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https://git.ffmpeg.org/ffmpeg.git
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flacdsp: move lpc encoding from FLAC encoder to FLACDSPContext
Also, templatize the functions for 16-bit and 32-bit sample range. This will be used for 24-bit FLAC encoding.
This commit is contained in:
Justin Ruggles
parent
5ff998a233
commit
799e232490
@ -26,6 +26,7 @@
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#define SAMPLE_SIZE 16
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#define PLANAR 0
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#include "flacdsp_template.c"
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#include "flacdsp_lpc_template.c"
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#undef PLANAR
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#define PLANAR 1
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@ -36,6 +37,7 @@
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#define SAMPLE_SIZE 32
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#define PLANAR 0
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#include "flacdsp_template.c"
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#include "flacdsp_lpc_template.c"
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#undef PLANAR
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#define PLANAR 1
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@ -86,10 +88,13 @@ static void flac_lpc_32_c(int32_t *decoded, const int coeffs[32],
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av_cold void ff_flacdsp_init(FLACDSPContext *c, enum AVSampleFormat fmt,
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int bps)
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{
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if (bps > 16)
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if (bps > 16) {
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c->lpc = flac_lpc_32_c;
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else
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c->lpc_encode = flac_lpc_encode_c_32;
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} else {
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c->lpc = flac_lpc_16_c;
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c->lpc_encode = flac_lpc_encode_c_16;
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}
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switch (fmt) {
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case AV_SAMPLE_FMT_S32:
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@ -27,6 +27,8 @@ typedef struct FLACDSPContext {
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int len, int shift);
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void (*lpc)(int32_t *samples, const int coeffs[32], int order,
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int qlevel, int len);
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void (*lpc_encode)(int32_t *res, const int32_t *smp, int len, int order,
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const int32_t *coefs, int shift);
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} FLACDSPContext;
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void ff_flacdsp_init(FLACDSPContext *c, enum AVSampleFormat fmt, int bps);
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141
libavcodec/flacdsp_lpc_template.c
Normal file
141
libavcodec/flacdsp_lpc_template.c
Normal file
@ -0,0 +1,141 @@
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/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "libavutil/avutil.h"
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#include "mathops.h"
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#undef FUNC
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#undef sum_type
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#undef MUL
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#undef CLIP
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#undef FSUF
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#define FUNC(n) AV_JOIN(n ## _, SAMPLE_SIZE)
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#if SAMPLE_SIZE == 32
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# define sum_type int64_t
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# define MUL(a, b) MUL64(a, b)
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# define CLIP(x) av_clipl_int32(x)
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#else
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# define sum_type int32_t
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# define MUL(a, b) ((a) * (b))
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# define CLIP(x) (x)
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#endif
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#define LPC1(x) { \
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int c = coefs[(x)-1]; \
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p0 += MUL(c, s); \
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s = smp[i-(x)+1]; \
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p1 += MUL(c, s); \
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}
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static av_always_inline void FUNC(lpc_encode_unrolled)(int32_t *res,
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const int32_t *smp, int len, int order,
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const int32_t *coefs, int shift, int big)
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{
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int i;
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for (i = order; i < len; i += 2) {
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int s = smp[i-order];
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sum_type p0 = 0, p1 = 0;
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if (big) {
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switch (order) {
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case 32: LPC1(32)
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case 31: LPC1(31)
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case 30: LPC1(30)
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case 29: LPC1(29)
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case 28: LPC1(28)
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case 27: LPC1(27)
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case 26: LPC1(26)
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case 25: LPC1(25)
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case 24: LPC1(24)
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case 23: LPC1(23)
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case 22: LPC1(22)
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case 21: LPC1(21)
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case 20: LPC1(20)
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case 19: LPC1(19)
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case 18: LPC1(18)
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case 17: LPC1(17)
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case 16: LPC1(16)
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case 15: LPC1(15)
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case 14: LPC1(14)
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case 13: LPC1(13)
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case 12: LPC1(12)
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case 11: LPC1(11)
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case 10: LPC1(10)
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case 9: LPC1( 9)
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LPC1( 8)
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LPC1( 7)
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LPC1( 6)
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LPC1( 5)
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LPC1( 4)
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LPC1( 3)
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LPC1( 2)
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LPC1( 1)
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}
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} else {
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switch (order) {
