+/* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
+
/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
#include <iomanip>
#include <iostream>
#include <stdint.h>
+#include <boost/lexical_cast.hpp>
extern "C" {
#include <tiffio.h>
#include <libavcodec/avcodec.h>
#include "transcoder.h"
#include "job.h"
#include "filter.h"
-#include "film_state.h"
-#include "options.h"
#include "exceptions.h"
#include "image.h"
#include "util.h"
#include "log.h"
#include "ffmpeg_decoder.h"
-
-using namespace std;
-using namespace boost;
-
-FFmpegDecoder::FFmpegDecoder (boost::shared_ptr<const FilmState> s, boost::shared_ptr<const Options> o, Job* j, Log* l, bool minimal, bool ignore_length)
- : Decoder (s, o, j, l, minimal, ignore_length)
+#include "filter_graph.h"
+#include "subtitle.h"
+#include "audio_buffers.h"
+
+#include "i18n.h"
+
+using std::cout;
+using std::string;
+using std::vector;
+using std::stringstream;
+using std::list;
+using std::min;
+using boost::shared_ptr;
+using boost::optional;
+using boost::dynamic_pointer_cast;
+using libdcp::Size;
+
+boost::mutex FFmpegDecoder::_mutex;
+
+FFmpegDecoder::FFmpegDecoder (shared_ptr<const Film> f, shared_ptr<const FFmpegContent> c, bool video, bool audio, bool subtitles)
+ : Decoder (f)
+ , VideoDecoder (f, c)
+ , AudioDecoder (f, c)
+ , _ffmpeg_content (c)
, _format_context (0)
, _video_stream (-1)
- , _audio_stream (-1)
, _frame (0)
, _video_codec_context (0)
, _video_codec (0)
, _audio_codec_context (0)
, _audio_codec (0)
+ , _subtitle_codec_context (0)
+ , _subtitle_codec (0)
+ , _decode_video (video)
+ , _decode_audio (audio)
+ , _decode_subtitles (subtitles)
{
setup_general ();
setup_video ();
setup_audio ();
+ setup_subtitle ();
}
FFmpegDecoder::~FFmpegDecoder ()
{
+ boost::mutex::scoped_lock lm (_mutex);
+
if (_audio_codec_context) {
avcodec_close (_audio_codec_context);
}
-
+
if (_video_codec_context) {
avcodec_close (_video_codec_context);
}
-
+
+ if (_subtitle_codec_context) {
+ avcodec_close (_subtitle_codec_context);
+ }
+
av_free (_frame);
+
avformat_close_input (&_format_context);
}
void
FFmpegDecoder::setup_general ()
{
- int r;
-
av_register_all ();
- if ((r = avformat_open_input (&_format_context, _fs->content_path().c_str(), 0, 0)) != 0) {
- throw OpenFileError (_fs->content_path ());
+ if (avformat_open_input (&_format_context, _ffmpeg_content->file().string().c_str(), 0, 0) < 0) {
+ throw OpenFileError (_ffmpeg_content->file().string ());
}
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 */
+
for (uint32_t i = 0; i < _format_context->nb_streams; ++i) {
- if (_format_context->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ AVStream* s = _format_context->streams[i];
+ if (s->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
_video_stream = i;
- } else if (_format_context->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
- _audio_stream = i;
+ } else if (s->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+
+ /* This is a hack; sometimes it seems that _audio_codec_context->channel_layout isn't set up,
+ so bodge it here. No idea why we should have to do this.
+ */
+
+ if (s->codec->channel_layout == 0) {
+ s->codec->channel_layout = av_get_default_channel_layout (s->codec->channels);
+ }
+
+ _audio_streams.push_back (
+ shared_ptr<FFmpegAudioStream> (
+ new FFmpegAudioStream (stream_name (s), i, 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)));
}
}
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"));
}
}
void
FFmpegDecoder::setup_video ()
{
+ boost::mutex::scoped_lock lm (_mutex);
+
_video_codec_context = _format_context->streams[_video_stream]->codec;
_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"));
}
}
void
FFmpegDecoder::setup_audio ()
{
- if (_audio_stream < 0) {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_ffmpeg_content->audio_stream ()) {
return;
}
-
- _audio_codec_context = _format_context->streams[_audio_stream]->codec;
+
+ _audio_codec_context = _format_context->streams[_ffmpeg_content->audio_stream()->id]->codec;
_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"));
}
+}
- /* This is a hack; sometimes it seems that _audio_codec_context->channel_layout isn't set up,
- so bodge it here. No idea why we should have to do this.
