77 for(
i = 0;
i < 8;
i++ )
81 const unsigned int a4 = (
block[
i+2*8]>>1) - (
unsigned)
block[
i+6*8];
82 const unsigned int a6 = (
block[
i+6*8]>>1) + (
unsigned)
block[
i+2*8];
84 const unsigned int b0 =
a0 + a6;
85 const unsigned int b2 =
a2 +
a4;
86 const unsigned int b4 =
a2 -
a4;
87 const unsigned int b6 =
a0 - a6;
94 const int b1 = (a7>>2) + (
unsigned)
a1;
95 const int b3 = (unsigned)
a3 + (
a5>>2);
96 const int b5 = (
a3>>2) - (
unsigned)
a5;
97 const int b7 = (unsigned)a7 - (
a1>>2);
108 for(
i = 0;
i < 8;
i++ )
113 const unsigned a6 = (
block[6+
i*8]>>1) + (
unsigned)
block[2+
i*8];
115 const unsigned b0 =
a0 + a6;
116 const unsigned b2 =
a2 +
a4;
117 const unsigned b4 =
a2 -
a4;
118 const unsigned b6 =
a0 - a6;
125 const unsigned b1 = (a7>>2) + (
unsigned)
a1;
126 const unsigned b3 = (unsigned)
a3 + (
a5>>2);
127 const unsigned b5 = (
a3>>2) - (
unsigned)
a5;
128 const unsigned b7 = (unsigned)a7 - (
a1>>2);
151 for( j = 0; j < 4; j++ )
153 for(
i = 0;
i < 4;
i++ )
166 for( j = 0; j < 8; j++ )
168 for(
i = 0;
i < 8;
i++ )
177 int nnz = nnzc[
scan8[
i] ];
195 for(
i=0;
i<16;
i+=4){
196 int nnz = nnzc[
scan8[
i] ];
207 for(
i=j*16;
i<j*16+4;
i++){
220 for(
i=j*16;
i<j*16+4;
i++){
229 for(
i=j*16+4;
i<j*16+8;
i++){
251 const int z0= input[4*
i+0] + input[4*
i+1];
252 const int z1= input[4*
i+0] - input[4*
i+1];
253 const int z2= input[4*
i+2] - input[4*
i+3];
254 const int z3= input[4*
i+2] + input[4*
i+3];
279 const int xStride= 16;
282 static const uint8_t x_offset[2]={0, 16};
306 const int xStride= 16;
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
common internal and external API header
H.264 / AVC / MPEG-4 part10 codec.
static const uint8_t scan8[16 *3+3]
void FUNCC() ff_h264_idct_add8_422(uint8_t **dest, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15 *8])
void FUNCC() ff_h264_idct_add(uint8_t *_dst, int16_t *_block, int stride)
void FUNCC() ff_h264_chroma_dc_dequant_idct(int16_t *_block, int qmul)
void FUNCC() ff_h264_idct_add16(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15 *8])
void FUNCC() ff_h264_idct_dc_add(uint8_t *_dst, int16_t *_block, int stride)
void FUNCC() ff_h264_luma_dc_dequant_idct(int16_t *_output, int16_t *_input, int qmul)
IDCT transforms the 16 dc values and dequantizes them.
void FUNCC() ff_h264_idct8_add(uint8_t *_dst, int16_t *_block, int stride)
void FUNCC() ff_h264_idct8_add4(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15 *8])
void FUNCC() ff_h264_idct_add8(uint8_t **dest, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15 *8])
void FUNCC() ff_h264_idct_add16intra(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15 *8])
void FUNCC() ff_h264_chroma422_dc_dequant_idct(int16_t *_block, int qmul)
void FUNCC() ff_h264_idct8_dc_add(uint8_t *_dst, int16_t *_block, int stride)
static const uint8_t offset[127][2]
static double b1(void *priv, double x, double y)
static double b2(void *priv, double x, double y)
static double b3(void *priv, double x, double y)
static double b0(void *priv, double x, double y)