rattatwinko
1a00e98661
--- more thorough commit message which was generated by the wonderful copilot AI tool: Refactor and enhance audio encoding and decoding pipelines - Introduced CodecUtils.h for utility functions related to audio codec selection, including sample format and bitrate clamping. - Added DecoderPipeline.h to manage audio decoding, including opening files and retrieving audio stream information. - Implemented EncoderPipeline.h to handle audio encoding, including encoder setup, resampling, and writing output files. - Created OutputPathBuilder.h to generate output file paths based on reencode job specifications. - Refactored SpectrogramWidget to improve OpenGL handling and ensure safe context usage. - Updated ReencodeDialog.h to enhance code readability and maintainability. - Improved error handling and logging throughout the audio processing components.
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
#pragma once
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#include "FfmpegGuards.h"
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#include <QString>
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extern "C" {
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#include <libavformat/avformat.h>
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#include <libavcodec/avcodec.h>
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}
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namespace engine {
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struct DecoderPipeline
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{
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FmtCtxIn fmtCtx; // owns AVFormatContext*
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CodecCtxGuard ctx; // owns AVCodecContext*
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AVStream *stream = nullptr; // non-owning; lifetime == fmtCtx
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// open filelPath find audiostream and open decoder for it, returns false and sets errorout on any failure
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bool open(const QString &filePath, QString *errorOut)
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{
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AVDictionary *opts = nullptr;
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av_dict_set(&opts, "probesize", "5000000", 0);
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av_dict_set(&opts, "analyzeduration", "5000000", 0);
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int err = avformat_open_input(&fmtCtx.p,
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filePath.toUtf8().constData(),
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nullptr, &opts);
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av_dict_free(&opts);
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if (err < 0) {
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if (errorOut) *errorOut = "Cannot open input file";
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return false;
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}
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if (avformat_find_stream_info(fmtCtx.p, nullptr) < 0) {
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if (errorOut) *errorOut = "Cannot read stream info";
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return false;
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}
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const int audioIdx = av_find_best_stream(
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fmtCtx.p, AVMEDIA_TYPE_AUDIO, -1, -1, nullptr, 0);
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if (audioIdx < 0) {
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if (errorOut) *errorOut = "No audio stream found";
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return false;
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}
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stream = fmtCtx.p->streams[audioIdx];
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const AVCodec *decoder =
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avcodec_find_decoder(stream->codecpar->codec_id);
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if (!decoder) {
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if (errorOut) *errorOut = "No decoder for input codec";
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return false;
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}
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ctx.p = avcodec_alloc_context3(decoder);
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if (!ctx.p) {
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if (errorOut) *errorOut = "OOM: decoder context";
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return false;
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}
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avcodec_parameters_to_context(ctx.p, stream->codecpar);
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ctx.p->pkt_timebase = stream->time_base;
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if (avcodec_open2(ctx.p, decoder, nullptr) < 0) {
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if (errorOut) *errorOut = "Cannot open decoder";
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return false;
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}
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return true;
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}
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// accessors after successful open()
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int audioStreamIndex() const
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{
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return stream ? static_cast<int>(stream - fmtCtx.p->streams[0]) : -1;
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}
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int channels() const { return ctx.p ? ctx.p->ch_layout.nb_channels : 0; }
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int sampleRate() const { return ctx.p ? ctx.p->sample_rate : 0; }
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};
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} // namespace engine
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