- */
+void
+FFmpegDecoder::setup_subtitle ()
+{
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_ffmpeg_content->subtitle_stream() || _ffmpeg_content->subtitle_stream()->id >= int (_format_context->nb_streams)) {
+ return;
+ }
+
+ _subtitle_codec_context = _format_context->streams[_ffmpeg_content->subtitle_stream()->id]->codec;
+ _subtitle_codec = avcodec_find_decoder (_subtitle_codec_context->codec_id);
- if (_audio_codec_context->channel_layout == 0) {
- _audio_codec_context->channel_layout = av_get_default_channel_layout (audio_channels ());
+ if (_subtitle_codec == 0) {
+ throw DecodeError (_("could not find subtitle decoder"));
+ }
+
+ if (avcodec_open2 (_subtitle_codec_context, _subtitle_codec, 0) < 0) {
+ throw DecodeError (N_("could not open subtitle decoder"));
}
}
-bool
-FFmpegDecoder::do_pass ()
+
+void
+FFmpegDecoder::pass ()
{
int r = av_read_frame (_format_context, &_packet);
- if (r < 0) {
- return true;
- }
- if (_packet.stream_index == _video_stream && _opt->decode_video) {
-
- int frame_finished;
- if (avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- process_video (_frame);
+ if (r < 0) {
+ if (r != AVERROR_EOF) {
+ /* Maybe we should fail here, but for now we'll just finish off instead */
+ char buf[256];
+ av_strerror (r, buf, sizeof(buf));
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+ film->log()->log (String::compose (N_("error on av_read_frame (%1) (%2)"), buf, r));
}
- } else if (_audio_stream >= 0 && _packet.stream_index == _audio_stream && _opt->decode_audio) {
+ /* Get any remaining frames */
- avcodec_get_frame_defaults (_frame);
+ _packet.data = 0;
+ _packet.size = 0;
- int frame_finished;
- if (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
- );
+ /* XXX: should we reset _packet.data and size after each *_decode_* call? */
+
+ if (_decode_video) {
+ while (decode_video_packet ());
+ }
- assert (_audio_codec_context->channels == _fs->audio_channels);
- process_audio (_frame->data[0], data_size);
+ if (_ffmpeg_content->audio_stream() && _decode_audio) {
+ decode_audio_packet ();
}
+
+ return;
}
-
- av_free_packet (&_packet);
- return false;
-}
-int
-FFmpegDecoder::length_in_frames () const
-{
- return (_format_context->duration / AV_TIME_BASE) * frames_per_second ();
-}
+ avcodec_get_frame_defaults (_frame);
+
+ if (_packet.stream_index == _video_stream && _decode_video) {
+ decode_video_packet ();
+ } else if (_ffmpeg_content->audio_stream() && _packet.stream_index == _ffmpeg_content->audio_stream()->id && _decode_audio) {
+ decode_audio_packet ();
+ } else if (_ffmpeg_content->subtitle_stream() && _packet.stream_index == _ffmpeg_content->subtitle_stream()->id && _decode_subtitles) {
+
+ int got_subtitle;
+ AVSubtitle sub;
+ if (avcodec_decode_subtitle2 (_subtitle_codec_context, &sub, &got_subtitle, &_packet) && got_subtitle) {
+ /* Sometimes we get an empty AVSubtitle, which is used by some codecs to
+ indicate that the previous subtitle should stop.
+ */
+ if (sub.num_rects > 0) {
+ shared_ptr<TimedSubtitle> ts;
+ try {
+ subtitle (shared_ptr<TimedSubtitle> (new TimedSubtitle (sub)));
+ } catch (...) {
+ /* some problem with the subtitle; we probably didn't understand it */
+ }
+ } else {
+ subtitle (shared_ptr<TimedSubtitle> ());
+ }
+ avsubtitle_free (&sub);
+ }
+ }
-float
-FFmpegDecoder::frames_per_second () const
-{
- return av_q2d (_format_context->streams[_video_stream]->avg_frame_rate);
+ av_free_packet (&_packet);
}
-int
-FFmpegDecoder::audio_channels () const
+/** @param data pointer to array of pointers to buffers.
