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-rw-r--r--adpcm.c140
-rw-r--r--adpcm.h29
-rw-r--r--codec-cfg.c4
-rw-r--r--codec-cfg.h4
-rw-r--r--dec_audio.c34
-rw-r--r--etc/codecs.conf29
6 files changed, 187 insertions, 53 deletions
diff --git a/adpcm.c b/adpcm.c
index f178cf667b..933fb5c4ef 100644
--- a/adpcm.c
+++ b/adpcm.c
@@ -1,6 +1,11 @@
/*
Unified ADPCM Decoder for MPlayer
+ This file is in charge of decoding all of the various ADPCM data
+ formats that various entities have created. Details about the data
+ formats can be found here:
+ http://www.pcisys.net/~melanson/codecs/
+
(C) 2001 Mike Melanson
*/
@@ -13,13 +18,60 @@
#define LE_16(x) (le2me_16(*(unsigned short *)(x)))
#define LE_32(x) (le2me_32(*(unsigned int *)(x)))
+// pertinent tables
+static int adpcm_step[89] =
+{
+ 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
+ 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
+ 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
+ 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
+ 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
+ 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
+ 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
+ 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
+ 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
+};
+
+static int adpcm_index[16] =
+{
+ -1, -1, -1, -1, 2, 4, 6, 8,
+ -1, -1, -1, -1, 2, 4, 6, 8
+};
+
+static int format_0x62_table[16] =
+{
+ 1, 3, 5, 7, 9, 11, 13, 15,
+ -1, -3, -5, -7, -9, -11, -13, -15
+};
+
+static int ms_adapt_table[] =
+{
+ 230, 230, 230, 230, 307, 409, 512, 614,
+ 768, 614, 512, 409, 307, 230, 230, 230
+};
+
+static int ms_adapt_coeff1[] =
+{
+ 256, 512, 0, 192, 240, 460, 392
+};
+
+static int ms_adapt_coeff2[] =
+{
+ 0, -256, 0, 64, 0, -208, -232
+};
+
+// useful macros
// clamp a number between 0 and 88
#define CLAMP_0_TO_88(x) if (x < 0) x = 0; else if (x > 88) x = 88;
// clamp a number within a signed 16-bit range
#define CLAMP_S16(x) if (x < -32768) x = -32768; \
else if (x > 32767) x = 32767;
+// clamp a number above 16
+#define CLAMP_ABOVE_16(x) if (x < 16) x = 16;
// sign extend a 16-bit value
#define SE_16BIT(x) if (x & 0x8000) x -= 0x10000;
+// sign extend a 4-bit value
+#define SE_4BIT(x) if (x & 0x8) x -= 0x10;
void ima_dvi_decode_nibbles(unsigned short *output, int channels,
int predictor_l, int index_l,
@@ -129,3 +181,91 @@ int ima_adpcm_decode_block(unsigned short *output, unsigned char *input,
return IMA_ADPCM_SAMPLES_PER_BLOCK * channels;
}
+
+int ms_adpcm_decode_block(unsigned short *output, unsigned char *input,
+ int channels)
+{
+ int current_channel = 0;
+ int idelta[2];
+ int sample1[2];
+ int sample2[2];
+ int coeff1[2];
+ int coeff2[2];
+ int stream_ptr = 0;
+ int out_ptr = 0;
+ int upper_nibble = 1;
+ int nibble;
+ int snibble; // signed nibble
+ int predictor;
+
+ // fetch the header information, in stereo if both channels are present
+ coeff1[0] = ms_adapt_coeff1[input[stream_ptr]];
+ coeff2[0] = ms_adapt_coeff2[input[stream_ptr]];
+ stream_ptr++;
+ if (channels == 2)
+ {
+ coeff1[1] = ms_adapt_coeff1[input[stream_ptr]];
+ coeff2[1] = ms_adapt_coeff2[input[stream_ptr]];
+ stream_ptr++;
+ }
+
+ idelta[0] = LE_16(&input[stream_ptr]);
+ stream_ptr += 2;
+ SE_16BIT(idelta[0]);
+ if (channels == 2)
+ {
+ idelta[1] = LE_16(&input[stream_ptr]);
+ stream_ptr += 2;
+ SE_16BIT(idelta[1]);
+ }
+