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case 8: LPC1( 8)
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case 7: LPC1( 7)
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case 6: LPC1( 6)
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case 5: LPC1( 5)
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case 4: LPC1( 4)
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case 3: LPC1( 3)
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case 2: LPC1( 2)
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case 1: LPC1( 1)
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}
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}
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res[i ] = smp[i ] - CLIP(p0 >> shift);
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res[i+1] = smp[i+1] - CLIP(p1 >> shift);
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}
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}
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static void FUNC(flac_lpc_encode_c)(int32_t *res, const int32_t *smp, int len,
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int order, const int32_t *coefs, int shift)
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{
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int i;
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for (i = 0; i < order; i++)
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res[i] = smp[i];
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#if CONFIG_SMALL
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for (i = order; i < len; i += 2) {
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int j;
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int s = smp[i];
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sum_type p0 = 0, p1 = 0;
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for (j = 0; j < order; j++) {
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int c = coefs[j];
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p1 += MUL(c, s);
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s = smp[i-j-1];
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p0 += MUL(c, s);
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}
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res[i ] = smp[i ] - CLIP(p0 >> shift);
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res[i+1] = smp[i+1] - CLIP(p1 >> shift);
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}
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#else
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switch (order) {
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case 1: FUNC(lpc_encode_unrolled)(res, smp, len, 1, coefs, shift, 0); break;
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case 2: FUNC(lpc_encode_unrolled)(res, smp, len, 2, coefs, shift, 0); break;
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case 3: FUNC(lpc_encode_unrolled)(res, smp, len, 3, coefs, shift, 0); break;
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case 4: FUNC(lpc_encode_unrolled)(res, smp, len, 4, coefs, shift, 0); break;
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case 5: FUNC(lpc_encode_unrolled)(res, smp, len, 5, coefs, shift, 0); break;
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case 6: FUNC(lpc_encode_unrolled)(res, smp, len, 6, coefs, shift, 0); break;
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case 7: FUNC(lpc_encode_unrolled)(res, smp, len, 7, coefs, shift, 0); break;
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case 8: FUNC(lpc_encode_unrolled)(res, smp, len, 8, coefs, shift, 0); break;
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default: FUNC(lpc_encode_unrolled)(res, smp, len, order, coefs, shift, 1); break;
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}
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#endif
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}
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@ -31,6 +31,7 @@
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#include "lpc.h"
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#include "flac.h"
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#include "flacdata.h"
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#include "flacdsp.h"
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#define FLAC_SUBFRAME_CONSTANT 0
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#define FLAC_SUBFRAME_VERBATIM 1
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@ -106,6 +107,7 @@ typedef struct FlacEncodeContext {
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uint8_t *md5_buffer;
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unsigned int md5_buffer_size;
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DSPContext dsp;
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FLACDSPContext flac_dsp;
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} FlacEncodeContext;
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@ -385,6 +387,7 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
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s->options.max_prediction_order, FF_LPC_TYPE_LEVINSON);
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ff_dsputil_init(&s->dsp, avctx);
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ff_flacdsp_init(&s->flac_dsp, avctx->sample_fmt, 16);
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dprint_compression_options(s);
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@ -684,110 +687,6 @@ static void encode_residual_fixed(int32_t *res, const int32_t *smp, int n,
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}
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#define LPC1(x) {\
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int c = coefs[(x)-1];\
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p0 += c * s;\
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s = smp[i-(x)+1];\
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p1 += c * s;\
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}
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static av_always_inline void encode_residual_lpc_unrolled(int32_t *res,
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const int32_t *smp, int n, int order,
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const int32_t *coefs, int shift, int big)
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{
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int i;
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for (i = order; i < n; i += 2) {
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int s = smp[i-order];
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int p0 = 0, p1 = 0;
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if (big) {
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switch (order) {
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case 32: LPC1(32)
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case 31: LPC1(31)
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case 30: LPC1(30)
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case 29: LPC1(29)
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case 28: LPC1(28)
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case 27: LPC1(27)
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case 26: LPC1(26)
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case 25: LPC1(25)
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case 24: LPC1(24)
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case 23: LPC1(23)
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case 22: LPC1(22)
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case 21: LPC1(21)
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case 20: LPC1(20)
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case 19: LPC1(19)
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case 18: LPC1(18)
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case 17: LPC1(17)
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case 16: LPC1(16)
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case 15: LPC1(15)
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case 14: LPC1(14)
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case 13: LPC1(13)
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case 12: LPC1(12)
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case 11: LPC1(11)
