264 lines
7.7 KiB
C++
264 lines
7.7 KiB
C++
/*
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* QCMA: Cross-platform content manager assistant for the PS Vita
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*
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* Copyright (C) 2013 Codestation
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "avdecoder.h"
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#include <QBuffer>
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#include <QFile>
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#include <QSettings>
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AVDecoder::AvInit init;
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AVDecoder::AVDecoder() :
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pFormatCtx(NULL)
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{
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}
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AVDecoder::~AVDecoder()
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{
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if(pFormatCtx) {
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avformat_close_input(&pFormatCtx);
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}
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}
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bool AVDecoder::open(const QString filename)
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{
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if(avformat_open_input(&pFormatCtx, QFile::encodeName(filename).constData(), NULL, NULL) != 0) {
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return false;
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}
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if(avformat_find_stream_info(pFormatCtx, NULL) < 0) {
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avformat_close_input(&pFormatCtx);
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return false;
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}
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return true;
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}
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void AVDecoder::getAudioMetadata(metadata_t &metadata)
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{
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AVDictionaryEntry *entry;
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AVDictionary* file_metadata = pFormatCtx->metadata;
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if((entry = av_dict_get(file_metadata, "artist", NULL, 0)) != NULL) {
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metadata.data.music.artist = strdup(entry->value);
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} else {
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metadata.data.music.artist = strdup("");
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}
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if((entry = av_dict_get(file_metadata, "album", NULL, 0)) != NULL) {
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metadata.data.music.album = strdup(entry->value);
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} else {
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metadata.data.music.album = strdup("");
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}
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if((entry = av_dict_get(file_metadata, "title", NULL, 0)) != NULL) {
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metadata.data.music.title = strdup(entry->value);
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} else {
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metadata.data.music.title = strdup("");
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}
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metadata.data.music.tracks->data.track_audio.bitrate = pFormatCtx->bit_rate;
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}
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void AVDecoder::getVideoMetadata(metadata_t &metadata)
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{
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AVDictionaryEntry *entry;
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AVDictionary* file_metadata = pFormatCtx->metadata;
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if((entry = av_dict_get(file_metadata, "copyright", NULL, 0)) != NULL) {
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metadata.data.video.copyright = strdup(entry->value);
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} else {
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metadata.data.video.copyright = strdup("");
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}
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if((entry = av_dict_get(file_metadata, "comments", NULL, 0)) != NULL) {
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metadata.data.video.explanation = strdup(entry->value);
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} else {
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metadata.data.video.explanation = strdup("");
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}
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if((entry = av_dict_get(file_metadata, "title", NULL, 0)) != NULL) {
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metadata.data.video.title = strdup(entry->value);
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} else {
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metadata.data.video.title = strdup(metadata.name);
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}
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metadata.data.video.tracks->data.track_video.duration = pFormatCtx->duration / 1000;
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metadata.data.video.tracks->data.track_video.bitrate = pFormatCtx->bit_rate;
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int stream_index;
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AVCodec *codec = NULL;
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if((stream_index = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &codec, 0)) >= 0) {
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AVCodecContext *pCodecCtx = pFormatCtx->streams[stream_index]->codec;
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metadata.data.video.tracks->data.track_video.width = pCodecCtx->width;
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metadata.data.video.tracks->data.track_video.height = pCodecCtx->height;
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}
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}
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void AVDecoder::getPictureMetadata(metadata_t &metadata)
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{
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int stream_index;
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AVCodec *codec = NULL;
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if((stream_index = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &codec, 0)) >= 0) {
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AVCodecContext *pCodecCtx = pFormatCtx->streams[stream_index]->codec;
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metadata.data.photo.tracks->data.track_photo.width = pCodecCtx->width;
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metadata.data.photo.tracks->data.track_photo.height = pCodecCtx->height;
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}
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metadata.data.photo.title = strdup(metadata.name);
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}
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QByteArray AVDecoder::getAudioThumbnail(int width, int height)
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{
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QByteArray data;
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for (uint i = 0; i < pFormatCtx->nb_streams; i++) {
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if(pFormatCtx->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC) {
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AVPacket pkt = pFormatCtx->streams[i]->attached_pic;
