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.caf (Apple Core Audio Format file), as seen on iPhone, using Apple's IMA

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git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@677 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
halleyscometsw 2009-08-30 02:16:54 +00:00
parent 8101ace4ed
commit 81d4cbf919
12 changed files with 240 additions and 2 deletions
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1
readme.txt
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@ -217,6 +217,7 @@ etc:
- .afc (GC AFC ADPCM)
- .ahx (MPEG-2 Layer II)
- .aix (CRI ADX ADPCM)
- .caf (Apple IMA4 ADPCM)
- .bgw (FFXI PS-like ADPCM)
- .de2 (MS ADPCM)
- .kcey (EACS IMA ADPCM)

3
src/Makefile
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@ -203,7 +203,8 @@ META_OBJS=meta/adx_header.o \
meta/ps2_vgv.o \
meta/ngc_gcub.o \
meta/maxis_xa.o \
meta/ngc_sck_dsp.o
meta/ngc_sck_dsp.o \
meta/apple_caff.o
OBJECTS=vgmstream.o streamfile.o util.o $(CODING_OBJS) $(LAYOUT_OBJS) $(META_OBJS)

3
src/coding/coding.h
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@ -21,6 +21,9 @@ void decode_ima(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing,
void decode_ms_ima(VGMSTREAM * vgmstream,VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do,int channel);
void decode_apple_ima4(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
void decode_ms_ima(VGMSTREAM * vgmstream,VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do,int channel);
void decode_ngc_afc(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
void decode_ngc_dsp(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);

50
src/coding/ima_decoder.c
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@ -394,3 +394,53 @@ void decode_ima(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing,
stream->adpcm_history1_32=hist1;
stream->adpcm_step_index=step_index;
}
void decode_apple_ima4(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) {
int i;
int32_t sample_count=0;
int16_t hist1=stream->adpcm_history1_16;
int step_index = stream->adpcm_step_index;
off_t packet_offset = stream->offset + first_sample/64*34;
first_sample = first_sample % 64;
if (first_sample == 0)
{
hist1 = (int16_t)((uint16_t)read_16bitBE(packet_offset,stream->streamfile) & 0xff80);
step_index = read_8bit(packet_offset+1,stream->streamfile) & 0x7f;
}
for (i=first_sample,sample_count=0; i<first_sample+samples_to_do; i++,sample_count+=channelspacing) {
int step = ADPCMTable[step_index];
uint8_t sample_byte;
int sample_nibble;
int sample_decoded;
int delta;
sample_byte = read_8bit(packet_offset+2+i/2,stream->streamfile);
sample_nibble = (sample_byte >> (i&1?4:0))&0xf;
sample_decoded = hist1;
delta = step >> 3;
if (sample_nibble & 1) delta += step >> 2;
if (sample_nibble & 2) delta += step >> 1;
if (sample_nibble & 4) delta += step;
if (sample_nibble & 8)
sample_decoded -= delta;
else
sample_decoded += delta;
hist1=clamp16(sample_decoded);
step_index += IMA_IndexTable[sample_nibble&0x7];
if (step_index < 0) step_index=0;
if (step_index > 88) step_index=88;
outbuf[sample_count]=(short)(hist1);
}
stream->adpcm_history1_16=hist1;
stream->adpcm_step_index=step_index;
}

4
src/libvgmstream.vcproj
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@ -236,6 +236,10 @@
RelativePath=".\meta\aix.c"
>
</File>
<File
RelativePath=".\meta\apple_caff.c"
>
</File>
<File
RelativePath=".\meta\ast.c"
>

1
src/meta/Makefile.unix.am
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@ -163,5 +163,6 @@ libmeta_la_SOURCES += ps2_vgv.c
libmeta_la_SOURCES += ngc_gcub.c
libmeta_la_SOURCES += maxis_xa.c
libmeta_la_SOURCES += ngc_sck_dsp.c
libmeta_la_SOURCES += apple_caff.c
EXTRA_DIST = meta.h