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case 10: LPC1(10)
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case 9: LPC1( 9)
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LPC1( 8)
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LPC1( 7)
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LPC1( 6)
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LPC1( 5)
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LPC1( 4)
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LPC1( 3)
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LPC1( 2)
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LPC1( 1)
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}
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} else {
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switch (order) {
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case 8: LPC1( 8)
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case 7: LPC1( 7)
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case 6: LPC1( 6)
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case 5: LPC1( 5)
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case 4: LPC1( 4)
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case 3: LPC1( 3)
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case 2: LPC1( 2)
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case 1: LPC1( 1)
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}
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}
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res[i ] = smp[i ] - (p0 >> shift);
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res[i+1] = smp[i+1] - (p1 >> shift);
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}
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}
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static void encode_residual_lpc(int32_t *res, const int32_t *smp, int n,
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int order, const int32_t *coefs, int shift)
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{
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int i;
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for (i = 0; i < order; i++)
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res[i] = smp[i];
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#if CONFIG_SMALL
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for (i = order; i < n; i += 2) {
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int j;
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int s = smp[i];
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int p0 = 0, p1 = 0;
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for (j = 0; j < order; j++) {
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int c = coefs[j];
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p1 += c * s;
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s = smp[i-j-1];
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p0 += c * s;
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}
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res[i ] = smp[i ] - (p0 >> shift);
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res[i+1] = smp[i+1] - (p1 >> shift);
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}
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#else
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switch (order) {
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case 1: encode_residual_lpc_unrolled(res, smp, n, 1, coefs, shift, 0); break;
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case 2: encode_residual_lpc_unrolled(res, smp, n, 2, coefs, shift, 0); break;
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case 3: encode_residual_lpc_unrolled(res, smp, n, 3, coefs, shift, 0); break;
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case 4: encode_residual_lpc_unrolled(res, smp, n, 4, coefs, shift, 0); break;
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case 5: encode_residual_lpc_unrolled(res, smp, n, 5, coefs, shift, 0); break;
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case 6: encode_residual_lpc_unrolled(res, smp, n, 6, coefs, shift, 0); break;
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case 7: encode_residual_lpc_unrolled(res, smp, n, 7, coefs, shift, 0); break;
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case 8: encode_residual_lpc_unrolled(res, smp, n, 8, coefs, shift, 0); break;
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default: encode_residual_lpc_unrolled(res, smp, n, order, coefs, shift, 1); break;
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}
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#endif
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}
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static int encode_residual_ch(FlacEncodeContext *s, int ch)
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{
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int i, n;
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@ -869,7 +768,8 @@ static int encode_residual_ch(FlacEncodeContext *s, int ch)
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order = min_order + (((max_order-min_order+1) * (i+1)) / levels)-1;
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if (order < 0)
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order = 0;
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encode_residual_lpc(res, smp, n, order+1, coefs[order], shift[order]);
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s->flac_dsp.lpc_encode(res, smp, n, order+1, coefs[order],
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shift[order]);
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bits[i] = find_subframe_rice_params(s, sub, order+1);
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if (bits[i] < bits[opt_index]) {
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opt_index = i;
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@ -883,7 +783,7 @@ static int encode_residual_ch(FlacEncodeContext *s, int ch)
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opt_order = 0;
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bits[0] = UINT32_MAX;
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for (i = min_order-1; i < max_order; i++) {
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encode_residual_lpc(res, smp, n, i+1, coefs[i], shift[i]);
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s->flac_dsp.lpc_encode(res, smp, n, i+1, coefs[i], shift[i]);
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bits[i] = find_subframe_rice_params(s, sub, i+1);
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if (bits[i] < bits[opt_order])
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opt_order = i;
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@ -901,7 +801,7 @@ static int encode_residual_ch(FlacEncodeContext *s, int ch)
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for (i = last-step; i <= last+step; i += step) {
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if (i < min_order-1 || i >= max_order || bits[i] < UINT32_MAX)
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continue;
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encode_residual_lpc(res, smp, n, i+1, coefs[i], shift[i]);
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s->flac_dsp.lpc_encode(res, smp, n, i+1, coefs[i], shift[i]);
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bits[i] = find_subframe_rice_params(s, sub, i+1);
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if (bits[i] < bits[opt_order])
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opt_order = i;
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@ -916,7 +816,7 @@ static int encode_residual_ch(FlacEncodeContext *s, int ch)
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for (i = 0; i < sub->order; i++)
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sub->coefs[i] = coefs[sub->order-1][i];
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encode_residual_lpc(res, smp, n, sub->order, sub->coefs, sub->shift);
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s->flac_dsp.lpc_encode(res, smp, n, sub->order, sub->coefs, sub->shift);
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find_subframe_rice_params(s, sub, sub->order);
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