52 static const int TAB04[] = { 22725, 21407, 19266, 16384, 12873, 8867, 4520 };
53 static const int TAB17[] = { 31521, 29692, 26722, 22725, 17855, 12299, 6270 };
54 static const int TAB26[] = { 29692, 27969, 25172, 21407, 16819, 11585, 5906 };
55 static const int TAB35[] = { 26722, 25172, 22654, 19266, 15137, 10426, 5315 };
59 const unsigned c1 =
tab[0];
60 const unsigned c2 =
tab[1];
61 const unsigned c3 =
tab[2];
62 const unsigned c4 =
tab[3];
63 const unsigned c5 =
tab[4];
64 const unsigned c6 =
tab[5];
65 const unsigned c7 =
tab[6];
67 const int right =
in[5] |
in[6] |
in[7];
68 const int left =
in[1] |
in[2] |
in[3];
69 if (!(right |
in[4])) {
70 const int k = c4 *
in[0] +
rnd;
72 const unsigned a0 = k +
c2 *
in[2];
73 const unsigned a1 = k + c6 *
in[2];
74 const unsigned a2 = k - c6 *
in[2];
75 const unsigned a3 = k -
c2 *
in[2];
77 const int b0 =
c1 *
in[1] + c3 *
in[3];
78 const int b1 = c3 *
in[1] - c7 *
in[3];
79 const int b2 = c5 *
in[1] -
c1 *
in[3];
80 const int b3 = c7 *
in[1] - c5 *
in[3];
104 }
else if (!(left | right)) {
117 const unsigned int k = c4 *
in[0] +
rnd;
118 const unsigned int a0 = k +
c2 *
in[2] + c4 *
in[4] + c6 *
in[6];
119 const unsigned int a1 = k + c6 *
in[2] - c4 *
in[4] -
c2 *
in[6];
120 const unsigned int a2 = k - c6 *
in[2] - c4 *
in[4] +
c2 *
in[6];
121 const unsigned int a3 = k -
c2 *
in[2] + c4 *
in[4] - c6 *
in[6];
123 const unsigned int b0 =
c1 *
in[1] + c3 *
in[3] + c5 *
in[5] + c7 *
in[7];
124 const unsigned int b1 = c3 *
in[1] - c7 *
in[3] -
c1 *
in[5] - c5 *
in[7];
125 const unsigned int b2 = c5 *
in[1] -
c1 *
in[3] + c7 *
in[5] + c3 *
in[7];
126 const unsigned int b3 = c7 *
in[1] - c5 *
in[3] + c3 *
in[5] -
c1 *
in[7];
145 #define MULT(c, x, n) ((unsigned)((int)((c) * (unsigned)(x)) >> (n)))
149 #define BUTTERFLY(a, b, tmp) \
154 #define LOAD_BUTTERFLY(m1, m2, a, b, tmp, s) \
155 (m1) = (s)[(a)] + (s)[(b)]; \
156 (m2) = (s)[(a)] - (s)[(b)]
160 int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;
164 mm4 = (
int)
in[7 * 8];
165 mm5 = (
int)
in[5 * 8];
166 mm6 = (
int)
in[3 * 8];
167 mm7 = (
int)
in[1 * 8];
186 mm1 = (
int)
in[2 * 8];
187 mm2 = (
int)
in[6 * 8];
212 int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;
216 mm0 = (
int)
in[1 * 8];
217 mm2 = (
int)
in[3 * 8];
233 mm0 = mm1 = (
int)
in[0 * 8];
234 mm3 = (
int)
in[2 * 8];
256 int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;
260 mm7 = (
int)
in[1 * 8];
270 mm0 = mm1 = (
int)
in[0 * 8];
271 mm3 = (
int)
in[2 * 8];
310 for (
i = 0;
i < 8;
i++)
312 }
else if (rows & 0x08) {
313 for (
i = 0;
i < 8;
i++)
316 for (
i = 0;
i < 8;
i++)
337 if (high_bit_depth || avctx->
lowres ||
Macro definitions for various function/variable attributes.
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-> in
Libavcodec external API header.
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
void ff_add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
void ff_put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
main external API structure.
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
static const struct twinvq_data tab
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)
#define BUTTERFLY(a, b, tmp)
static void idct_col_3(short *const in)
static void idct_col_4(short *const in)
void ff_xvid_idct(int16_t *const in)
static int idct_row(short *in, const int *const tab, int rnd)
av_cold void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx)
static void xvid_idct_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
static void idct_col_8(short *const in)
#define LOAD_BUTTERFLY(m1, m2, a, b, tmp, s)
static void xvid_idct_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
av_cold void ff_xvid_idct_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
av_cold void ff_xvid_idct_init_mips(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)