#include "ffmpeg_examiner.h"
#include "ffmpeg_content.h"
+#include "i18n.h"
+
using std::string;
+using std::cout;
+using std::max;
using std::stringstream;
using boost::shared_ptr;
+using boost::optional;
FFmpegExaminer::FFmpegExaminer (shared_ptr<const FFmpegContent> c)
: FFmpeg (c)
_audio_streams.push_back (
shared_ptr<FFmpegAudioStream> (
- new FFmpegAudioStream (stream_name (s), i, s->codec->sample_rate, s->codec->channels)
+ new FFmpegAudioStream (audio_stream_name (s), s->id, s->codec->sample_rate, s->codec->channels)
)
);
} else if (s->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
- _subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (stream_name (s), i)));
+ _subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (subtitle_stream_name (s), s->id)));
}
}
+ /* Run through until we find the first audio (for each stream) and video */
+
+ while (1) {
+ int r = av_read_frame (_format_context, &_packet);
+ if (r < 0) {
+ break;
+ }
+
+ int frame_finished;
+
+ AVCodecContext* context = _format_context->streams[_packet.stream_index]->codec;
+
+ if (_packet.stream_index == _video_stream && !_first_video) {
+ if (avcodec_decode_video2 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
+ _first_video = frame_time (_video_stream);
+ }
+ } else {
+ for (size_t i = 0; i < _audio_streams.size(); ++i) {
+ if (_packet.stream_index == _audio_streams[i]->index (_format_context) && !_audio_streams[i]->first_audio) {
+ if (avcodec_decode_audio4 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
+ _audio_streams[i]->first_audio = frame_time (_audio_streams[i]->index (_format_context));
+ }
+ }
+ }
+ }
+
+ bool have_all_audio = true;
+ size_t i = 0;
+ while (i < _audio_streams.size() && have_all_audio) {
+ have_all_audio = _audio_streams[i]->first_audio;
+ ++i;
+ }
+
+ av_free_packet (&_packet);
+
+ if (_first_video && have_all_audio) {
+ break;
+ }
+ }
+}
+
+optional<double>
+FFmpegExaminer::frame_time (int stream) const
+{
+ optional<double> t;
+
+ int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ if (bet != AV_NOPTS_VALUE) {
+ t = bet * av_q2d (_format_context->streams[stream]->time_base);
+ }
+
+ return t;
}
float
libdcp::Size
FFmpegExaminer::video_size () const
{
- return libdcp::Size (_video_codec_context->width, _video_codec_context->height);
+ return libdcp::Size (video_codec_context()->width, video_codec_context()->height);
}
/** @return Length (in video frames) according to our content's header */
-ContentVideoFrame
+VideoFrame
FFmpegExaminer::video_length () const
{
- return (double (_format_context->duration) / AV_TIME_BASE) * video_frame_rate();
+ VideoFrame const length = (double (_format_context->duration) / AV_TIME_BASE) * video_frame_rate();
+ return max (1, length);
+}
+
+string
+FFmpegExaminer::audio_stream_name (AVStream* s) const
+{
+ stringstream n;
+
+ n << stream_name (s);
+
+ if (!n.str().empty()) {
+ n << "; ";
+ }
+
+ n << s->codec->channels << " channels";
+
+ return n.str ();
+}
+
+string
+FFmpegExaminer::subtitle_stream_name (AVStream* s) const
+{
+ stringstream n;
+
+ n << stream_name (s);
+
+ if (n.str().empty()) {
+ n << _("unknown");
+ }
+
+ return n.str ();
}
string
}
}
- if (n.str().empty()) {
- n << "unknown";
- }
-
return n.str ();
}