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package com.google.android.exoplayer2.audio;
import com.google.android.exoplayer2.util.MimeTypes;
public final class MpegAudioUtil {
/* access modifiers changed from: private */
public static final int[] BITRATE_V1_L1 = {32000, 64000, 96000, 128000, 160000, DtsUtil.DTS_MAX_RATE_BYTES_PER_SECOND, 224000, AacUtil.AAC_XHE_MAX_RATE_BYTES_PER_SECOND, 288000, 320000, 352000, 384000, 416000, 448000};
/* access modifiers changed from: private */
public static final int[] BITRATE_V1_L2 = {32000, OpusUtil.SAMPLE_RATE, 56000, 64000, Ac3Util.AC3_MAX_RATE_BYTES_PER_SECOND, 96000, 112000, 128000, 160000, DtsUtil.DTS_MAX_RATE_BYTES_PER_SECOND, 224000, AacUtil.AAC_XHE_MAX_RATE_BYTES_PER_SECOND, 320000, 384000};
/* access modifiers changed from: private */
public static final int[] BITRATE_V1_L3 = {32000, MAX_RATE_BYTES_PER_SECOND, OpusUtil.SAMPLE_RATE, 56000, 64000, Ac3Util.AC3_MAX_RATE_BYTES_PER_SECOND, 96000, 112000, 128000, 160000, DtsUtil.DTS_MAX_RATE_BYTES_PER_SECOND, 224000, AacUtil.AAC_XHE_MAX_RATE_BYTES_PER_SECOND, 320000};
/* access modifiers changed from: private */
public static final int[] BITRATE_V2 = {8000, AacUtil.AAC_HE_V1_MAX_RATE_BYTES_PER_SECOND, 24000, 32000, MAX_RATE_BYTES_PER_SECOND, OpusUtil.SAMPLE_RATE, 56000, 64000, Ac3Util.AC3_MAX_RATE_BYTES_PER_SECOND, 96000, 112000, 128000, 144000, 160000};
/* access modifiers changed from: private */
public static final int[] BITRATE_V2_L1 = {32000, OpusUtil.SAMPLE_RATE, 56000, 64000, Ac3Util.AC3_MAX_RATE_BYTES_PER_SECOND, 96000, 112000, 128000, 144000, 160000, 176000, DtsUtil.DTS_MAX_RATE_BYTES_PER_SECOND, 224000, AacUtil.AAC_XHE_MAX_RATE_BYTES_PER_SECOND};
public static final int MAX_FRAME_SIZE_BYTES = 4096;
public static final int MAX_RATE_BYTES_PER_SECOND = 40000;
/* access modifiers changed from: private */
public static final String[] MIME_TYPE_BY_LAYER = {MimeTypes.AUDIO_MPEG_L1, MimeTypes.AUDIO_MPEG_L2, MimeTypes.AUDIO_MPEG};
private static final int SAMPLES_PER_FRAME_L1 = 384;
private static final int SAMPLES_PER_FRAME_L2 = 1152;
private static final int SAMPLES_PER_FRAME_L3_V1 = 1152;
private static final int SAMPLES_PER_FRAME_L3_V2 = 576;
/* access modifiers changed from: private */
public static final int[] SAMPLING_RATE_V1 = {44100, OpusUtil.SAMPLE_RATE, 32000};
/* access modifiers changed from: private */
public static boolean isMagicPresent(int i) {
return (i & -2097152) == -2097152;
}
public static final class Header {
public int bitrate;
public int channels;
public int frameSize;
public String mimeType;
public int sampleRate;
public int samplesPerFrame;
public int version;
