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lib/ffmpeg/Filter: add ParseSingleInOut()

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Merge some duplicate code.
This commit is contained in:
Max Kellermann
2021-08-24 13:26:28 +02:00
parent 71a5311b06
commit 7b4225aa1f
4 changed files with 18 additions and 23 deletions
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12
src/filter/plugins/FfmpegFilterPlugin.cxx
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@@ -47,17 +47,7 @@ PreparedFfmpegFilter::Open(AudioFormat &in_audio_format)
auto &buffer_sink = Ffmpeg::MakeAudioBufferSink(*graph);
Ffmpeg::FilterInOut io_sink("out", buffer_sink);
Ffmpeg::FilterInOut io_src("in", buffer_src);
auto io = graph.Parse(graph_string, std::move(io_sink),
std::move(io_src));
if (io.first.get() != nullptr)
throw std::runtime_error("FFmpeg filter has an open input");
if (io.second.get() != nullptr)
throw std::runtime_error("FFmpeg filter has an open output");
graph.ParseSingleInOut(graph_string, buffer_sink, buffer_src);
graph.CheckAndConfigure();
const auto out_audio_format =

13
src/filter/plugins/HdcdFilterPlugin.cxx
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@@ -48,18 +48,7 @@ OpenHdcdFilter(AudioFormat &in_audio_format)
auto &buffer_sink = Ffmpeg::MakeAudioBufferSink(*graph);
Ffmpeg::FilterInOut io_sink("out", buffer_sink);
Ffmpeg::FilterInOut io_src("in", buffer_src);
auto io = graph.Parse(hdcd_graph, std::move(io_sink),
std::move(io_src));
if (io.first.get() != nullptr)
throw std::runtime_error("FFmpeg filter has an open input");
if (io.second.get() != nullptr)
throw std::runtime_error("FFmpeg filter has an open output");
graph.ParseSingleInOut(hdcd_graph, buffer_sink, buffer_src);
graph.CheckAndConfigure();
auto out_audio_format = in_audio_format;

13
src/lib/ffmpeg/Filter.cxx
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@@ -100,4 +100,17 @@ MakeAudioBufferSink(AVFilterGraph &graph_ctx)
graph_ctx);
}
void
FilterGraph::ParseSingleInOut(const char *filters, AVFilterContext &in,
AVFilterContext &out)
{
auto [inputs, outputs] = Parse(filters, {"out", in}, {"in", out});
if (inputs.get() != nullptr)
throw std::runtime_error("FFmpeg filter has an open input");
if (outputs.get() != nullptr)
throw std::runtime_error("FFmpeg filter has an open output");
}
} // namespace Ffmpeg

3
src/lib/ffmpeg/Filter.hxx
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@@ -138,6 +138,9 @@ public:
return std::make_pair(std::move(inputs), std::move(outputs));
}
void ParseSingleInOut(const char *filters, AVFilterContext &in,
AVFilterContext &out);
std::pair<FilterInOut, FilterInOut> Parse(const char *filters) {
AVFilterInOut *inputs, *outputs;
int err = avfilter_graph_parse2(graph, filters,