*/
+/** @file src/lib/filter_graph.cc
+ * @brief A graph of FFmpeg filters.
+ */
+
extern "C" {
#include <libavfilter/avfiltergraph.h>
+#ifdef HAVE_BUFFERSRC_H
#include <libavfilter/buffersrc.h>
+#endif
#if (LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 53 && LIBAVFILTER_VERSION_MINOR <= 77) || LIBAVFILTER_VERSION_MAJOR == 3
#include <libavfilter/avcodec.h>
#include <libavfilter/buffersink.h>
#include "film.h"
#include "ffmpeg_decoder.h"
+#include "i18n.h"
+
using std::stringstream;
using std::string;
using std::list;
using boost::shared_ptr;
-
-FilterGraph::FilterGraph (shared_ptr<Film> film, FFmpegDecoder* decoder, bool crop, Size s, AVPixelFormat p)
+using libdcp::Size;
+
+/** Construct a FilterGraph for the settings in a film.
+ * @param film Film.
+ * @param decoder Decoder that we are using.
+ * @param s Size of the images to process.
+ * @param p Pixel format of the images to process.
+ */
+FilterGraph::FilterGraph (shared_ptr<const Film> film, FFmpegDecoder* decoder, libdcp::Size s, AVPixelFormat p)
: _buffer_src_context (0)
, _buffer_sink_context (0)
, _size (s)
{
string filters = Filter::ffmpeg_strings (film->filters()).first;
if (!filters.empty ()) {
- filters += ",";
+ filters += N_(",");
}
- if (crop) {
- filters += crop_string (Position (film->crop().left, film->crop().top), film->cropped_size (decoder->native_size()));
- } else {
- filters += crop_string (Position (0, 0), decoder->native_size());
- }
+ filters += crop_string (Position (film->crop().left, film->crop().top), film->cropped_size (decoder->native_size()));
- avfilter_register_all ();
-
AVFilterGraph* graph = avfilter_graph_alloc();
if (graph == 0) {
- throw DecodeError ("Could not create filter graph.");
+ throw DecodeError (N_("could not create filter graph."));
}
- AVFilter* buffer_src = avfilter_get_by_name("buffer");
+ AVFilter* buffer_src = avfilter_get_by_name(N_("buffer"));
if (buffer_src == 0) {
- throw DecodeError ("Could not find buffer src filter");
+ throw DecodeError (N_("could not find buffer src filter"));
}
AVFilter* buffer_sink = get_sink ();
stringstream a;
- a << _size.width << ":"
- << _size.height << ":"
- << _pixel_format << ":"
- << decoder->time_base_numerator() << ":"
- << decoder->time_base_denominator() << ":"
- << decoder->sample_aspect_ratio_numerator() << ":"
+ a << _size.width << N_(":")
+ << _size.height << N_(":")
+ << _pixel_format << N_(":")
+ << decoder->time_base_numerator() << N_(":")
+ << decoder->time_base_denominator() << N_(":")
+ << decoder->sample_aspect_ratio_numerator() << N_(":")
<< decoder->sample_aspect_ratio_denominator();
int r;
- if ((r = avfilter_graph_create_filter (&_buffer_src_context, buffer_src, "in", a.str().c_str(), 0, graph)) < 0) {
- throw DecodeError ("could not create buffer source");
+ if ((r = avfilter_graph_create_filter (&_buffer_src_context, buffer_src, N_("in"), a.str().c_str(), 0, graph)) < 0) {
+ throw DecodeError (N_("could not create buffer source"));
}
AVBufferSinkParams* sink_params = av_buffersink_params_alloc ();
pixel_fmts[1] = PIX_FMT_NONE;
sink_params->pixel_fmts = pixel_fmts;
- if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, "out", 0, sink_params, graph) < 0) {
- throw DecodeError ("could not create buffer sink.");
+ if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, N_("out"), 0, sink_params, graph) < 0) {
+ throw DecodeError (N_("could not create buffer sink."));
}
AVFilterInOut* outputs = avfilter_inout_alloc ();
- outputs->name = av_strdup("in");
+ outputs->name = av_strdup(N_("in"));
outputs->filter_ctx = _buffer_src_context;
outputs->pad_idx = 0;
outputs->next = 0;
AVFilterInOut* inputs = avfilter_inout_alloc ();
- inputs->name = av_strdup("out");
+ inputs->name = av_strdup(N_("out"));
inputs->filter_ctx = _buffer_sink_context;
inputs->pad_idx = 0;
inputs->next = 0;
#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
if (avfilter_graph_parse (graph, filters.c_str(), inputs, outputs, 0) < 0) {
- throw DecodeError ("could not set up filter graph.");
+ throw DecodeError (N_("could not set up filter graph."));
}
#else
if (avfilter_graph_parse (graph, filters.c_str(), &inputs, &outputs, 0) < 0) {
- throw DecodeError ("could not set up filter graph.");
+ throw DecodeError (N_("could not set up filter graph."));
}
#endif
if (avfilter_graph_config (graph, 0) < 0) {
- throw DecodeError ("could not configure filter graph.");
+ throw DecodeError (N_("could not configure filter graph."));
}
/* XXX: leaking `inputs' / `outputs' ? */
}
+/** Take an AVFrame and process it using our configured filters, returning a
+ * set of Images.
+ */
list<shared_ptr<Image> >
FilterGraph::process (AVFrame const * frame)
{
#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 53 && LIBAVFILTER_VERSION_MINOR <= 61
if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0) < 0) {
- throw DecodeError ("could not push buffer into filter chain.");
+ throw DecodeError (N_("could not push buffer into filter chain."));
}
#elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
par.den = sample_aspect_ratio_denominator ();
if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0, par) < 0) {
- throw DecodeError ("could not push buffer into filter chain.");
+ throw DecodeError (N_("could not push buffer into filter chain."));
}
#else
if (av_buffersrc_write_frame (_buffer_src_context, frame) < 0) {
- throw DecodeError ("could not push buffer into filter chain.");
+ throw DecodeError (N_("could not push buffer into filter chain."));
}
#endif
int r = avfilter_request_frame (_buffer_sink_context->inputs[0]);
if (r < 0) {
- throw DecodeError ("could not request filtered frame");
+ throw DecodeError (N_("could not request filtered frame"));
}
AVFilterBufferRef* filter_buffer = _buffer_sink_context->inputs[0]->cur_buf;
return images;
}
+/** @param s Image size.
+ * @param p Pixel format.
+ * @return true if this chain can process images with `s' and `p', otherwise false.
+ */
bool
-FilterGraph::can_process (Size s, AVPixelFormat p) const
+FilterGraph::can_process (libdcp::Size s, AVPixelFormat p) const
{
return (_size == s && _pixel_format == p);
}