+ sample1[0] = LE_16(&input[stream_ptr]);
+ stream_ptr += 2;
+ SE_16BIT(sample1[0]);
+ if (channels == 2)
+ {
+ sample1[1] = LE_16(&input[stream_ptr]);
+ stream_ptr += 2;
+ SE_16BIT(sample1[1]);
+ }
+
+ sample2[0] = LE_16(&input[stream_ptr]);
+ stream_ptr += 2;
+ SE_16BIT(sample2[0]);
+ if (channels == 2)
+ {
+ sample2[1] = LE_16(&input[stream_ptr]);
+ stream_ptr += 2;
+ SE_16BIT(sample2[1]);
+ }
+
+ while (stream_ptr < MS_ADPCM_BLOCK_SIZE * channels)
+ {
+ // get the next nibble
+ if (upper_nibble)
+ nibble = snibble = input[stream_ptr] >> 4;
+ else
+ nibble = snibble = input[stream_ptr++] & 0x0F;
+ upper_nibble ^= 1;
+ SE_4BIT(snibble);
+
+ predictor = (
+ ((sample1[current_channel] * coeff1[current_channel]) +
+ (sample2[current_channel] * coeff2[current_channel])) / 256) +
+ (snibble * idelta[current_channel]);
+ CLAMP_S16(predictor);
+ sample2[current_channel] = sample1[current_channel];
+ sample1[current_channel] = predictor;
+ output[out_ptr++] = predictor;
+
+ // compute the next adaptive scale factor (a.k.a. the variable idelta)
+ idelta[current_channel] =
+ (ms_adapt_table[nibble] * idelta[current_channel]) / 256;
+ CLAMP_ABOVE_16(idelta[current_channel]);
+
+ // toggle the channel
+ current_channel ^= channels - 1;
+ }
+
+ return MS_ADPCM_SAMPLES_PER_BLOCK * channels;
+}
diff --git a/adpcm.h b/adpcm.h
index c8b23d2264..48c0116ae8 100644
--- a/adpcm.h
+++ b/adpcm.h
@@ -4,29 +4,12 @@
#define IMA_ADPCM_BLOCK_SIZE 0x22
#define IMA_ADPCM_SAMPLES_PER_BLOCK 0x40
-static int adpcm_step[89] =
-{
- 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
- 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
- 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
- 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
- 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
- 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
- 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
- 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
- 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
-};
+#define MS_ADPCM_BLOCK_SIZE 256
+#define MS_ADPCM_SAMPLES_PER_BLOCK ((256 - 7) * 2)
-static int adpcm_index[16] =
-{
- -1, -1, -1, -1, 2, 4, 6, 8,
- -1, -1, -1, -1, 2, 4, 6, 8
-};
-
-static int format_0x62_table[16] =
-{
- 1, 3, 5, 7, 9, 11, 13, 15,
- -1, -3, -5, -7, -9, -11, -13, -15
-};
+int ima_adpcm_decode_block(unsigned short *output, unsigned char *input,
+ int channels);
+int ms_adpcm_decode_block(unsigned short *output, unsigned char *input,
+ int channels);
#endif
diff --git a/codec-cfg.c b/codec-cfg.c
index 2f9e4cbd44..dc81656d3c 100644
--- a/codec-cfg.c
+++ b/codec-cfg.c
@@ -212,10 +212,10 @@ static short get_driver(char *s,int audioflag)
"libvorbis",
"ffmpeg",
"libmad",
- "ima4",
+ "msadpcm",
"liba52",
"g72x",
- "adpcm",
+ "imaadpcm",
NULL
};
static char *videodrv[] = {
diff --git a/codec-cfg.h b/codec-cfg.h
index c9ee62e2d7..faaf797fcf 100644
--- a/codec-cfg.h
+++ b/codec-cfg.h
@@ -30,10 +30,10 @@
#define AFM_VORBIS 10
#define AFM_FFMPEG 11
#define AFM_MAD 12
-#define AFM_IMA4 13
+#define AFM_MSADPCM 13
#define AFM_A52 14
#define AFM_G72X 15
-#define AFM_ADPCM 16
+#define AFM_IMAADPCM 16
#define VFM_MPEG 1
#define VFM_VFW 2
diff --git a/dec_audio.c b/dec_audio.c
index c2f0a8b5d6..1e5400366e 100644
--- a/dec_audio.c
+++ b/dec_audio.c
@@ -278,13 +278,16 @@ case AFM_GSM:
// MS-GSM audio codec:
sh_audio->audio_out_minsize=4*320;
break;