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QBuffer imgbuffer(&data);
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imgbuffer.open(QIODevice::WriteOnly);
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QImage img = QImage::fromData(QByteArray((const char *)pkt.data, pkt.size));
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QImage result = img.scaled(width, height, Qt::KeepAspectRatio, Qt::SmoothTransformation);
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result.save(&imgbuffer, "JPEG");
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break;
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}
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}
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return data;
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}
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AVFrame *AVDecoder::getDecodedFrame(AVCodecContext *pCodecCtx, int stream_index)
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{
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AVFrame *pFrame = avcodec_alloc_frame();
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AVPacket packet;
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int frame_finished = 0;
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while(!frame_finished && av_read_frame(pFormatCtx, &packet)>=0) {
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if(packet.stream_index == stream_index) {
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avcodec_decode_video2(pCodecCtx, pFrame, &frame_finished, &packet);
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}
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av_free_packet(&packet);
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}
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if(frame_finished) {
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return pFrame;
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} else {
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av_free(pFrame);
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return NULL;
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}
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}
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QByteArray AVDecoder::getVideoThumbnail(int width, int height)
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{
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QByteArray data;
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int stream_index;
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AVFrame *pFrame;
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AVDictionary *opts = NULL;
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AVCodec *codec = NULL;
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AVCodecContext *pCodecCtx = NULL;
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int percentage = QSettings().value("videoThumbnailSeekPercentage", 30).toInt();
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if((stream_index = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &codec, 0)) < 0) {
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return data;
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}
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pCodecCtx = pFormatCtx->streams[stream_index]->codec;
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if(avcodec_open2(pCodecCtx, codec, &opts) < 0) {
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avcodec_close(pCodecCtx);
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return data;
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}
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qint64 seek_pos = pFormatCtx->duration * percentage / (AV_TIME_BASE * 100);
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qint64 frame = av_rescale(seek_pos,pFormatCtx->streams[stream_index]->time_base.den, pFormatCtx->streams[stream_index]->time_base.num);
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if(avformat_seek_file(pFormatCtx, stream_index, 0, frame, frame, AVSEEK_FLAG_FRAME) < 0) {
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avcodec_close(pCodecCtx);
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return data;
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}
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if((pFrame = getDecodedFrame(pCodecCtx, stream_index)) == NULL) {
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avcodec_close(pCodecCtx);
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return data;
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}
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AVFrame *pFrameRGB = avcodec_alloc_frame();
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int numBytes = avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height);
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uint8_t *buffer = (uint8_t *)av_malloc(numBytes);
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avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height);
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SwsContext *sws_ctx = sws_getContext(
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pCodecCtx->width,
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pCodecCtx->height,
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pCodecCtx->pix_fmt,
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pCodecCtx->width,
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pCodecCtx->height,
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PIX_FMT_RGB24,
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SWS_BICUBIC,
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NULL,
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NULL,
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NULL
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);
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if(!sws_ctx) {
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avcodec_close(pCodecCtx);
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return data;
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}
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sws_scale(
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sws_ctx,
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pFrame->data,
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pFrame->linesize,
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0,
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pCodecCtx->height,
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pFrameRGB->data,
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pFrameRGB->linesize
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);
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QImage image(pCodecCtx->width, pCodecCtx->height, QImage::Format_RGB888);
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for(int y = 0, height = pCodecCtx->height, width = pCodecCtx->width; y < height; y++){
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memcpy(image.scanLine(y), pFrameRGB->data[0] + y * pFrameRGB->linesize[0], width * 3);
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}
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QBuffer imgbuffer(&data);
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imgbuffer.open(QIODevice::WriteOnly);
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QImage result = image.scaled(width, height, Qt::KeepAspectRatio, Qt::SmoothTransformation);
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result.save(&imgbuffer, "JPEG");
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av_free(buffer);
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av_free(pFrameRGB);
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av_free(pFrame);
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avcodec_close(pCodecCtx);
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return data;
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}
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void AVDecoder::close()
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{
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avformat_close_input(&pFormatCtx);
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pFormatCtx = NULL;
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}
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