ADPCM encoders First version by Francois Revol (revol.nosp@m.@fre.nosp@m.e.fr) Fringe ADPCM codecs (e.g., DK3, DK4, Westwood) by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t)
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#include "avcodec.h"
#include "get_bits.h"
#include "put_bits.h"
#include "bytestream.h"
#include "adpcm.h"
#include "adpcm_data.h"
Go to the source code of this file.
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static av_cold int | adpcm_encode_init (AVCodecContext *avctx) |
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static av_cold int | adpcm_encode_close (AVCodecContext *avctx) |
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static unsigned char | adpcm_ima_compress_sample (ADPCMChannelStatus *c, short sample) |
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static unsigned char | adpcm_ima_qt_compress_sample (ADPCMChannelStatus *c, short sample) |
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static unsigned char | adpcm_ms_compress_sample (ADPCMChannelStatus *c, short sample) |
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static unsigned char | adpcm_yamaha_compress_sample (ADPCMChannelStatus *c, short sample) |
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static void | adpcm_compress_trellis (AVCodecContext *avctx, const short *samples, uint8_t *dst, ADPCMChannelStatus *c, int n) |
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static int | adpcm_encode_frame (AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data) |
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| ADPCM_ENCODER (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt,"ADPCM IMA QuickTime") |
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| ADPCM_ENCODER (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav,"ADPCM IMA WAV") |
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| ADPCM_ENCODER (CODEC_ID_ADPCM_MS, adpcm_ms,"ADPCM Microsoft") |
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| ADPCM_ENCODER (CODEC_ID_ADPCM_SWF, adpcm_swf,"ADPCM Shockwave Flash") |
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| ADPCM_ENCODER (CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha,"ADPCM Yamaha") |
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ADPCM encoders First version by Francois Revol (revol.nosp@m.@fre.nosp@m.e.fr) Fringe ADPCM codecs (e.g., DK3, DK4, Westwood) by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t)
See ADPCM decoder reference documents for codec information.
Definition in file adpcmenc.c.
#define ADPCM_ENCODER |
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id_, |
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name_, |
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long_name_ |
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Value:AVCodec ff_ ## name_ ## _encoder = { \
.id = id_, \
}
static av_cold int adpcm_encode_init(AVCodecContext *avctx)
static av_cold int adpcm_encode_close(AVCodecContext *avctx)
static int init(AVCodecParserContext *s)
static int adpcm_encode_frame(AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
static void close(AVCodecParserContext *s)
AVSampleFormat
all in native-endian format
struct ADPCMEncodeContext ADPCMEncodeContext
Definition at line 698 of file adpcmenc.c.
#define FREEZE_INTERVAL 128 |
#define LOOP_NODES |
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NAME, |
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STEP_TABLE, |
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STEP_INDEX |
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Value:const int predictor = nodes[j]->sample1;\
const int div = (sample - predictor) * 4 / STEP_TABLE;\
int nmin = av_clip(div - range, -7, 6);\
int nmax = av_clip(div + range, -6, 7);\
if (nmin <= 0)\
nmin--; \
if (nmax < 0)\
for (nidx = nmin; nidx <= nmax; nidx++) {\
const int nibble = nidx < 0 ? 7 - nidx : nidx;\
int dec_sample = predictor +\
}
#define STORE_NODE(NAME, STEP_INDEX)
const int8_t ff_adpcm_yamaha_difflookup[]
Referenced by adpcm_compress_trellis().
#define STORE_NODE |
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NAME, |
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STEP_INDEX |
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static int adpcm_encode_frame |
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AVCodecContext * |
avctx, |
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unsigned char * |
frame, |
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int |
buf_size, |
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void * |
data |
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static |
static unsigned char adpcm_ima_qt_compress_sample |
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ADPCMChannelStatus * |
c, |
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short |
sample |
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inlinestatic |
static unsigned char adpcm_yamaha_compress_sample |
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ADPCMChannelStatus * |
c, |
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short |
sample |
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inlinestatic |