Fix checking of frame channels vs stream channels.

[dcpomatic.git] / src / lib / ffmpeg_decoder.cc

diff --git a/src/lib/ffmpeg_decoder.cc b/src/lib/ffmpeg_decoder.cc
index ba96d71ff5da78a9fe084d1bd56bbb2d82be56d4..a5b36d04f442ee71f8ca76adbc718f7c08f4ab3e 100644 (file)
--- a/src/lib/ffmpeg_decoder.cc
+++ b/src/lib/ffmpeg_decoder.cc
@@ -219,8 +219,9 @@ FFmpegDecoder::pass ()
 /** @param data pointer to array of pointers to buffers.
  *  Only the first buffer will be used for non-planar data, otherwise there will be one per channel.
  */
+static
 shared_ptr<AudioBuffers>
-FFmpegDecoder::deinterleave_audio (AVFrame* frame)
+deinterleave_audio(shared_ptr<FFmpegAudioStream> stream, AVFrame* frame)
 {
        auto format = static_cast<AVSampleFormat>(frame->format);
 
@@ -326,12 +327,12 @@ FFmpegDecoder::deinterleave_audio (AVFrame* frame)
        case AV_SAMPLE_FMT_FLTP:
        {
                auto p = reinterpret_cast<float**> (frame->data);
-               DCPOMATIC_ASSERT (frame->channels <= channels);
+               DCPOMATIC_ASSERT(channels <= stream->channels());
                /* Sometimes there aren't as many channels in the frame as in the stream */
-               for (int i = 0; i < frame->channels; ++i) {
+               for (int i = 0; i < channels; ++i) {
                        memcpy (data[i], p[i], frames * sizeof(float));
                }
-               for (int i = frame->channels; i < channels; ++i) {
+               for (int i = channels; i < stream->channels(); ++i) {
                        audio->make_silent (i);
                }
        }
@@ -450,7 +451,7 @@ void
 FFmpegDecoder::process_audio_frame (shared_ptr<FFmpegAudioStream> stream)
 {
        auto frame = audio_frame (stream);
-       auto data = deinterleave_audio (frame);
+       auto data = deinterleave_audio(stream, frame);
 
        auto const time_base = stream->stream(_format_context)->time_base;