#include <stdexcept>
#include <vector>
-#include <sstream>
#include <iomanip>
#include <iostream>
#include <stdint.h>
#include "filter_graph.h"
#include "audio_buffers.h"
#include "ffmpeg_content.h"
-#include "image_proxy.h"
+#include "raw_image_proxy.h"
#include "film.h"
+#include "timer.h"
#include "i18n.h"
using std::cout;
using std::string;
using std::vector;
-using std::stringstream;
using std::list;
using std::min;
using std::pair;
+using std::make_pair;
using boost::shared_ptr;
using boost::optional;
using boost::dynamic_pointer_cast;
, SubtitleDecoder (c)
, FFmpeg (c)
, _log (log)
- , _subtitle_codec_context (0)
- , _subtitle_codec (0)
{
/* Audio and video frame PTS values may not start with 0. We want
to fiddle them so that:
}
}
-FFmpegDecoder::~FFmpegDecoder ()
-{
- boost::mutex::scoped_lock lm (_mutex);
-
- if (_subtitle_codec_context) {
- avcodec_close (_subtitle_codec_context);
- }
-}
-
void
FFmpegDecoder::flush ()
{
}
int const si = _packet.stream_index;
-
+
if (si == _video_stream) {
decode_video_packet ();
} else if (_ffmpeg_content->audio_stream() && _ffmpeg_content->audio_stream()->uses_index (_format_context, si)) {
return av_get_bytes_per_sample (audio_sample_format ());
}
-int
-FFmpegDecoder::minimal_run (boost::function<bool (optional<ContentTime>, optional<ContentTime>, int)> finished)
-{
- int frames_read = 0;
- optional<ContentTime> last_video;
- optional<ContentTime> last_audio;
-
- while (!finished (last_video, last_audio, frames_read)) {
- int r = av_read_frame (_format_context, &_packet);
- if (r < 0) {
- /* We should flush our decoders here, possibly yielding a few more frames,
- but the consequence of having to do that is too hideous to contemplate.
- Instead we give up and say that you can't seek too close to the end
- of a file.
- */
- return frames_read;
- }
-
- ++frames_read;
-
- double const time_base = av_q2d (_format_context->streams[_packet.stream_index]->time_base);
-
- if (_packet.stream_index == _video_stream) {
-
- av_frame_unref (_frame);
-
- int got_picture = 0;
- r = avcodec_decode_video2 (video_codec_context(), _frame, &got_picture, &_packet);
- if (r >= 0 && got_picture) {
- last_video = ContentTime::from_seconds (av_frame_get_best_effort_timestamp (_frame) * time_base) + _pts_offset;
- }
-
- } else if (_ffmpeg_content->audio_stream() && _ffmpeg_content->audio_stream()->uses_index (_format_context, _packet.stream_index)) {
- AVPacket copy_packet = _packet;
- while (copy_packet.size > 0) {
-
- int got_frame;
- r = avcodec_decode_audio4 (audio_codec_context(), _frame, &got_frame, &_packet);
- if (r >= 0 && got_frame) {
- last_audio = ContentTime::from_seconds (av_frame_get_best_effort_timestamp (_frame) * time_base) + _pts_offset;
- }
-
- copy_packet.data += r;
- copy_packet.size -= r;
- }
- }
-
- av_free_packet (&_packet);
- }
-
- return frames_read;
-}
-
-bool
-FFmpegDecoder::seek_overrun_finished (ContentTime seek, optional<ContentTime> last_video, optional<ContentTime> last_audio) const
+void
+FFmpegDecoder::seek (ContentTime time, bool accurate)
{
- return (last_video && last_video.get() >= seek) || (last_audio && last_audio.get() >= seek);
-}
+ VideoDecoder::seek (time, accurate);
+ AudioDecoder::seek (time, accurate);
+
+ /* If we are doing an `accurate' seek, we need to use pre-roll, as
+ we don't really know what the seek will give us.
+ */
-bool
-FFmpegDecoder::seek_final_finished (int n, int done) const
-{
- return n == done;
-}
+ ContentTime pre_roll = accurate ? ContentTime::from_seconds (2) : ContentTime (0);
+ time -= pre_roll;
-void
-FFmpegDecoder::seek_and_flush (ContentTime t)
-{
- ContentTime const u = t - _pts_offset;
+ /* XXX: it seems debatable whether PTS should be used here...
+ http://www.mjbshaw.com/2012/04/seeking-in-ffmpeg-know-your-timestamp.html
+ */
+
+ ContentTime const u = time - _pts_offset;
int64_t s = u.seconds() / av_q2d (_format_context->streams[_video_stream]->time_base);
if (_ffmpeg_content->audio_stream ()) {
);
}
- /* Ridiculous empirical hack */
- s--;
- if (s < 0) {
- s = 0;
- }
-
av_seek_frame (_format_context, _video_stream, s, 0);
avcodec_flush_buffers (video_codec_context());
if (audio_codec_context ()) {
avcodec_flush_buffers (audio_codec_context ());
}
- if (_subtitle_codec_context) {
- avcodec_flush_buffers (_subtitle_codec_context);
- }
-}
-
-void
-FFmpegDecoder::seek (ContentTime time, bool accurate)
-{
- VideoDecoder::seek (time, accurate);
- AudioDecoder::seek (time, accurate);
-
- /* If we are doing an accurate seek, our initial shot will be 2s (2 being
- a number plucked from the air) earlier than we want to end up. The loop below
- will hopefully then step through to where we want to be.
- */
-
- ContentTime pre_roll = accurate ? ContentTime::from_seconds (2) : ContentTime (0);
- ContentTime initial_seek = time - pre_roll;
- if (initial_seek < ContentTime (0)) {
- initial_seek = ContentTime (0);
- }
-
- /* Initial seek time in the video stream's timebase */
-
- seek_and_flush (initial_seek);
-
- if (!accurate) {
- /* That'll do */
- return;
- }
-
- int const N = minimal_run (boost::bind (&FFmpegDecoder::seek_overrun_finished, this, time, _1, _2));
-
- seek_and_flush (initial_seek);
- if (N > 0) {
- minimal_run (boost::bind (&FFmpegDecoder::seek_final_finished, this, N - 1, _3));
+ if (subtitle_codec_context ()) {
+ avcodec_flush_buffers (subtitle_codec_context ());
}
}
{
int got_subtitle;
AVSubtitle sub;
- if (avcodec_decode_subtitle2 (_subtitle_codec_context, &sub, &got_subtitle, &_packet) < 0 || !got_subtitle) {
+ if (avcodec_decode_subtitle2 (subtitle_codec_context(), &sub, &got_subtitle, &_packet) < 0 || !got_subtitle) {
return;
}
avsubtitle_free (&sub);
}
-bool
-FFmpegDecoder::has_subtitle_during (ContentTimePeriod p) const
+list<ContentTimePeriod>
+FFmpegDecoder::subtitles_during (ContentTimePeriod p, bool starting) const
{
- return _ffmpeg_content->has_subtitle_during (p);
+ return _ffmpeg_content->subtitles_during (p, starting);
}
projects / dcpomatic.git / blobdiff