mirror of https://github.com/odrling/Aegisub
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
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// Copyright (c) 2007 Fredrik Mellbin
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include "ffmpegsource.h"
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FFAudioBase::FFAudioBase() {
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memset(&VI, 0, sizeof(VI));
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DecodingBuffer = new uint8_t[AVCODEC_MAX_AUDIO_FRAME_SIZE];
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};
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FFAudioBase::~FFAudioBase() {
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delete[] DecodingBuffer;
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};
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size_t FFAudioBase::FindClosestAudioKeyFrame(int64_t Sample) {
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for (size_t i = 0; i < SI.size(); i++) {
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if (SI[i].SampleStart == Sample && SI[i].KeyFrame)
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return i;
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else if (SI[i].SampleStart > Sample && SI[i].KeyFrame)
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return i - 1;
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}
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return SI.size() - 1;
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}
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bool FFAudioBase::LoadSampleInfoFromFile(const char *AAudioCacheFile, const char *ASource, int AAudioTrack) {
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char DefaultCacheFilename[1024];
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sprintf(DefaultCacheFilename, "%s.ffas%dcache", ASource, AAudioTrack);
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if (!strcmp(AAudioCacheFile, ""))
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AAudioCacheFile = DefaultCacheFilename;
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FILE *CacheFile = fopen(AAudioCacheFile, "r");
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if (!CacheFile)
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return false;
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size_t AudioBlocks = 0;
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if (fscanf(CacheFile, "%lld %u\r\n", &VI.num_audio_samples, &AudioBlocks) <= 0 || VI.num_audio_samples <= 0 || AudioBlocks <= 0) {
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VI.num_audio_samples = 0;
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fclose(CacheFile);
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return false;
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}
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for (size_t i = 0; i < AudioBlocks; i++) {
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int64_t SampleStart;
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int64_t FilePos;
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unsigned int FrameSize;
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int Flags;
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fscanf(CacheFile, "%lld %lld %u %d\r\n", &SampleStart, &FilePos, &FrameSize, &Flags);
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SI.push_back(SampleInfo(SampleStart, FilePos, FrameSize, (Flags & 1) != 0));
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}
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fclose(CacheFile);
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return true;
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}
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bool FFAudioBase::SaveSampleInfoToFile(const char *AAudioCacheFile, const char *ASource, int AAudioTrack) {
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char DefaultCacheFilename[1024];
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sprintf(DefaultCacheFilename, "%s.ffas%dcache", ASource, AAudioTrack);
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if (!strcmp(AAudioCacheFile, ""))
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AAudioCacheFile = DefaultCacheFilename;
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FILE *CacheFile = fopen(AAudioCacheFile, "wb");
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if (!CacheFile)
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return false;
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fprintf(CacheFile, "%lld %u\r\n", VI.num_audio_samples, SI.size());
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for (size_t i = 0; i < SI.size(); i++) {
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int Flags = SI[i].KeyFrame ? 1 : 0;
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fprintf(CacheFile, "%lld %lld %u %d\r\n", SI[i].SampleStart, SI[i].FilePos, SI[i].FrameSize, Flags);
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}
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fclose(CacheFile);
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return true;
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}
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