using boost::bind;
using boost::weak_ptr;
+int FFmpegEncoder::_video_stream_index = 0;
+int FFmpegEncoder::_audio_stream_index = 1;
+
static AVPixelFormat
force_pixel_format (AVPixelFormat, AVPixelFormat out)
{
FFmpegEncoder::FFmpegEncoder (shared_ptr<const Film> film, weak_ptr<Job> job, boost::filesystem::path output, Format format)
: Encoder (film, job)
- , _options (0)
+ , _video_options (0)
, _history (1000)
, _output (output)
+ , _pending_audio (new AudioBuffers (film->audio_channels(), 0))
{
switch (format) {
case FORMAT_PRORES:
_pixel_format = AV_PIX_FMT_YUV422P10;
- _codec_name = "prores_ks";
- av_dict_set (&_options, "profile", "3", 0);
- av_dict_set (&_options, "threads", "auto", 0);
+ _sample_format = AV_SAMPLE_FMT_S16;
+ _video_codec_name = "prores_ks";
+ _audio_codec_name = "pcm_s16le";
+ av_dict_set (&_video_options, "profile", "3", 0);
+ av_dict_set (&_video_options, "threads", "auto", 0);
break;
case FORMAT_H264:
_pixel_format = AV_PIX_FMT_YUV420P;
- _codec_name = "libx264";
+ _sample_format = AV_SAMPLE_FMT_FLTP;
+ _video_codec_name = "libx264";
+ _audio_codec_name = "aac";
break;
}
}
void
-FFmpegEncoder::go ()
+FFmpegEncoder::setup_video ()
{
- AVCodec* codec = avcodec_find_encoder_by_name (_codec_name.c_str());
- if (!codec) {
- throw runtime_error (String::compose ("could not find FFmpeg encoder %1", _codec_name));
+ _video_codec = avcodec_find_encoder_by_name (_video_codec_name.c_str());
+ if (!_video_codec) {
+ throw runtime_error (String::compose ("could not find FFmpeg encoder %1", _video_codec_name));
}
- _codec_context = avcodec_alloc_context3 (codec);
- if (!_codec_context) {
- throw runtime_error ("could not allocate FFmpeg context");
+ _video_codec_context = avcodec_alloc_context3 (_video_codec);
+ if (!_video_codec_context) {
+ throw runtime_error ("could not allocate FFmpeg video context");
}
- avcodec_get_context_defaults3 (_codec_context, codec);
+ avcodec_get_context_defaults3 (_video_codec_context, _video_codec);
/* Variable quantisation */
- _codec_context->global_quality = 0;
- _codec_context->width = _film->frame_size().width;
- _codec_context->height = _film->frame_size().height;
- _codec_context->time_base = (AVRational) { 1, _film->video_frame_rate() };
- _codec_context->pix_fmt = _pixel_format;
- _codec_context->flags |= CODEC_FLAG_QSCALE | CODEC_FLAG_GLOBAL_HEADER;
+ _video_codec_context->global_quality = 0;
+ _video_codec_context->width = _film->frame_size().width;
+ _video_codec_context->height = _film->frame_size().height;
+ _video_codec_context->time_base = (AVRational) { 1, _film->video_frame_rate() };
+ _video_codec_context->pix_fmt = _pixel_format;
+ _video_codec_context->flags |= CODEC_FLAG_QSCALE | CODEC_FLAG_GLOBAL_HEADER;
+}
+
+void
+FFmpegEncoder::setup_audio ()
+{
+ _audio_codec = avcodec_find_encoder_by_name (_audio_codec_name.c_str());
+ if (!_audio_codec) {
+ throw runtime_error (String::compose ("could not find FFmpeg encoder %1", _audio_codec_name));
+ }
+
+ _audio_codec_context = avcodec_alloc_context3 (_audio_codec);
+ if (!_audio_codec_context) {
+ throw runtime_error ("could not allocate FFmpeg audio context");
+ }
+
+ avcodec_get_context_defaults3 (_audio_codec_context, _audio_codec);
+
+ /* XXX: configurable */
+ _audio_codec_context->bit_rate = 256 * 1024;
+ _audio_codec_context->sample_fmt = _sample_format;
+ _audio_codec_context->sample_rate = _film->audio_frame_rate ();
+ _audio_codec_context->channel_layout = av_get_default_channel_layout (_film->audio_channels ());
+ _audio_codec_context->channels = _film->audio_channels ();
+}
+
+void
+FFmpegEncoder::go ()
+{
+ setup_video ();
+ setup_audio ();
avformat_alloc_output_context2 (&_format_context, 0, 0, _output.string().c_str());
if (!_format_context) {
throw runtime_error ("could not allocate FFmpeg format context");
}
- _video_stream = avformat_new_stream (_format_context, codec);
+ _video_stream = avformat_new_stream (_format_context, _video_codec);
if (!_video_stream) {
throw runtime_error ("could not create FFmpeg output video stream");
}
- /* Note: needs to increment with each stream */
- _video_stream->id = 0;
- _video_stream->codec = _codec_context;
+ _audio_stream = avformat_new_stream (_format_context, _audio_codec);
+ if (!_audio_stream) {
+ throw runtime_error ("could not create FFmpeg output audio stream");
+ }
+
+ _video_stream->id = _video_stream_index;
+ _video_stream->codec = _video_codec_context;
+
+ _audio_stream->id = _audio_stream_index;
+ _audio_stream->codec = _audio_codec_context;
- if (avcodec_open2 (_codec_context, codec, &_options) < 0) {
- throw runtime_error ("could not open FFmpeg codec");
+ if (avcodec_open2 (_video_codec_context, _video_codec, &_video_options) < 0) {
