#include "filter_graph.h"
#include "subtitle.h"
+#include "i18n.h"
+
using std::cout;
using std::string;
using std::vector;
setup_video ();
setup_audio ();
setup_subtitle ();
-
- if (!o.video_sync) {
- _first_video = 0;
- }
}
FFmpegDecoder::~FFmpegDecoder ()
}
if (avformat_find_stream_info (_format_context, 0) < 0) {
- throw DecodeError ("could not find stream information");
+ throw DecodeError (_("could not find stream information"));
}
/* Find video, audio and subtitle streams and choose the first of each */
}
if (_video_stream < 0) {
- throw DecodeError ("could not find video stream");
+ throw DecodeError (N_("could not find video stream"));
}
_frame = avcodec_alloc_frame ();
if (_frame == 0) {
- throw DecodeError ("could not allocate frame");
+ throw DecodeError (N_("could not allocate frame"));
}
}
_video_codec = avcodec_find_decoder (_video_codec_context->codec_id);
if (_video_codec == 0) {
- throw DecodeError ("could not find video decoder");
+ throw DecodeError (_("could not find video decoder"));
}
if (avcodec_open2 (_video_codec_context, _video_codec, 0) < 0) {
- throw DecodeError ("could not open video decoder");
+ throw DecodeError (N_("could not open video decoder"));
}
}
_audio_codec = avcodec_find_decoder (_audio_codec_context->codec_id);
if (_audio_codec == 0) {
- throw DecodeError ("could not find audio decoder");
+ throw DecodeError (_("could not find audio decoder"));
}
if (avcodec_open2 (_audio_codec_context, _audio_codec, 0) < 0) {
- throw DecodeError ("could not open audio decoder");
+ throw DecodeError (N_("could not open audio decoder"));
}
}
void
FFmpegDecoder::setup_subtitle ()
{
- if (!_subtitle_stream) {
+ if (!_subtitle_stream || _subtitle_stream->id() >= int (_format_context->nb_streams)) {
return;
}
_subtitle_codec = avcodec_find_decoder (_subtitle_codec_context->codec_id);
if (_subtitle_codec == 0) {
- throw DecodeError ("could not find subtitle decoder");
+ throw DecodeError (_("could not find subtitle decoder"));
}
if (avcodec_open2 (_subtitle_codec_context, _subtitle_codec, 0) < 0) {
- throw DecodeError ("could not open subtitle decoder");
+ throw DecodeError (N_("could not open subtitle decoder"));
}
}
/* Maybe we should fail here, but for now we'll just finish off instead */
char buf[256];
av_strerror (r, buf, sizeof(buf));
- _film->log()->log (String::compose ("error on av_read_frame (%1) (%2)", buf, r));
+ _film->log()->log (String::compose (N_("error on av_read_frame (%1) (%2)"), buf, r));
}
-
+
/* Get any remaining frames */
_packet.data = 0;
_packet.size = 0;
-
+
/* XXX: should we reset _packet.data and size after each *_decode_* call? */
-
+
int frame_finished;
-
+
if (_opt.decode_video) {
while (avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- filter_and_emit_video (_frame);
+ filter_and_emit_video ();
}
}
-
+
if (_audio_stream && _opt.decode_audio) {
- while (avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- int const data_size = av_samples_get_buffer_size (
- 0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
- );
-
- assert (_audio_codec_context->channels == _film->audio_channels());
- Audio (deinterleave_audio (_frame->data, data_size));
- }
+ decode_audio_packet ();
}
-
+
return true;
}
if (r >= 0 && frame_finished) {
if (r != _packet.size) {
- _film->log()->log (String::compose ("Used only %1 bytes of %2 in packet", r, _packet.size));
+ _film->log()->log (String::compose (N_("Used only %1 bytes of %2 in packet"), r, _packet.size));
}
- if (_opt.video_sync) {
- out_with_sync ();
- } else {
- filter_and_emit_video (_frame);
- }
+ filter_and_emit_video ();
}
} else if (ffa && _packet.stream_index == ffa->id() && _opt.decode_audio) {
-
- int frame_finished;
- if (avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
-
- /* Where we are in the source, in seconds */
- double const source_pts_seconds = av_q2d (_format_context->streams[_packet.stream_index]->time_base)
- * av_frame_get_best_effort_timestamp(_frame);
-
- /* We only decode audio if we've had our first video packet through, and if it
- was before this packet. Until then audio is thrown away.
- */
-
- if ((_first_video && _first_video.get() <= source_pts_seconds) || !_opt.decode_video) {
-
- if (!_first_audio && _opt.decode_video) {
- _first_audio = source_pts_seconds;
-
- /* This is our first audio frame, and if we've arrived here we must have had our
- first video frame. Push some silence to make up any gap between our first
- video frame and our first audio.
