenh264 messages to our callback, to allow ourselves to filter them.
+    log_level = WELS_LOG_DETAIL;
+    (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_LEVEL, &log_level);
 
     // Set the logging callback function to one that uses av_log() (see implementation above).
     callback_function = (WelsTraceCallback) libopenh264_trace_callback;
-    (*s->encoder)->SetOption(s->encoder,ENCODER_OPTION_TRACE_CALLBACK,(void *)&callback_function);
+    (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, (void *)&callback_function);
 
     // Set the AVCodecContext as the libopenh264 callback context so that it can be passed to av_log().
-    (*s->encoder)->SetOption(s->encoder,ENCODER_OPTION_TRACE_CALLBACK_CONTEXT,(void *)&avctx);
+    (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK_CONTEXT, (void *)&avctx);
 
     (*s->encoder)->GetDefaultParams(s->encoder, &param);