public boolean setForHeaderData(int i) {
int i2;
int i3;
int i4;
int i5;
if (!MpegAudioUtil.isMagicPresent(i) || (i2 = (i >>> 19) & 3) == 1 || (i3 = (i >>> 17) & 3) == 0 || (i4 = (i >>> 12) & 15) == 0 || i4 == 15 || (i5 = (i >>> 10) & 3) == 3) {
return false;
}
this.version = i2;
this.mimeType = MpegAudioUtil.MIME_TYPE_BY_LAYER[3 - i3];
int i6 = MpegAudioUtil.SAMPLING_RATE_V1[i5];
this.sampleRate = i6;
int i7 = 2;
if (i2 == 2) {
this.sampleRate = i6 / 2;
} else if (i2 == 0) {
this.sampleRate = i6 / 4;
}
int i8 = (i >>> 9) & 1;
this.samplesPerFrame = MpegAudioUtil.getFrameSizeInSamples(i2, i3);
if (i3 == 3) {
int i9 = i2 == 3 ? MpegAudioUtil.BITRATE_V1_L1[i4 - 1] : MpegAudioUtil.BITRATE_V2_L1[i4 - 1];
this.bitrate = i9;
this.frameSize = (((i9 * 12) / this.sampleRate) + i8) * 4;
} else {
int i10 = 144;
if (i2 == 3) {
int i11 = i3 == 2 ? MpegAudioUtil.BITRATE_V1_L2[i4 - 1] : MpegAudioUtil.BITRATE_V1_L3[i4 - 1];
this.bitrate = i11;
this.frameSize = ((i11 * 144) / this.sampleRate) + i8;
} else {
int i12 = MpegAudioUtil.BITRATE_V2[i4 - 1];
this.bitrate = i12;
if (i3 == 1) {
i10 = 72;
}
this.frameSize = ((i10 * i12) / this.sampleRate) + i8;
}
}
if (((i >> 6) & 3) == 3) {
i7 = 1;
}
this.channels = i7;
return true;
}
}
public static int getFrameSize(int i) {
int i2;
int i3;
int i4;
int i5;
int i6;
if (!isMagicPresent(i) || (i2 = (i >>> 19) & 3) == 1 || (i3 = (i >>> 17) & 3) == 0 || (i4 = (i >>> 12) & 15) == 0 || i4 == 15 || (i5 = (i >>> 10) & 3) == 3) {
return -1;
}
int i7 = SAMPLING_RATE_V1[i5];
if (i2 == 2) {
i7 /= 2;
} else if (i2 == 0) {
i7 /= 4;
}
int i8 = (i >>> 9) & 1;
if (i3 == 3) {
return ((((i2 == 3 ? BITRATE_V1_L1[i4 - 1] : BITRATE_V2_L1[i4 - 1]) * 12) / i7) + i8) * 4;
}
if (i2 == 3) {
i6 = i3 == 2 ? BITRATE_V1_L2[i4 - 1] : BITRATE_V1_L3[i4 - 1];
} else {
i6 = BITRATE_V2[i4 - 1];
}
int i9 = 144;
if (i2 == 3) {
return ((i6 * 144) / i7) + i8;
}
if (i3 == 1) {
i9 = 72;
}
return ((i9 * i6) / i7) + i8;
}
public static int parseMpegAudioFrameSampleCount(int i) {
int i2;
int i3;
if (!isMagicPresent(i) || (i2 = (i >>> 19) & 3) == 1 || (i3 = (i >>> 17) & 3) == 0) {
return -1;
}
int i4 = (i >>> 12) & 15;
int i5 = (i >>> 10) & 3;
if (i4 == 0 || i4 == 15 || i5 == 3) {
return -1;
}
return getFrameSizeInSamples(i2, i3);
}
private MpegAudioUtil() {
}
/* access modifiers changed from: private */
public static int getFrameSizeInSamples(int i, int i2) {
if (i2 != 1) {
if (i2 == 2) {
return 1152;
}
if (i2 == 3) {
return 384;
}
throw new IllegalArgumentException();
} else if (i == 3) {
return 1152;
} else {
return SAMPLES_PER_FRAME_L3_V2;
}
}
}
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