- */
-
- /* frames of silence that we must push */
- int const s = rint ((_first_audio.get() - _first_video.get()) * ffa->sample_rate ());
-
- _film->log()->log (
- String::compose (
- "First video at %1, first audio at %2, pushing %3 audio frames of silence for %4 channels (%5 bytes per sample)",
- _first_video.get(), _first_audio.get(), s, ffa->channels(), bytes_per_audio_sample()
- )
- );
-
- if (s) {
- shared_ptr<AudioBuffers> audio (new AudioBuffers (ffa->channels(), s));
- audio->make_silent ();
- Audio (audio);
- }
- }
-
- int const data_size = av_samples_get_buffer_size (
- 0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
- );
-
- assert (_audio_codec_context->channels == _film->audio_channels());
- Audio (deinterleave_audio (_frame->data, data_size));
- }
- }
-
- } else if (_subtitle_stream && _packet.stream_index == _subtitle_stream->id() && _opt.decode_subtitles && _first_video) {
+ decode_audio_packet ();
+ } else if (_subtitle_stream && _packet.stream_index == _subtitle_stream->id() && _opt.decode_subtitles) {
int got_subtitle;
AVSubtitle sub;
break;
default:
- throw DecodeError (String::compose ("Unrecognised audio sample format (%1)", static_cast<int> (audio_sample_format())));
+ throw DecodeError (String::compose (_("Unrecognised audio sample format (%1)"), static_cast<int> (audio_sample_format())));
}
return audio;
FFmpegDecoder::stream_name (AVStream* s) const
{
stringstream n;
-
- AVDictionaryEntry const * lang = av_dict_get (s->metadata, "language", 0, 0);
- if (lang) {
- n << lang->value;
- }
-
- AVDictionaryEntry const * title = av_dict_get (s->metadata, "title", 0, 0);
- if (title) {
- if (!n.str().empty()) {
- n << " ";
+
+ if (s->metadata) {
+ AVDictionaryEntry const * lang = av_dict_get (s->metadata, N_("language"), 0, 0);
+ if (lang) {
+ n << lang->value;
+ }
+
+ AVDictionaryEntry const * title = av_dict_get (s->metadata, N_("title"), 0, 0);
+ if (title) {
+ if (!n.str().empty()) {
+ n << N_(" ");
+ }
+ n << title->value;
}
- n << title->value;
}
if (n.str().empty()) {
- n << "unknown";
+ n << N_("unknown");
}
return n.str ();
}
void
-FFmpegDecoder::filter_and_emit_video (AVFrame* frame)
+FFmpegDecoder::filter_and_emit_video ()
{
boost::mutex::scoped_lock lm (_filter_graphs_mutex);
shared_ptr<FilterGraph> graph;
list<shared_ptr<FilterGraph> >::iterator i = _filter_graphs.begin();
- while (i != _filter_graphs.end() && !(*i)->can_process (libdcp::Size (frame->width, frame->height), (AVPixelFormat) frame->format)) {
+ while (i != _filter_graphs.end() && !(*i)->can_process (libdcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format)) {
++i;
}
if (i == _filter_graphs.end ()) {
- graph.reset (new FilterGraph (_film, this, libdcp::Size (frame->width, frame->height), (AVPixelFormat) frame->format));
+ graph.reset (new FilterGraph (_film, this, libdcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format));
_filter_graphs.push_back (graph);
- _film->log()->log (String::compose ("New graph for %1x%2, pixel format %3", frame->width, frame->height, frame->format));
+ _film->log()->log (String::compose (N_("New graph for %1x%2, pixel format %3"), _frame->width, _frame->height, _frame->format));
} else {
graph = *i;
}
- list<shared_ptr<Image> > images = graph->process (frame);
+ list<shared_ptr<Image> > images = graph->process (_frame);
for (list<shared_ptr<Image> >::iterator i = images.begin(); i != images.end(); ++i) {
- emit_video (*i, frame_time ());
+ int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ if (bet != AV_NOPTS_VALUE) {
+ emit_video (*i, false, bet * av_q2d (_format_context->streams[_video_stream]->time_base));
+ } else {
+ _film->log()->log ("Dropping frame without PTS");
+ }
}
}
bool
FFmpegDecoder::seek (double p)
{
- return do_seek (p, false);
+ return do_seek (p, false, false);
}
bool
(used when we change decoder parameters and want to re-fetch the frame) we end up going forwards rather than
staying in the same place.
