void AudioEncoder::PrepareStream(AVStream* stream, AVCodec* codec, AVDictionary** options, const std::vector<std::pair<QString, QString> >& codec_options,
unsigned int bit_rate, unsigned int channels, unsigned int sample_rate) {
if(channels == 0) {
Logger::LogError("[AudioEncoder::PrepareStream] " + Logger::tr("Error: Channel count is zero."));
throw LibavException();
}
if(sample_rate == 0) {
Logger::LogError("[AudioEncoder::PrepareStream] " + Logger::tr("Error: Sample rate is zero."));
throw LibavException();
}
stream->codec->bit_rate = bit_rate;
stream->codec->channels = channels;
stream->codec->sample_rate = sample_rate;
stream->codec->time_base.num = 1;
stream->codec->time_base.den = sample_rate;
#if SSR_USE_AVSTREAM_TIME_BASE
stream->time_base = stream->codec->time_base;
#endif
stream->codec->thread_count = 1;
// parse options
QString sample_format_name;
for(unsigned int i = 0; i < codec_options.size(); ++i) {
const QString &key = codec_options[i].first, &value = codec_options[i].second;
if(key == "threads") {
stream->codec->thread_count = ParseCodecOptionInt(key, value, 1, 100);
} else if(key == "qscale") {
stream->codec->flags |= CODEC_FLAG_QSCALE;
stream->codec->global_quality = lrint(ParseCodecOptionDouble(key, value, -1.0e6, 1.0e6, FF_QP2LAMBDA));
} else if(key == "sampleformat") {
sample_format_name = value;
} else {
av_dict_set(options, key.toUtf8().constData(), value.toUtf8().constData(), 0);
}
}
// choose the sample format
stream->codec->sample_fmt = AV_SAMPLE_FMT_NONE;
for(unsigned int i = 0; i < SUPPORTED_SAMPLE_FORMATS.size(); ++i) {
if(!sample_format_name.isEmpty() && sample_format_name != SUPPORTED_SAMPLE_FORMATS[i].m_name)
continue;
if(!AVCodecSupportsSampleFormat(codec, SUPPORTED_SAMPLE_FORMATS[i].m_format))
continue;
Logger::LogInfo("[AudioEncoder::PrepareStream] " + Logger::tr("Using sample format %1.").arg(SUPPORTED_SAMPLE_FORMATS[i].m_name));
stream->codec->sample_fmt = SUPPORTED_SAMPLE_FORMATS[i].m_format;
break;
}
if(stream->codec->sample_fmt == AV_SAMPLE_FMT_NONE) {
Logger::LogError("[AudioEncoder::PrepareStream] " + Logger::tr("Error: Encoder requires an unsupported sample format!"));
throw LibavException();
}
}
void VideoEncoder::PrepareStream(AVStream* stream, AVCodec* codec, AVDictionary** options, const std::vector<std::pair<QString, QString> >& codec_options,
unsigned int bit_rate, unsigned int width, unsigned int height, unsigned int frame_rate) {
if(width == 0 || height == 0) {
Logger::LogError("[VideoEncoder::PrepareStream] " + Logger::tr("Error: Width or height is zero!"));
throw LibavException();
}
if(width > 10000 || height > 10000) {
Logger::LogError("[VideoEncoder::PrepareStream] " + Logger::tr("Error: Width or height is too large, the maximum width and height is %1!").arg(10000));
throw LibavException();
}
if(width % 2 != 0 || height % 2 != 0) {
Logger::LogError("[VideoEncoder::PrepareStream] " + Logger::tr("Error: Width or height is not an even number!"));
throw LibavException();
}
if(frame_rate == 0) {
Logger::LogError("[VideoEncoder::PrepareStream] " + Logger::tr("Error: Frame rate is zero!"));
throw LibavException();
}
stream->codec->bit_rate = bit_rate;
stream->codec->width = width;
stream->codec->height = height;
stream->codec->time_base.num = 1;
stream->codec->time_base.den = frame_rate;
#if SSR_USE_AVSTREAM_TIME_BASE
stream->time_base = stream->codec->time_base;
#endif
stream->codec->pix_fmt = AV_PIX_FMT_NONE;
for(unsigned int i = 0; i < SUPPORTED_PIXEL_FORMATS.size(); ++i) {
if(AVCodecSupportsPixelFormat(codec, SUPPORTED_PIXEL_FORMATS[i].m_format)) {
stream->codec->pix_fmt = SUPPORTED_PIXEL_FORMATS[i].m_format;
if(SUPPORTED_PIXEL_FORMATS[i].m_is_yuv) {
stream->codec->color_primaries = AVCOL_PRI_BT709;
stream->codec->color_trc = AVCOL_TRC_BT709;
stream->codec->colorspace = AVCOL_SPC_BT709;
stream->codec->color_range = AVCOL_RANGE_MPEG;
stream->codec->chroma_sample_location = AVCHROMA_LOC_CENTER;
} else {
stream->codec->colorspace = AVCOL_SPC_RGB;
}
break;
}
}
if(stream->codec->pix_fmt == AV_PIX_FMT_NONE) {
Logger::LogError("[VideoEncoder::PrepareStream] " + Logger::tr("Error: Encoder requires an unsupported pixel format!"));
throw LibavException();
}
stream->codec->sample_aspect_ratio.num = 1;
stream->codec->sample_aspect_ratio.den = 1;
stream->sample_aspect_ratio = stream->codec->sample_aspect_ratio;
stream->codec->thread_count = std::max(1, (int) std::thread::hardware_concurrency());
for(unsigned int i = 0; i < codec_options.size(); ++i) {
const QString &key = codec_options[i].first, &value = codec_options[i].second;
if(key == "threads") {
stream->codec->thread_count = ParseCodecOptionInt(key, value, 1, 100);
} else if(key == "qscale") {
stream->codec->flags |= CODEC_FLAG_QSCALE;
stream->codec->global_quality = lrint(ParseCodecOptionDouble(key, value, -1.0e6, 1.0e6, FF_QP2LAMBDA));
} else if(key == "minrate") {
stream->codec->rc_min_rate = ParseCodecOptionInt(key, value, 1, 1000000, 1024); // kbps
} else if(key == "maxrate") {
stream->codec->rc_max_rate = ParseCodecOptionInt(key, value, 1, 1000000, 1024); // kbps
} else if(key == "bufsize") {
stream->codec->rc_buffer_size = ParseCodecOptionInt(key, value, 1, 1000000, 1024); // kbps
} else if(key == "keyint") {
stream->codec->gop_size = ParseCodecOptionInt(key, value, 1, 1000000);
#if !SSR_USE_AVCODEC_PRIVATE_PRESET
} else if(key == "crf") {
stream->codec->crf = ParseCodecOptionInt(key, value, 0, 51);
#endif
#if !SSR_USE_AVCODEC_PRIVATE_PRESET
} else if(key == "preset") {
X264Preset(stream->codec, value.toUtf8().constData());
#endif
} else {
av_dict_set(options, key.toUtf8().constData(), value.toUtf8().constData(), 0);
}
}
}