[SCM] libav/experimental: add Creative 8 bits ADPCM schemes support
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:46:34 UTC 2013
The following commit has been merged in the experimental branch:
commit 2433f24f60bc4087907fee57b3b1a8f04b2b37b2
Author: Aurelien Jacobs <aurel at gnuage.org>
Date: Thu Feb 16 00:09:23 2006 +0000
add Creative 8 bits ADPCM schemes support
Originally committed as revision 5024 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi
index 4ca0334..6ad6eae 100644
--- a/doc/ffmpeg-doc.texi
+++ b/doc/ffmpeg-doc.texi
@@ -833,6 +833,7 @@ other implementations.
@item Electronic Arts ADPCM @tab @tab X
@tab Used in various EA titles.
@item Creative ADPCM @tab @tab X
+ at tab 16 -> 4, 8 -> 4, 8 -> 3, 8 -> 2
@item RA144 @tab @tab X
@tab Real 14400 bit/s codec
@item RA288 @tab @tab X
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index ed3106a..de66daf 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -514,6 +514,34 @@ static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
return (short)predictor;
}
+static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
+{
+ int sign, delta, diff;
+
+ sign = nibble & (1<<(size-1));
+ delta = nibble & ((1<<(size-1))-1);
+ diff = delta << (7 + c->step + shift);
+
+ if (sign)
+ c->predictor -= diff;
+ else
+ c->predictor += diff;
+
+ /* clamp result */
+ if (c->predictor > 16256)
+ c->predictor = 16256;
+ else if (c->predictor < -16384)
+ c->predictor = -16384;
+
+ /* calculate new step */
+ if (delta >= (2*size - 3) && c->step < 3)
+ c->step++;
+ else if (delta == 0 && c->step > 0)
+ c->step--;
+
+ return (short) c->predictor;
+}
+
static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
{
if(!c->step) {
@@ -644,7 +672,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
samples = data;
src = buf;
- st = avctx->channels == 2;
+ st = avctx->channels == 2 ? 1 : 0;
switch(avctx->codec->id) {
case CODEC_ID_ADPCM_IMA_QT:
@@ -973,6 +1001,48 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
src++;
}
break;
+ case CODEC_ID_ADPCM_SBPRO_4:
+ case CODEC_ID_ADPCM_SBPRO_3:
+ case CODEC_ID_ADPCM_SBPRO_2:
+ if (!c->status[0].step_index) {
+ /* the first byte is a raw sample */
+ *samples++ = 128 * (*src++ - 0x80);
+ if (st)
+ *samples++ = 128 * (*src++ - 0x80);
+ c->status[0].step_index = 1;
+ }
+ if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
+ while (src < buf + buf_size) {
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
+ (src[0] >> 4) & 0x0F, 4, 0);
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
+ src[0] & 0x0F, 4, 0);
+ src++;
+ }
+ } else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
+ while (src < buf + buf_size) {
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
+ (src[0] >> 5) & 0x07, 3, 0);
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
+ (src[0] >> 2) & 0x07, 3, 0);
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
+ src[0] & 0x03, 2, 0);
+ src++;
+ }
+ } else {
+ while (src < buf + buf_size) {
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
+ (src[0] >> 6) & 0x03, 2, 2);
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
+ (src[0] >> 4) & 0x03, 2, 2);
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
+ (src[0] >> 2) & 0x03, 2, 2);
+ *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
+ src[0] & 0x03, 2, 2);
+ src++;
+ }
+ }
+ break;
case CODEC_ID_ADPCM_SWF:
{
GetBitContext gb;
@@ -1117,5 +1187,8 @@ ADPCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
ADPCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
ADPCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
ADPCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
+ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
+ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
+ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
#undef ADPCM_CODEC
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index f3238f2..4730af1 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -593,6 +593,9 @@ PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
#undef PCM_CODEC
/* subtitles */
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 10167d7..3e050a9 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -21,8 +21,8 @@ extern "C" {
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
-#define LIBAVCODEC_VERSION_INT ((51<<16)+(5<<8)+0)
-#define LIBAVCODEC_VERSION 51.5.0
+#define LIBAVCODEC_VERSION_INT ((51<<16)+(6<<8)+0)
+#define LIBAVCODEC_VERSION 51.6.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
@@ -153,6 +153,9 @@ enum CodecID {
CODEC_ID_ADPCM_CT,
CODEC_ID_ADPCM_SWF,
CODEC_ID_ADPCM_YAMAHA,
+ CODEC_ID_ADPCM_SBPRO_4,
+ CODEC_ID_ADPCM_SBPRO_3,
+ CODEC_ID_ADPCM_SBPRO_2,
/* AMR */
CODEC_ID_AMR_NB= 0x12000,
@@ -2271,6 +2274,9 @@ PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
#undef PCM_CODEC
diff --git a/libavformat/voc.c b/libavformat/voc.c
index 712f71a..7fb8550 100644
--- a/libavformat/voc.c
+++ b/libavformat/voc.c
@@ -41,6 +41,9 @@ static const unsigned char voc_magic[] = "Creative Voice File\x1A";
static const CodecTag voc_codec_tags[] = {
{CODEC_ID_PCM_U8, 0x00},
+ {CODEC_ID_ADPCM_SBPRO_4, 0x01},
+ {CODEC_ID_ADPCM_SBPRO_3, 0x02},
+ {CODEC_ID_ADPCM_SBPRO_2, 0x03},
{CODEC_ID_PCM_S16LE, 0x04},
{CODEC_ID_PCM_ALAW, 0x06},
{CODEC_ID_PCM_MULAW, 0x07},
--
Libav/FFmpeg packaging
More information about the pkg-multimedia-commits
mailing list