+ throw runtime_error ("could not open FFmpeg video codec");
+ }
+
+ int r = avcodec_open2 (_audio_codec_context, _audio_codec, 0);
+ if (r < 0) {
+ char buffer[256];
+ av_strerror (r, buffer, sizeof(buffer));
+ throw runtime_error (String::compose ("could not open FFmpeg audio codec (%1)", buffer));
}
if (avio_open (&_format_context->pb, _output.c_str(), AVIO_FLAG_WRITE) < 0) {
throw runtime_error ("could not open FFmpeg output file");
}
- if (avformat_write_header (_format_context, &_options) < 0) {
+ if (avformat_write_header (_format_context, 0) < 0) {
throw runtime_error ("could not write header to FFmpeg output file");
}
while (!_player->pass ()) {}
- while (true) {
+ if (_pending_audio->frames() > 0) {
+ audio_frame (_pending_audio->frames ());
+ }
+
+ /* Flush */
+
+ bool flushed_video = false;
+ bool flushed_audio = false;
+
+ while (!flushed_video || !flushed_audio) {
AVPacket packet;
av_init_packet (&packet);
packet.data = 0;
packet.size = 0;
int got_packet;
- avcodec_encode_video2 (_codec_context, &packet, 0, &got_packet);
- if (!got_packet) {
- break;
+ avcodec_encode_video2 (_video_codec_context, &packet, 0, &got_packet);
+ if (got_packet) {
+ packet.stream_index = 0;
+ av_interleaved_write_frame (_format_context, &packet);
+ } else {
+ flushed_video = true;
}
+ av_packet_unref (&packet);
- packet.stream_index = 0;
- av_interleaved_write_frame (_format_context, &packet);
+ av_init_packet (&packet);
+ packet.data = 0;
+ packet.size = 0;
+
+ avcodec_encode_audio2 (_video_codec_context, &packet, 0, &got_packet);
+ if (got_packet) {
+ packet.stream_index = 0;
+ av_interleaved_write_frame (_format_context, &packet);
+ } else {
+ flushed_audio = true;
+ }
av_packet_unref (&packet);
}
av_write_trailer (_format_context);
- avcodec_close (_codec_context);
+ avcodec_close (_video_codec_context);
+ avcodec_close (_audio_codec_context);
avio_close (_format_context->pb);
avformat_free_context (_format_context);
}
);
AVFrame* frame = av_frame_alloc ();
+ DCPOMATIC_ASSERT (frame);
for (int i = 0; i < 3; ++i) {
size_t const size = image->stride()[i] * image->size().height;
AVBufferRef* buffer = av_buffer_alloc (size);
+ DCPOMATIC_ASSERT (buffer);
/* XXX: inefficient */
memcpy (buffer->data, image->data()[i], size);
frame->buf[i] = av_buffer_ref (buffer);
packet.size = 0;
int got_packet;
- if (avcodec_encode_video2 (_codec_context, &packet, frame, &got_packet) < 0) {
+ if (avcodec_encode_video2 (_video_codec_context, &packet, frame, &got_packet) < 0) {
throw EncodeError ("FFmpeg video encode failed");
}
if (got_packet && packet.size) {
- /* XXX: this should not be hard-wired */
- packet.stream_index = 0;
+ packet.stream_index = _video_stream_index;
av_interleaved_write_frame (_format_context, &packet);
av_packet_unref (&packet);
}
void
FFmpegEncoder::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
{
+ _pending_audio->append (audio);
+
+ while (_pending_audio->frames() >= _audio_codec_context->frame_size) {
+ audio_frame (_audio_codec_context->frame_size);
+ }
+}
+
+void
+FFmpegEncoder::audio_frame (int size)
+{
+ AVFrame* frame = av_frame_alloc ();
+ DCPOMATIC_ASSERT (frame);
+
+ int const channels = _audio_codec_context->channels;
+
+ int const buffer_size = av_samples_get_buffer_size (0, channels, size, _audio_codec_context->sample_fmt, 0);
+ DCPOMATIC_ASSERT (buffer_size >= 0);
+
+ void* samples = av_malloc (buffer_size);
+ DCPOMATIC_ASSERT (samples);
+
+ frame->nb_samples = size;
+ int r = avcodec_fill_audio_frame (frame, channels, _audio_codec_context->sample_fmt, (const uint8_t *) samples, buffer_size, 0);
+ DCPOMATIC_ASSERT (r >= 0);
+
+ float** p = _pending_audio->data ();
+ switch (_audio_codec_context->sample_fmt) {
+ case AV_SAMPLE_FMT_S16:
+ {
+ int16_t* q = reinterpret_cast<int16_t*> (samples);
+ for (int i = 0; i < size; ++i) {
+ for (int j = 0; j < channels; ++i) {
+ *q++ = p[j][i] * 32767;
+ }
+ }
+ break;
+ }
+ case AV_SAMPLE_FMT_FLTP:
+ {
+ float* q = reinterpret_cast<float*> (samples);
+ for (int i = 0; i < channels; ++i) {
+ memcpy (q, p[i], sizeof(float) * size);
+ q += size;
+ }
+ break;
+ }
+ default:
+ DCPOMATIC_ASSERT (false);
+ }
+
+ AVPacket packet;
+ av_init_packet (&packet);
+ packet.data = 0;
+ packet.size = 0;
+
+ int got_packet;
+ if (avcodec_encode_audio2 (_audio_codec_context, &packet, frame, &got_packet) < 0) {
+ throw EncodeError ("FFmpeg audio encode failed");
+ }
+
+ if (got_packet && packet.size) {
+ packet.stream_index = _audio_stream_index;
+ av_interleaved_write_frame (_format_context, &packet);
+ av_packet_unref (&packet);
+ }
+
+ av_free (samples);
+ av_frame_free (&frame);
+ _pending_audio->trim_start (size);
}
void
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