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Differential D2716 Diff 8940 extern/audaspace/plugins/ffmpeg/FFMPEGWriter.cpp

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extern/audaspace/plugins/ffmpeg/FFMPEGWriter.cpp

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/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#include "FFMPEGWriter.h"
#include "Exception.h"
#include <algorithm>
#include <cstring>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avio.h>
}
AUD_NAMESPACE_BEGIN
void FFMPEGWriter::encode()
{
sample_t* data = m_input_buffer.getBuffer();
if(m_deinterleave)
{
m_deinterleave_buffer.assureSize(m_input_buffer.getSize());
sample_t* dbuf = m_deinterleave_buffer.getBuffer();
// deinterleave
int single_size = sizeof(sample_t);
for(int channel = 0; channel < m_specs.channels; channel++)
{
for(int i = 0; i < m_input_buffer.getSize() / AUD_SAMPLE_SIZE(m_specs); i++)
{
std::memcpy(((data_t*)dbuf) + (m_input_samples * channel + i) * single_size,
((data_t*)data) + ((m_specs.channels * i) + channel) * single_size, single_size);
}
}
// convert first
if(m_input_size)
m_convert(reinterpret_cast<data_t*>(data), reinterpret_cast<data_t*>(dbuf), m_input_samples * m_specs.channels);
else
std::memcpy(data, dbuf, m_input_buffer.getSize());
}
else
// convert first
if(m_input_size)
m_convert(reinterpret_cast<data_t*>(data), reinterpret_cast<data_t*>(data), m_input_samples * m_specs.channels);
AVPacket packet;
packet.data = nullptr;
packet.size = 0;
av_init_packet(&packet);
AVFrame* frame = av_frame_alloc();
av_frame_unref(frame);
int got_packet;
frame->nb_samples = m_input_samples;
frame->format = m_codecCtx->sample_fmt;
frame->channel_layout = m_codecCtx->channel_layout;
if(avcodec_fill_audio_frame(frame, m_specs.channels, m_codecCtx->sample_fmt, reinterpret_cast<data_t*>(data), m_input_buffer.getSize(), 0) < 0)
AUD_THROW(FileException, "File couldn't be written, filling the audio frame failed with ffmpeg.");
AVRational sample_time = { 1, static_cast<int>(m_specs.rate) };
frame->pts = av_rescale_q(m_position - m_input_samples, m_codecCtx->time_base, sample_time);
if(avcodec_encode_audio2(m_codecCtx, &packet, frame, &got_packet))
{
av_frame_free(&frame);
AUD_THROW(FileException, "File couldn't be written, audio encoding failed with ffmpeg.");
}
if(got_packet)
{
packet.flags |= AV_PKT_FLAG_KEY;
packet.stream_index = m_stream->index;
if(av_write_frame(m_formatCtx, &packet) < 0)
{
av_free_packet(&packet);
av_frame_free(&frame);
AUD_THROW(FileException, "Frame couldn't be writen to the file with ffmpeg.");
}
av_free_packet(&packet);
}
av_frame_free(&frame);
}
void FFMPEGWriter::close()
{
int got_packet = true;
while(got_packet)
{
AVPacket packet;
packet.data = nullptr;
packet.size = 0;
av_init_packet(&packet);
if(avcodec_encode_audio2(m_codecCtx, &packet, nullptr, &got_packet))
AUD_THROW(FileException, "File end couldn't be written, audio encoding failed with ffmpeg.");
if(got_packet)
{
packet.flags |= AV_PKT_FLAG_KEY;
packet.stream_index = m_stream->index;
if(av_write_frame(m_formatCtx, &packet))
{
av_free_packet(&packet);
AUD_THROW(FileException, "Final frames couldn't be writen to the file with ffmpeg.");
}
av_free_packet(&packet);
}
}
}
FFMPEGWriter::FFMPEGWriter(std::string filename, DeviceSpecs specs, Container format, Codec codec, unsigned int bitrate) :
m_position(0),
m_specs(specs),
m_input_samples(0),
m_deinterleave(false)
{
static const char* formats[] = { nullptr, "ac3", "flac", "matroska", "mp2", "mp3", "ogg", "wav" };