-case AFM_IMA4:
-case AFM_ADPCM:
- // IMA-ADPCM 4:1 audio codec:
+case AFM_IMAADPCM:
sh_audio->audio_out_minsize=4096;
sh_audio->ds->ss_div=IMA_ADPCM_SAMPLES_PER_BLOCK;
sh_audio->ds->ss_mul=IMA_ADPCM_BLOCK_SIZE;
break;
+case AFM_MSADPCM:
+ sh_audio->audio_out_minsize=4096;
+ sh_audio->ds->ss_div=MS_ADPCM_SAMPLES_PER_BLOCK;
+ sh_audio->ds->ss_mul=MS_ADPCM_BLOCK_SIZE;
+ break;
case AFM_MPEG:
// MPEG Audio:
sh_audio->audio_out_minsize=4608;
@@ -503,15 +506,19 @@ case AFM_GSM: {
sh_audio->i_bps=65*(sh_audio->channels*sh_audio->samplerate)/320; // 1:10
break;
}
-case AFM_ADPCM:
-case AFM_IMA4: {
+case AFM_IMAADPCM:
// IMA-ADPCM 4:1 audio codec:
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
// decodes 34 byte -> 64 short
sh_audio->i_bps=IMA_ADPCM_BLOCK_SIZE*(sh_audio->channels*sh_audio->samplerate)/IMA_ADPCM_SAMPLES_PER_BLOCK; // 1:4
break;
-}
+case AFM_MSADPCM:
+ sh_audio->channels=sh_audio->wf->nChannels;
+ sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
+ sh_audio->i_bps=MS_ADPCM_BLOCK_SIZE*
+ (sh_audio->channels*sh_audio->samplerate)/MS_ADPCM_SAMPLES_PER_BLOCK;
+ break;
case AFM_MPEG: {
// MPEG Audio:
dec_audio_sh=sh_audio; // save sh_audio for the callback:
@@ -906,15 +913,22 @@ int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen){
memcpy(buf,g72x_data.samples,len);
break;
}
- case AFM_ADPCM:
- case AFM_IMA4: // IMA-ADPCM 4:1 audio codec:
+ case AFM_IMAADPCM:
{ unsigned char ibuf[IMA_ADPCM_BLOCK_SIZE * 2]; // bytes / stereo frame
if (demux_read_data(sh_audio->ds, ibuf,
- IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) !=
+ IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) !=
IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels)
break; // EOF
len=2*ima_adpcm_decode_block((unsigned short*)buf,ibuf, sh_audio->wf->nChannels);
-// len=2*ima4_decode_block((unsigned short*)buf,ibuf,2*IMA_ADPCM_SAMPLES_PER_BLOCK);
+ break;
+ }
+ case AFM_MSADPCM:
+ { unsigned char ibuf[MS_ADPCM_BLOCK_SIZE * 2]; // bytes / stereo frame
+ if (demux_read_data(sh_audio->ds, ibuf,
+ MS_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) !=
+ MS_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels)
+ break; // EOF
+ len=2*ms_adpcm_decode_block((unsigned short*)buf,ibuf, sh_audio->wf->nChannels);
break;
}
case AFM_AC3: // AC3 decoder
diff --git a/etc/codecs.conf b/etc/codecs.conf
index e52ef777b7..6fe7a3ce61 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -315,8 +315,13 @@ audiocodec imaadpcm
status working
format 0x11
format 0x34616d69 ; "ima4" (MOV files)
- driver adpcm
- dll "imaadpcm"
+ driver imaadpcm
+
+audiocodec msadpcm
+ info "MS ADPCM"
+ status working
+ format 0x2
+ driver msadpcm
; =============== WINDOWS DLL's ==============
@@ -792,12 +797,12 @@ audiocodec divx
dll "divxa32.acm"
cpuflags mmx
-audiocodec msadpcm
- info "MS ADPCM"
- status working
- format 0x2
- driver acm
- dll "msadp32.acm"
+;audiocodec msadpcm
+; info "MS ADPCM"
+; status working
+; format 0x2
+; driver acm
+; dll "msadp32.acm"
audiocodec mp3
info "MPEG layer-2, layer-3"
@@ -948,14 +953,6 @@ audiocodec vorbis
; driver acm
; dll "vorbis.acm"
-audiocodec ima4
- info "IMA4:1"
- status working
- comment "MONO only"
- format 0x34616d69 ; "ima4" (MOV files)
- driver ima4
- dll "ima4.c"
-
audiocodec vivoaudio
info "Vivo G.723/Siren Audio Codec"
status working
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-05 11:00:19 +0000