*/
- return do_seek (last_source_time(), true);
+ return do_seek (last_source_time(), true, false);
+}
+
+void
+FFmpegDecoder::seek_back ()
+{
+ do_seek (last_source_time() - 2.5 / frames_per_second (), true, true);
+}
+
+void
+FFmpegDecoder::seek_forward ()
+{
+ do_seek (last_source_time() - 0.5 / frames_per_second(), true, true);
}
bool
-FFmpegDecoder::do_seek (double p, bool backwards)
+FFmpegDecoder::do_seek (double p, bool backwards, bool accurate)
{
int64_t const vt = p / av_q2d (_format_context->streams[_video_stream]->time_base);
int const r = av_seek_frame (_format_context, _video_stream, vt, backwards ? AVSEEK_FLAG_BACKWARD : 0);
-
+
avcodec_flush_buffers (_video_codec_context);
if (_subtitle_codec_context) {
avcodec_flush_buffers (_subtitle_codec_context);
}
-
+
+ if (accurate) {
+ while (1) {
+ int r = av_read_frame (_format_context, &_packet);
+ if (r < 0) {
+ return true;
+ }
+
+ avcodec_get_frame_defaults (_frame);
+
+ if (_packet.stream_index == _video_stream) {
+ int finished = 0;
+ int const r = avcodec_decode_video2 (_video_codec_context, _frame, &finished, &_packet);
+ if (r >= 0 && finished) {
+ int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ if (bet > vt) {
+ break;
+ }
+ }
+ }
+
+ av_free_packet (&_packet);
+ }
+ }
+
return r < 0;
}
stringstream s (t);
string type;
s >> type;
- if (type != "ffmpeg") {
+ if (type != N_("ffmpeg")) {
return shared_ptr<FFmpegAudioStream> ();
}
string type;
/* Current (marked version 1) */
n >> type >> _id >> _sample_rate >> _channel_layout;
- assert (type == "ffmpeg");
+ assert (type == N_("ffmpeg"));
}
for (int i = 0; i < name_index; ++i) {
string
FFmpegAudioStream::to_string () const
{
- return String::compose ("ffmpeg %1 %2 %3 %4", _id, _sample_rate, _channel_layout, _name);
-}
-
-void
-FFmpegDecoder::out_with_sync ()
-{
- /* Where we are in the output, in seconds */
- double const out_pts_seconds = video_frame() / frames_per_second();
-
- /* Where we are in the source, in seconds */
- double const source_pts_seconds = av_q2d (_format_context->streams[_packet.stream_index]->time_base)
- * av_frame_get_best_effort_timestamp(_frame);
-
- _film->log()->log (
- String::compose ("Source video frame ready; source at %1, output at %2", source_pts_seconds, out_pts_seconds),
- Log::VERBOSE
- );
-
- if (!_first_video) {
- _first_video = source_pts_seconds;
- }
-
- /* Difference between where we are and where we should be */
- double const delta = source_pts_seconds - _first_video.get() - out_pts_seconds;
- double const one_frame = 1 / frames_per_second();
-
- /* Insert frames if required to get out_pts_seconds up to pts_seconds */
- if (delta > one_frame) {
- int const extra = rint (delta / one_frame);
- for (int i = 0; i < extra; ++i) {
- repeat_last_video ();
- _film->log()->log (
- String::compose (
- "Extra video frame inserted at %1s; source frame %2, source PTS %3 (at %4 fps)",
- out_pts_seconds, video_frame(), source_pts_seconds, frames_per_second()
- )
- );
- }
- }
-
- if (delta > -one_frame) {
- /* Process this frame */
- filter_and_emit_video (_frame);
- } else {
- /* Otherwise we are omitting a frame to keep things right */
- _film->log()->log (String::compose ("Frame removed at %1s", out_pts_seconds));
- }
+ return String::compose (N_("ffmpeg %1 %2 %3 %4"), _id, _sample_rate, _channel_layout, _name);
}
void
return (double(_format_context->duration) / AV_TIME_BASE) * frames_per_second();
}
-double
-FFmpegDecoder::frame_time () const
+void
+FFmpegDecoder::decode_audio_packet ()
{
- return av_frame_get_best_effort_timestamp(_frame) * av_q2d (_format_context->streams[_video_stream]->time_base);
-}
+ shared_ptr<FFmpegAudioStream> ffa = dynamic_pointer_cast<FFmpegAudioStream> (_audio_stream);
+ assert (ffa);
+
+ /* Audio packets can contain multiple frames, so we may have to call avcodec_decode_audio4
+ several times.
+ */
+
+ AVPacket copy_packet = _packet;
+
+ while (copy_packet.size > 0) {
+ int frame_finished;
+ int const decode_result = avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, ©_packet);
+ if (decode_result >= 0) {
+ if (frame_finished) {
+
+ /* Where we are in the source, in seconds */
+ double const source_pts_seconds = av_q2d (_format_context->streams[copy_packet.stream_index]->time_base)
+ * av_frame_get_best_effort_timestamp(_frame);
+
+ int const data_size = av_samples_get_buffer_size (
+ 0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
+ );
+
+ assert (_audio_codec_context->channels == _film->audio_channels());
+ Audio (deinterleave_audio (_frame->data, data_size), source_pts_seconds);
+ }
+
+ copy_packet.data += decode_result;
+ copy_packet.size -= decode_result;
+ }
+ }
+}
projects / dcpomatic.git / blobdiff