if(avformat_alloc_output_context2(&m_formatCtx, nullptr, formats[format], filename.c_str()) < 0)
AUD_THROW(FileException, "File couldn't be written, format couldn't be found with ffmpeg.");
m_outputFmt = m_formatCtx->oformat;
if(!m_outputFmt) {
avformat_free_context(m_formatCtx);
AUD_THROW(FileException, "File couldn't be written, output format couldn't be found with ffmpeg.");
}
m_outputFmt->audio_codec = AV_CODEC_ID_NONE;
switch(codec)
{
case CODEC_AAC:
m_outputFmt->audio_codec = AV_CODEC_ID_AAC;
break;
case CODEC_AC3:
m_outputFmt->audio_codec = AV_CODEC_ID_AC3;
break;
case CODEC_FLAC:
m_outputFmt->audio_codec = AV_CODEC_ID_FLAC;
break;
case CODEC_MP2:
m_outputFmt->audio_codec = AV_CODEC_ID_MP2;
break;
case CODEC_MP3:
m_outputFmt->audio_codec = AV_CODEC_ID_MP3;
break;
case CODEC_OPUS:
m_outputFmt->audio_codec = AV_CODEC_ID_OPUS;
break;
case CODEC_PCM:
switch(specs.format)
{
case FORMAT_U8:
m_outputFmt->audio_codec = AV_CODEC_ID_PCM_U8;
break;
case FORMAT_S16:
m_outputFmt->audio_codec = AV_CODEC_ID_PCM_S16LE;
break;
case FORMAT_S24:
m_outputFmt->audio_codec = AV_CODEC_ID_PCM_S24LE;
break;
case FORMAT_S32:
m_outputFmt->audio_codec = AV_CODEC_ID_PCM_S32LE;
break;
case FORMAT_FLOAT32:
m_outputFmt->audio_codec = AV_CODEC_ID_PCM_F32LE;
break;
case FORMAT_FLOAT64:
m_outputFmt->audio_codec = AV_CODEC_ID_PCM_F64LE;
break;
default:
m_outputFmt->audio_codec = AV_CODEC_ID_NONE;
break;
}
break;
case CODEC_VORBIS:
m_outputFmt->audio_codec = AV_CODEC_ID_VORBIS;
break;
default:
m_outputFmt->audio_codec = AV_CODEC_ID_NONE;
break;
}
try
{
if(m_outputFmt->audio_codec == AV_CODEC_ID_NONE)
AUD_THROW(FileException, "File couldn't be written, audio codec not found with ffmpeg.");
AVCodec* codec = avcodec_find_encoder(m_outputFmt->audio_codec);
if(!codec)
AUD_THROW(FileException, "File couldn't be written, audio encoder couldn't be found with ffmpeg.");
m_stream = avformat_new_stream(m_formatCtx, codec);
if(!m_stream)
AUD_THROW(FileException, "File couldn't be written, stream creation failed with ffmpeg.");
m_stream->id = m_formatCtx->nb_streams - 1;
m_codecCtx = m_stream->codec;
switch(m_specs.format)
{
case FORMAT_U8:
m_convert = convert_float_u8;
m_codecCtx->sample_fmt = AV_SAMPLE_FMT_U8;
break;
case FORMAT_S16:
m_convert = convert_float_s16;
m_codecCtx->sample_fmt = AV_SAMPLE_FMT_S16;
break;
case FORMAT_S32:
m_convert = convert_float_s32;
m_codecCtx->sample_fmt = AV_SAMPLE_FMT_S32;
break;
case FORMAT_FLOAT64:
m_convert = convert_float_double;
m_codecCtx->sample_fmt = AV_SAMPLE_FMT_DBL;
break;
default:
m_convert = convert_copy<sample_t>;
m_codecCtx->sample_fmt = AV_SAMPLE_FMT_FLT;
break;
}
if(m_formatCtx->oformat->flags & AVFMT_GLOBALHEADER)
m_codecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;
bool format_supported = false;
for(int i = 0; codec->sample_fmts[i] != -1; i++)
{
if(av_get_alt_sample_fmt(codec->sample_fmts[i], false) == m_codecCtx->sample_fmt)
{
m_deinterleave = av_sample_fmt_is_planar(codec->sample_fmts[i]);
m_codecCtx->sample_fmt = codec->sample_fmts[i];
format_supported = true;
}
}
if(!format_supported)
{
int chosen_index = 0;
auto chosen = av_get_alt_sample_fmt(codec->sample_fmts[chosen_index], false);
for(int i = 1; codec->sample_fmts[i] != -1; i++)
{
auto fmt = av_get_alt_sample_fmt(codec->sample_fmts[i], false);
if((fmt > chosen && chosen < m_codecCtx->sample_fmt) || (fmt > m_codecCtx->sample_fmt && fmt < chosen))
{
chosen = fmt;
chosen_index = i;
}
}
m_codecCtx->sample_fmt = codec->sample_fmts[chosen_index];
