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Add PCM24 codec [Legend of Mana (PC)]

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bnnm 2021-09-11 15:49:37 +02:00
parent 58b6b16e3a
commit c859482dcd
5 changed files with 39 additions and 15 deletions
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1
src/coding/coding.h
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@ -92,6 +92,7 @@ void decode_ulaw(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing,
void decode_ulaw_int(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
void decode_alaw(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
void decode_pcmfloat(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int big_endian);
void decode_pcm24le(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
int32_t pcm_bytes_to_samples(size_t bytes, int channels, int bits_per_sample);
int32_t pcm16_bytes_to_samples(size_t bytes, int channels);
int32_t pcm8_bytes_to_samples(size_t bytes, int channels);

11
src/coding/pcm_decoder.c
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@ -216,6 +216,17 @@ void decode_pcmfloat(VGMSTREAMCHANNEL * stream, sample_t * outbuf, int channelsp
}
}
void decode_pcm24le(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) {
int i;
int32_t sample_count;
for (i=first_sample,sample_count=0; i<first_sample+samples_to_do; i++,sample_count+=channelspacing) {
off_t offset = stream->offset + i * 0x03;
int v = read_u8(offset+0x00, stream->streamfile) | (read_s16le(offset + 0x01, stream->streamfile) << 8);
outbuf[sample_count] = (v >> 8);
}
}
int32_t pcm_bytes_to_samples(size_t bytes, int channels, int bits_per_sample) {
if (channels <= 0 || bits_per_sample <= 0) return 0;
return ((int64_t)bytes * 8) / channels / bits_per_sample;

10
src/decode.c
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@ -368,6 +368,7 @@ int get_vgmstream_samples_per_frame(VGMSTREAM* vgmstream) {
case coding_ULAW_int:
case coding_ALAW:
case coding_PCMFLOAT:
case coding_PCM24LE:
return 1;
#ifdef VGM_USE_VORBIS
case coding_OGG_VORBIS:
@ -592,6 +593,8 @@ int get_vgmstream_frame_size(VGMSTREAM* vgmstream) {
return 0x01;
case coding_PCMFLOAT:
return 0x04;
case coding_PCM24LE:
return 0x03;
case coding_SDX2:
case coding_SDX2_int:
@ -886,6 +889,13 @@ void decode_vgmstream(VGMSTREAM* vgmstream, int samples_written, int samples_to_
}
break;
case coding_PCM24LE:
for (ch = 0; ch < vgmstream->channels; ch++) {
decode_pcm24le(&vgmstream->ch[ch], buffer+ch,
vgmstream->channels, vgmstream->samples_into_block, samples_to_do);
}
break;
case coding_NDS_IMA:
for (ch = 0; ch < vgmstream->channels; ch++) {
decode_nds_ima(&vgmstream->ch[ch], buffer+ch,

1
src/formats.c
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@ -716,6 +716,7 @@ static const coding_info coding_info_list[] = {
{coding_ULAW_int, "8-bit u-Law with 1 byte interleave (block)"},
{coding_ALAW, "8-bit a-Law"},
{coding_PCMFLOAT, "32-bit float PCM"},
{coding_PCM24LE, "24-bit Little Endian PCM"},
{coding_CRI_ADX, "CRI ADX 4-bit ADPCM"},
{coding_CRI_ADX_fixed, "CRI ADX 4-bit ADPCM (fixed coefficients)"},

3
src/vgmstream.h
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@ -67,7 +67,8 @@ typedef enum {
coding_ULAW_int, /* 8-bit u-Law (non-linear PCM) with sample-level interleave (for blocks) */
coding_ALAW, /* 8-bit a-Law (non-linear PCM) */
coding_PCMFLOAT, /* 32 bit float PCM */
coding_PCMFLOAT, /* 32-bit float PCM */
coding_PCM24LE, /* 24-bit PCM */
/* ADPCM */
coding_CRI_ADX, /* CRI ADX */