+ * Only the first buffer will be used for non-planar data, otherwise there will be one per channel.
+ */
+shared_ptr<AudioBuffers>
+FFmpegDecoder::deinterleave_audio (uint8_t** data, int size)
{
- if (_audio_codec_context == 0) {
- return 0;
+ assert (_ffmpeg_content->audio_channels());
+ assert (bytes_per_audio_sample());
+
+ /* Deinterleave and convert to float */
+
+ assert ((size % (bytes_per_audio_sample() * _ffmpeg_content->audio_channels())) == 0);
+
+ int const total_samples = size / bytes_per_audio_sample();
+ int const frames = total_samples / _ffmpeg_content->audio_channels();
+ shared_ptr<AudioBuffers> audio (new AudioBuffers (_ffmpeg_content->audio_channels(), frames));
+
+ switch (audio_sample_format()) {
+ case AV_SAMPLE_FMT_S16:
+ {
+ int16_t* p = reinterpret_cast<int16_t *> (data[0]);
+ int sample = 0;
+ int channel = 0;
+ for (int i = 0; i < total_samples; ++i) {
+ audio->data(channel)[sample] = float(*p++) / (1 << 15);
+
+ ++channel;
+ if (channel == _ffmpeg_content->audio_channels()) {
+ channel = 0;
+ ++sample;
+ }
+ }
+ }
+ break;
+
+ case AV_SAMPLE_FMT_S16P:
+ {
+ int16_t** p = reinterpret_cast<int16_t **> (data);
+ for (int i = 0; i < _ffmpeg_content->audio_channels(); ++i) {
+ for (int j = 0; j < frames; ++j) {
+ audio->data(i)[j] = static_cast<float>(p[i][j]) / (1 << 15);
+ }
+ }
+ }
+ break;
+
+ case AV_SAMPLE_FMT_S32:
+ {
+ int32_t* p = reinterpret_cast<int32_t *> (data[0]);
+ int sample = 0;
+ int channel = 0;
+ for (int i = 0; i < total_samples; ++i) {
+ audio->data(channel)[sample] = static_cast<float>(*p++) / (1 << 31);
+
+ ++channel;
+ if (channel == _ffmpeg_content->audio_channels()) {
+ channel = 0;
+ ++sample;
+ }
+ }
+ }
+ break;
+
+ case AV_SAMPLE_FMT_FLT:
+ {
+ float* p = reinterpret_cast<float*> (data[0]);
+ int sample = 0;
+ int channel = 0;
+ for (int i = 0; i < total_samples; ++i) {
+ audio->data(channel)[sample] = *p++;
+
+ ++channel;
+ if (channel == _ffmpeg_content->audio_channels()) {
+ channel = 0;
+ ++sample;
+ }
+ }
+ }
+ break;
+
+ case AV_SAMPLE_FMT_FLTP:
+ {
+ float** p = reinterpret_cast<float**> (data);
+ for (int i = 0; i < _ffmpeg_content->audio_channels(); ++i) {
+ memcpy (audio->data(i), p[i], frames * sizeof(float));
+ }
+ }
+ break;
+
+ default:
+ throw DecodeError (String::compose (_("Unrecognised audio sample format (%1)"), static_cast<int> (audio_sample_format())));
}
- return _audio_codec_context->channels;
+ return audio;
}
-int
-FFmpegDecoder::audio_sample_rate () const
+float
+FFmpegDecoder::video_frame_rate () const
{
- if (_audio_codec_context == 0) {
- return 0;
+ AVStream* s = _format_context->streams[_video_stream];
+
+ if (s->avg_frame_rate.num && s->avg_frame_rate.den) {
+ return av_q2d (s->avg_frame_rate);
}
-
- return _audio_codec_context->sample_rate;
+
+ return av_q2d (s->r_frame_rate);
}
AVSampleFormat
return _audio_codec_context->sample_fmt;
}
-int64_t
-FFmpegDecoder::audio_channel_layout () const
+libdcp::Size
+FFmpegDecoder::video_size () const
{
- if (_audio_codec_context == 0) {
- return 0;
+ return libdcp::Size (_video_codec_context->width, _video_codec_context->height);
+}
+
+string
+FFmpegDecoder::stream_name (AVStream* s) const
+{
+ stringstream 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;
+ }
}
-
- return _audio_codec_context->channel_layout;
+
+ if (n.str().empty()) {
+ n << N_("unknown");
+ }
+
+ return n.str ();
}
-Size
-FFmpegDecoder::native_size () const
+int
+FFmpegDecoder::bytes_per_audio_sample () const
{
