* @brief Parent class for decoders of content.
*/
-#include <iostream>
-#include <stdint.h>
-extern "C" {
-#include <libavfilter/avfiltergraph.h>
-#include <libavfilter/buffersink.h>
-#include <libavfilter/avcodec.h>
-}
-#include "film.h"
-#include "format.h"
-#include "job.h"
-#include "film_state.h"
-#include "options.h"
-#include "exceptions.h"
-#include "image.h"
-#include "util.h"
-#include "log.h"
#include "decoder.h"
-#include "filter.h"
-#include "delay_line.h"
-
-using namespace std;
-using namespace boost;
+#include "decoded.h"
-/** @param s FilmState of the Film.
- * @param o Options.
- * @param j Job that we are running within, or 0
- * @param l Log to use.
- * @param minimal true to do the bare minimum of work; just run through the content. Useful for acquiring
- * accurate frame counts as quickly as possible. This generates no video or audio output.
- * @param ignore_length Ignore the content's claimed length when computing progress.
- */
-Decoder::Decoder (boost::shared_ptr<const FilmState> s, boost::shared_ptr<const Options> o, Job* j, Log* l, bool minimal, bool ignore_length)
- : _fs (s)
- , _opt (o)
- , _job (j)
- , _log (l)
- , _minimal (minimal)
- , _ignore_length (ignore_length)
- , _video_frame (0)
- , _buffer_src_context (0)
- , _buffer_sink_context (0)
- , _have_setup_video_filters (false)
- , _delay_line (0)
- , _delay_in_bytes (0)
-{
- if (_opt->decode_video_frequency != 0 && _fs->length == 0) {
- throw DecodeError ("cannot do a partial decode if length == 0");
- }
-}
+#include "i18n.h"
-Decoder::~Decoder ()
-{
- delete _delay_line;
-}
+using std::cout;
+using boost::shared_ptr;
-void
-Decoder::process_begin ()
+/** @param o Decode options.
+ */
+Decoder::Decoder ()
+ : _done (false)
{
- /* This assumes 2 bytes per sample */
- _delay_in_bytes = _fs->audio_delay * _fs->audio_sample_rate * _fs->audio_channels * 2 / 1000;
- delete _delay_line;
- _delay_line = new DelayLine (_delay_in_bytes);
-}
-void
-Decoder::process_end ()
-{
- if (_delay_in_bytes < 0) {
- uint8_t remainder[-_delay_in_bytes];
- _delay_line->get_remaining (remainder);
- Audio (remainder, _delay_in_bytes);
- }
}
-/** Start decoding */
-void
-Decoder::go ()
+struct DecodedSorter
{
- process_begin ();
-
- if (_job && _ignore_length) {
- _job->set_progress_unknown ();
- }
-
- while (pass () == false) {
- if (_job && !_ignore_length) {
- _job->set_progress (float (_video_frame) / decoding_frames ());
- }
+ bool operator() (shared_ptr<Decoded> a, shared_ptr<Decoded> b)
+ {
+ return a->dcp_time < b->dcp_time;
}
+};
- process_end ();
-}
-
-/** @return Number of frames that we will be decoding */
-int
-Decoder::decoding_frames () const
+shared_ptr<Decoded>
+Decoder::peek ()
{
- if (_opt->num_frames > 0) {
- return _opt->num_frames;
+ while (!_done && _pending.empty ()) {
+ _done = pass ();
}
-
- return _fs->length;
-}
-/** Run one pass. This may or may not generate any actual video / audio data;
- * some decoders may require several passes to generate a single frame.
- * @return true if we have finished processing all data; otherwise false.
- */
-bool
-Decoder::pass ()
-{
- if (!_have_setup_video_filters) {
- setup_video_filters ();
- _have_setup_video_filters = true;
- }
-
- if (_opt->num_frames != 0 && _video_frame >= _opt->num_frames) {
- return true;
+ if (_done && _pending.empty ()) {
+ return shared_ptr<Decoded> ();
}
- return do_pass ();
+ _pending.sort (DecodedSorter ());
+ return _pending.front ();
}
-/** Called by subclasses to tell the world that some audio data is ready */
void
-Decoder::process_audio (uint8_t* data, int channels, int size)
+Decoder::consume ()
{
- if (_fs->audio_gain != 0) {
- float const linear_gain = pow (10, _fs->audio_gain / 20);
- uint8_t* p = data;
- int const samples = size / 2;
- switch (_fs->audio_sample_format) {
- case AV_SAMPLE_FMT_S16:
- for (int i = 0; i < samples; ++i) {
- /* XXX: assumes little-endian; also we should probably be dithering here */
- int const ou = p[0] | (p[1] << 8);
- int const os = ou >= 0x8000 ? (- 0x10000 + ou) : ou;
- int const gs = int (os * linear_gain);
- int const gu = gs > 0 ? gs : (0x10000 + gs);
- p[0] = gu & 0xff;
- p[1] = (gu & 0xff00) >> 8;
- p += 2;
- }
- break;
- default:
- assert (false);
- }
+ if (!_pending.empty ()) {
+ _pending.pop_front ();
}
-
- int available = _delay_line->feed (data, size);
- Audio (data, available);
}
-/** 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)
+Decoder::seek (ContentTime, bool)
{
- 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 (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0) < 0) {
- throw DecodeError ("could not push buffer into filter chain.");
- }
-
- while (avfilter_poll_frame (_buffer_sink_context->inputs[0])) {
- AVFilterBufferRef* filter_buffer;
- if (av_buffersink_get_buffer_ref (_buffer_sink_context, &filter_buffer, 0) >= 0) {
-
- /* 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 ();
- }
-
- Video (image, _video_frame);
- ++_video_frame;
- }
- }
+ _pending.clear ();
+ _done = false;
}
-
-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->left_crop, _fs->top_crop), 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 create buffer src filter");
- }
-
- AVFilter* buffer_sink = avfilter_get_by_name("buffersink");
- if (buffer_sink == 0) {
- throw DecodeError ("Could not create buffer sink filter");
- }
-
- 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");
- }
-
- enum PixelFormat pixel_formats[] = { pixel_format(), PIX_FMT_NONE };
- if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, "out", 0, pixel_formats, 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 (avfilter_graph_parse (graph, filters.c_str(), &inputs, &outputs, 0) < 0) {
- throw DecodeError ("could not set up filter graph.");
- }
-
- if (avfilter_graph_config (graph, 0) < 0) {
- throw DecodeError ("could not configure filter graph.");
- }
-}
-
projects / dcpomatic.git / blobdiff