154
src/meta/apple_caff.c Normal file
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@ -0,0 +1,154 @@
#include "meta.h"
#include "../util.h"
/* Apple Core Audio Format */
VGMSTREAM * init_vgmstream_apple_caff(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
off_t start_offset;
off_t data_size;
off_t sample_count;
off_t interleave;
int sample_rate,unused_frames;
int channel_count;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("caf",filename_extension(filename))) goto fail;
/* check "caff" id */
if (read_32bitBE(0,streamFile)!=0x63616666) goto fail;
/* check version, flags */
if (read_32bitBE(4,streamFile)!=0x00010000) goto fail;
off_t chunk_offset = 8;
off_t file_length = (off_t)get_streamfile_size(streamFile);
int found_desc = 0, found_pakt = 0, found_data = 0;
while (chunk_offset < file_length)
{
/* high half of size (expect 0s) */
if (read_32bitBE(chunk_offset+4,streamFile) != 0) goto fail;
/* handle chunk type */
switch (read_32bitBE(chunk_offset,streamFile))
{
case 0x64657363: /* desc */
found_desc = 1;
{
/* rather than put a convoluted conversion here for
portability, just look it up */
uint32_t sratefloat = read_32bitBE(chunk_offset+0x0c, streamFile);
if (read_32bitBE(chunk_offset+0x10, streamFile) != 0) goto fail;
switch (sratefloat)
{
case 0x40E58880:
sample_rate = 44100;
break;
default:
goto fail;
}
}
{
uint32_t codec_4cc = read_32bitBE(chunk_offset+0x14, streamFile);
/* only supporting ima4 for now */
if (codec_4cc != 0x696d6134) goto fail;
/* format flags */
if (read_32bitBE(chunk_offset+0x18, streamFile) != 0) goto fail;
uint32_t bytes_per_packet = read_32bitBE(chunk_offset+0x1c, streamFile);
uint32_t frames_per_packet = read_32bitBE(chunk_offset+0x20, streamFile);
uint32_t channels_per_frame = read_32bitBE(chunk_offset+0x24, streamFile);
uint32_t bits_per_channel = read_32bitBE(chunk_offset+0x28, streamFile);
interleave = bytes_per_packet / channels_per_frame;
channel_count = channels_per_frame;
if (channels_per_frame != 1 && channels_per_frame != 2)
goto fail;
/* ima4-specific */
if (frames_per_packet != 64) goto fail;
if ((frames_per_packet / 2 + 2) * channels_per_frame !=
bytes_per_packet) goto fail;
if (bits_per_channel != 0) goto fail;
}
break;
case 0x70616b74: /* pakt */
found_pakt = 1;
/* 64-bit packet table size, 0 for constant bitrate */
if (
read_32bitBE(chunk_offset+0x0c,streamFile) != 0 ||
read_32bitBE(chunk_offset+0x10,streamFile) != 0) goto fail;
/* high half of valid frames count */
if (read_32bitBE(chunk_offset+0x14,streamFile) != 0) goto fail;
/* frame count */
sample_count = read_32bitBE(chunk_offset+0x18,streamFile);
/* priming frames */
if (read_32bitBE(chunk_offset+0x1c,streamFile) != 0) goto fail;
/* remainder (unused) frames */
unused_frames = read_32bitBE(chunk_offset+0x20,streamFile);
break;
case 0x66726565: /* free */
/* padding, ignore */
break;
case 0x64617461: /* data */
if (read_32bitBE(chunk_offset+12,streamFile) != 1) goto fail;
found_data = 1;
start_offset = chunk_offset + 16;
data_size = read_32bitBE(chunk_offset+8,streamFile) - 4;
break;
default:
goto fail;
}
/* done with chunk */
chunk_offset += 12 + read_32bitBE(chunk_offset+8,streamFile);
}
if (!found_pakt || !found_desc || !found_data) goto fail;
/* ima4-specific */
/* check for full packets */
if (data_size % (interleave*channel_count) != 0) goto fail;
if ((sample_count+unused_frames)%((interleave-2)*2) != 0) goto fail;
/* check that all packets are accounted for */
if (data_size/interleave/channel_count !=
(sample_count+unused_frames)/((interleave-2)*2)) goto fail;
vgmstream = allocate_vgmstream(channel_count,0);
if (!vgmstream) goto fail;
vgmstream->channels = channel_count;
vgmstream->sample_rate = sample_rate;
vgmstream->num_samples = sample_count;
/* ima4-specific */
vgmstream->coding_type = coding_APPLE_IMA4;
if (channel_count == 2)
vgmstream->layout_type = layout_interleave;
else
vgmstream->layout_type = layout_none;
vgmstream->interleave_block_size = interleave;
vgmstream->meta_type = meta_CAFF;
/* open the file for reading by each channel */
{
int i;
for (i=0;i<channel_count;i++)
{
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (!vgmstream->ch[i].streamfile) goto fail;
vgmstream->ch[i].offset =
vgmstream->ch[i].channel_start_offset =
start_offset + interleave * i;
}
}
return vgmstream;
fail:
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}

