-void
-Decoder::process_audio (uint8_t* data, int size)
-{
- /* Push into the delay line */
- size = _delay_line->feed (data, size);
-
- emit_audio (data, size);
-}
-
-void
-Decoder::emit_audio (uint8_t* data, int size)
-{
- /* Deinterleave and convert to float */
-
- float* samples[_fs->audio_channels()];
- int const total_samples = size / _fs->bytes_per_sample();
- int const frames = total_samples / _fs->audio_channels();
- for (int i = 0; i < _fs->audio_channels(); ++i) {
- samples[i] = new float[frames];
- }
-
- switch (_fs->audio_sample_format()) {
- case AV_SAMPLE_FMT_S16:
- {
- uint8_t* p = data;
- int sample = 0;
- int channel = 0;
- for (int i = 0; i < total_samples; ++i) {
- /* unsigned sample */
- int const ou = p[0] | (p[1] << 8);
- /* signed sample */
- int const os = ou >= 0x8000 ? (- 0x10000 + ou) : ou;
- /* float sample */
- samples[channel][sample] = float(os) / 0x8000;
-
- cout << samples[channel][sample] << " from s16\n";
-
- ++channel;
- if (channel == _fs->audio_channels()) {
- channel = 0;
- ++sample;
- }
-
- p += 2;
- }
- }
- break;
-
- case AV_SAMPLE_FMT_FLTP:
- {
- float* p = reinterpret_cast<float*> (data);
- for (int i = 0; i < _fs->audio_channels(); ++i) {
- for (int j = 0; j < frames; ++j) {
- samples[i][j] = *p++;
- cout << samples[i][j] << " from float.\n";
- ++p;
- }
- }
- }
- break;
-
- default:
- assert (false);
- }
-
- /* Maybe apply gain */
- if (_fs->audio_gain() != 0) {
- float const linear_gain = pow (10, _fs->audio_gain() / 20);
- for (int i = 0; i < _fs->audio_channels(); ++i) {
- for (int j = 0; j < frames; ++j) {
- samples[i][j] *= linear_gain;
- }
- }
- }
-
- /* Update the number of audio frames we've pushed to the encoder */
- _audio_frames_processed += frames;
-
- Audio (samples, frames);
-
- for (int i = 0; i < _fs->audio_channels(); ++i) {
- delete[] samples[i];
- }
-}
-
-/** Called by subclasses to tell the world that some video data is ready.
- * We do some post-processing / filtering then emit it for listeners.
- * @param frame to decode; caller manages memory.
- */
-void
-Decoder::process_video (AVFrame* frame)
-{
- if (_minimal) {
- ++_video_frame;
- return;
- }
-
- /* Use FilmState::length here as our one may be wrong */
-
- int gap = 0;
- if (_opt->decode_video_frequency != 0) {
- gap = _fs->length() / _opt->decode_video_frequency;
- }
-
- if (_opt->decode_video_frequency != 0 && gap != 0 && (_video_frame % gap) != 0) {
- ++_video_frame;
- return;
- }
-
-#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.");
- }
-
-#elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
-
- AVRational par;
- par.num = sample_aspect_ratio_numerator ();
- 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.");
- }
-
-#else
-
- if (av_buffersrc_write_frame (_buffer_src_context, frame) < 0) {
- throw DecodeError ("could not push buffer into filter chain.");
- }
-
-#endif
-
-#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15 && LIBAVFILTER_VERSION_MINOR <= 61
- while (avfilter_poll_frame (_buffer_sink_context->inputs[0])) {
-#else
- while (av_buffersink_read (_buffer_sink_context, 0)) {
-#endif
-
-#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15
-
- int r = avfilter_request_frame (_buffer_sink_context->inputs[0]);
- if (r < 0) {
- throw DecodeError ("could not request filtered frame");
- }
-
- AVFilterBufferRef* filter_buffer = _buffer_sink_context->inputs[0]->cur_buf;
-
-#else
-
- AVFilterBufferRef* filter_buffer;
- if (av_buffersink_get_buffer_ref (_buffer_sink_context, &filter_buffer, 0) < 0) {
- filter_buffer = 0;
- }
-
-#endif
-
- if (filter_buffer) {
- /* This takes ownership of filter_buffer */
- shared_ptr<Image> image (new FilterBufferImage ((PixelFormat) frame->format, filter_buffer));
-
- if (_opt->black_after > 0 && _video_frame > _opt->black_after) {
- image->make_black ();
- }
-
- shared_ptr<Subtitle> sub;
- if (_timed_subtitle && _timed_subtitle->displayed_at (double (last_video_frame()) / rint (_fs->frames_per_second()))) {
- sub = _timed_subtitle->subtitle ();
- }
-
- TIMING ("Decoder emits %1", _video_frame);
- Video (image, _video_frame, sub);
- ++_video_frame;
- }
- }
-}
-
-
-/** Set up a video filtering chain to include cropping and any filters that are specified
- * by the Film.
- */
-void
-Decoder::setup_video_filters ()
-{
- stringstream fs;
- Size size_after_crop;
-
- if (_opt->apply_crop) {
- size_after_crop = _fs->cropped_size (native_size ());
- fs << crop_string (Position (_fs->crop().left, _fs->crop().top), size_after_crop);
- } else {
- size_after_crop = native_size ();
- fs << crop_string (Position (0, 0), size_after_crop);
- }
-
- string filters = Filter::ffmpeg_strings (_fs->filters()).first;
- if (!filters.empty ()) {
- filters += ",";
- }
-
- filters += fs.str ();
-
- avfilter_register_all ();
-
- AVFilterGraph* graph = avfilter_graph_alloc();
- if (graph == 0) {
- throw DecodeError ("Could not create filter graph.");
- }
-
- AVFilter* buffer_src = avfilter_get_by_name("buffer");
- if (buffer_src == 0) {
- throw DecodeError ("Could not find buffer src filter");
- }
-
- AVFilter* buffer_sink = get_sink ();
-
- stringstream a;
- a << native_size().width << ":"
- << native_size().height << ":"
- << pixel_format() << ":"
- << time_base_numerator() << ":"
- << time_base_denominator() << ":"
- << sample_aspect_ratio_numerator() << ":"
- << 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");
- }
-
- AVBufferSinkParams* sink_params = av_buffersink_params_alloc ();
- PixelFormat* pixel_fmts = new PixelFormat[2];
- pixel_fmts[0] = pixel_format ();
- 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.");
- }
-
- AVFilterInOut* outputs = avfilter_inout_alloc ();
- outputs->name = av_strdup("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->filter_ctx = _buffer_sink_context;
- inputs->pad_idx = 0;
- inputs->next = 0;
-
- _log->log ("Using filter chain `" + filters + "'");
-
-#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.");
- }
-#else
- if (avfilter_graph_parse (graph, filters.c_str(), &inputs, &outputs, 0) < 0) {
- throw DecodeError ("could not set up filter graph.");
- }
-#endif
-
- if (avfilter_graph_config (graph, 0) < 0) {
- throw DecodeError ("could not configure filter graph.");
- }
-
- /* XXX: leaking `inputs' / `outputs' ? */
-}
-
-void
-Decoder::process_subtitle (shared_ptr<TimedSubtitle> s)