- return Size (_video_codec_context->width, _video_codec_context->height);
+ return av_get_bytes_per_sample (audio_sample_format ());
}
-PixelFormat
-FFmpegDecoder::pixel_format () const
+void
+FFmpegDecoder::seek (Time t)
{
- return _video_codec_context->pix_fmt;
+ do_seek (t, false, false);
}
-int
-FFmpegDecoder::time_base_numerator () const
+void
+FFmpegDecoder::seek_back ()
{
- return _video_codec_context->time_base.num;
+ if (next() < (2.5 * TIME_HZ / video_frame_rate())) {
+ return;
+ }
+
+ do_seek (next() - 2.5 * TIME_HZ / video_frame_rate(), true, true);
}
-int
-FFmpegDecoder::time_base_denominator () const
+void
+FFmpegDecoder::seek_forward ()
{
- return _video_codec_context->time_base.den;
+ if (next() >= (_ffmpeg_content->length() - 0.5 * TIME_HZ / video_frame_rate())) {
+ return;
+ }
+
+ do_seek (next() - 0.5 * TIME_HZ / video_frame_rate(), true, true);
}
-int
-FFmpegDecoder::sample_aspect_ratio_numerator () const
+void
+FFmpegDecoder::do_seek (Time t, bool backwards, bool accurate)
{
- return _video_codec_context->sample_aspect_ratio.num;
+ int64_t const vt = t / (av_q2d (_format_context->streams[_video_stream]->time_base) * TIME_HZ);
+ 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;
+ }
+
+ 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;
}
-int
-FFmpegDecoder::sample_aspect_ratio_denominator () const
+/** @return Length (in video frames) according to our content's header */
+ContentVideoFrame
+FFmpegDecoder::video_length () const
+{
+ return (double(_format_context->duration) / AV_TIME_BASE) * video_frame_rate();
+}
+
+void
+FFmpegDecoder::decode_audio_packet ()
{
- return _video_codec_context->sample_aspect_ratio.den;
+ /* 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 == _ffmpeg_content->audio_channels());
+ Audio (deinterleave_audio (_frame->data, data_size), source_pts_seconds);
+ }
+
+ copy_packet.data += decode_result;
+ copy_packet.size -= decode_result;
+ }
+ }
}
+bool
+FFmpegDecoder::decode_video_packet ()
+{
+ int frame_finished;
+ if (avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet) < 0 || !frame_finished) {
+ return false;
+ }
+
+ 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)) {
+ ++i;
+ }
+
+ if (i == _filter_graphs.end ()) {
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+
+ graph.reset (new FilterGraph (_ffmpeg_content, libdcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format));
+ _filter_graphs.push_back (graph);
+
+ 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);
+
+ string post_process = Filter::ffmpeg_strings (_ffmpeg_content->filters()).second;
+
+ for (list<shared_ptr<Image> >::iterator i = images.begin(); i != images.end(); ++i) {
+
+ shared_ptr<Image> image = *i;
+ if (!post_process.empty ()) {
+ image = image->post_process (post_process, true);
+ }
+
+ int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ if (bet != AV_NOPTS_VALUE) {
+ /* XXX: may need to insert extra frames / remove frames here ...
+ (as per old Matcher)
+ */
+ Time const t = bet * av_q2d (_format_context->streams[_video_stream]->time_base) * TIME_HZ;
+ video (image, false, t);
+ } else {
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+ film->log()->log ("Dropping frame without PTS");
+ }
+ }
+
+ return true;
+}
+
+Time
+FFmpegDecoder::next () const
+{
+ if (_decode_video && _decode_audio) {
+ return min (_next_video, _next_audio);
+ }
+
+ if (_decode_audio) {
+ return _next_audio;
+ }
+
+ return _next_video;
+}
projects / dcpomatic.git / blobdiff