2
src/meta/meta.h
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@ -405,4 +405,6 @@ VGMSTREAM * init_vgmstream_maxis_xa(STREAMFILE * streamFile);
VGMSTREAM * init_vgmstream_ngc_sck_dsp(STREAMFILE * streamFile);
VGMSTREAM * init_vgmstream_apple_caff(STREAMFILE * streamFile);
#endif

18
src/vgmstream.c
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@ -222,6 +222,7 @@ VGMSTREAM * (*init_vgmstream_fcns[])(STREAMFILE *streamFile) = {
init_vgmstream_ngc_gcub,
init_vgmstream_maxis_xa,
init_vgmstream_ngc_sck_dsp,
init_vgmstream_apple_caff,
};
#define INIT_VGMSTREAM_FCNS (sizeof(init_vgmstream_fcns)/sizeof(init_vgmstream_fcns[0]))
@ -715,6 +716,8 @@ int get_vgmstream_samples_per_frame(VGMSTREAM * vgmstream) {
return vgmstream->ws_output_size;
case coding_MSADPCM:
return (vgmstream->interleave_block_size-(7-1)*vgmstream->channels)*2/vgmstream->channels;
case coding_APPLE_IMA4:
return 64;
case coding_MS_IMA:
return (vgmstream->interleave_block_size-4*vgmstream->channels)*2/vgmstream->channels;
case coding_NDS_PROCYON:
@ -793,6 +796,8 @@ int get_vgmstream_frame_size(VGMSTREAM * vgmstream) {
case coding_INT_DVI_IMA:
case coding_AICA:
return 1;
case coding_APPLE_IMA4:
return 34;
case coding_MSADPCM:
return vgmstream->interleave_block_size;
default:
@ -1048,6 +1053,13 @@ void decode_vgmstream(VGMSTREAM * vgmstream, int samples_written, int samples_to
samples_to_do);
}
break;
case coding_APPLE_IMA4:
for (chan=0;chan<vgmstream->channels;chan++) {
decode_apple_ima4(&vgmstream->ch[chan],buffer+samples_written*vgmstream->channels+chan,
vgmstream->channels,vgmstream->samples_into_block,
samples_to_do);
}
break;
case coding_WS:
for (chan=0;chan<vgmstream->channels;chan++) {
decode_ws(vgmstream,chan,buffer+samples_written*vgmstream->channels+chan,
@ -1389,6 +1401,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
case coding_MS_IMA:
snprintf(temp,TEMPSIZE,"Microsoft 4-bit IMA ADPCM");
break;
case coding_APPLE_IMA4:
snprintf(temp,TEMPSIZE,"Apple Quicktime 4-bit IMA ADPCM");
break;
case coding_WS:
snprintf(temp,TEMPSIZE,"Westwood Studios DPCM");
break;
@ -2234,6 +2249,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
case meta_NGC_SWD:
snprintf(temp,TEMPSIZE,"PSF + Standard DSP Headers");
break;
case meta_CAFF:
snprintf(temp,TEMPSIZE,"Apple Core Audio Format Header");
break;
default:
snprintf(temp,TEMPSIZE,"THEY SHOULD HAVE SENT A POET");
}

2
src/vgmstream.h
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@ -73,6 +73,7 @@ typedef enum {
coding_IMA, /* bare IMA, low nibble first */
coding_INT_IMA, /* */
coding_MS_IMA, /* Microsoft IMA */
coding_APPLE_IMA4, /* Apple Quicktime IMA4 */
coding_WS, /* Westwood Studios' custom VBR ADPCM */
#ifdef VGM_USE_MPEG
coding_fake_MPEG2_L2, /* MPEG-2 Layer 2 (AHX), with lying headers */
@ -404,6 +405,7 @@ typedef enum {
meta_NGC_GCUB, /* Sega Soccer Slam */
meta_MAXIS_XA, /* Sim City 3000 (PC) */
meta_NGC_SCK_DSP, /* Scorpion King (NGC) */
meta_CAFF, /* iPhone .caf */
} meta_t;
typedef struct {

1
unix/data.c
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@ -182,6 +182,7 @@ gchar *vgmstream_exts [] = {
"2dx",
"adpcm",
"hwas",
"caf",
/* terminator */
NULL
};

1
winamp/in_vgmstream.c
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@ -110,6 +110,7 @@ char * extension_list[] = {
"bmdx\0BMDX Audio File (*.BMDX)\0",
"brstm;brstmspm\0BRSTM Audio File (*.BRSTM)\0",
"caf\0CAF Audio File (*.CAF)\0",
"ccc\0CCC Audio File (*.CCC)\0",
"cfn\0CFN Audio File (*.CFN)\0",
"cnk\0CNK Audio File (*.CNK)\0",