m_deinterleave = av_sample_fmt_is_planar(m_codecCtx->sample_fmt);
switch(av_get_alt_sample_fmt(m_codecCtx->sample_fmt, false))
{
case AV_SAMPLE_FMT_U8:
specs.format = FORMAT_U8;
m_convert = convert_float_u8;
break;
case AV_SAMPLE_FMT_S16:
specs.format = FORMAT_S16;
m_convert = convert_float_s16;
break;
case AV_SAMPLE_FMT_S32:
specs.format = FORMAT_S32;
m_convert = convert_float_s32;
break;
case AV_SAMPLE_FMT_FLT:
specs.format = FORMAT_FLOAT32;
m_convert = convert_copy<sample_t>;
break;
case AV_SAMPLE_FMT_DBL:
specs.format = FORMAT_FLOAT64;
m_convert = convert_float_double;
break;
default:
AUD_THROW(FileException, "File couldn't be written, sample format not supported with ffmpeg.");
}
}
m_codecCtx->sample_rate = 0;
if(codec->supported_samplerates)
{
for(int i = 0; codec->supported_samplerates[i]; i++)
{
if(codec->supported_samplerates[i] == m_specs.rate)
{
m_codecCtx->sample_rate = codec->supported_samplerates[i];
break;
}
else if((codec->supported_samplerates[i] > m_codecCtx->sample_rate && m_specs.rate > m_codecCtx->sample_rate) ||
(codec->supported_samplerates[i] < m_codecCtx->sample_rate && m_specs.rate < codec->supported_samplerates[i]))
{
m_codecCtx->sample_rate = codec->supported_samplerates[i];
}
}
}
if(m_codecCtx->sample_rate == 0)
m_codecCtx->sample_rate = m_specs.rate;
m_specs.rate = m_codecCtx->sample_rate;
m_codecCtx->codec_id = m_outputFmt->audio_codec;
m_codecCtx->codec_type = AVMEDIA_TYPE_AUDIO;
m_codecCtx->bit_rate = bitrate;
m_codecCtx->channels = m_specs.channels;
m_stream->time_base.num = m_codecCtx->time_base.num = 1;
m_stream->time_base.den = m_codecCtx->time_base.den = m_codecCtx->sample_rate;
if(avcodec_open2(m_codecCtx, codec, nullptr) < 0)
AUD_THROW(FileException, "File couldn't be written, encoder couldn't be opened with ffmpeg.");
int samplesize = std::max(int(AUD_SAMPLE_SIZE(m_specs)), AUD_DEVICE_SAMPLE_SIZE(m_specs));
if((m_input_size = m_codecCtx->frame_size))
m_input_buffer.resize(m_input_size * samplesize);
if(avio_open(&m_formatCtx->pb, filename.c_str(), AVIO_FLAG_WRITE))
AUD_THROW(FileException, "File couldn't be written, file opening failed with ffmpeg.");
avformat_write_header(m_formatCtx, nullptr);
}
catch(Exception&)
{
avformat_free_context(m_formatCtx);
throw;
}
}
FFMPEGWriter::~FFMPEGWriter()
{
// writte missing data
if(m_input_samples)
encode();
close();
av_write_trailer(m_formatCtx);
avcodec_close(m_codecCtx);
avio_close(m_formatCtx->pb);
avformat_free_context(m_formatCtx);
}
int FFMPEGWriter::getPosition() const
{
return m_position;
}
DeviceSpecs FFMPEGWriter::getSpecs() const
{
return m_specs;
}
void FFMPEGWriter::write(unsigned int length, sample_t* buffer)
{
unsigned int samplesize = AUD_SAMPLE_SIZE(m_specs);
if(m_input_size)
{
sample_t* inbuf = m_input_buffer.getBuffer();
while(length)
{
unsigned int len = std::min(m_input_size - m_input_samples, length);
std::memcpy(inbuf + m_input_samples * m_specs.channels, buffer, len * samplesize);
buffer += len * m_specs.channels;
m_input_samples += len;
m_position += len;
length -= len;
if(m_input_samples == m_input_size)
{
encode();
m_input_samples = 0;
}
}
}
else // PCM data, can write directly!
{
int samplesize = AUD_SAMPLE_SIZE(m_specs);
m_input_buffer.assureSize(length * std::max(AUD_DEVICE_SAMPLE_SIZE(m_specs), samplesize));
sample_t* buf = m_input_buffer.getBuffer();
m_convert(reinterpret_cast<data_t*>(buf), reinterpret_cast<data_t*>(buffer), length * m_specs.channels);
m_input_samples = length;
m_position += length;
encode();
}
}
AUD_NAMESPACE_END