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686959e87e
* qatar/master: doxygen: Consistently use '@' instead of '\' for Doxygen markup. Use av_printf_format to check the usage of printf style functions Add av_printf_format, for marking printf style format strings and their parameters ARM: enable thumb for Cortex-M* CPUs nsvdec: Propagate error values instead of returning 0 in nsv_read_header(). build: remove SRC_PATH_BARE variable build: move basic rules and variables to main Makefile build: move special targets to end of main Makefile lavdev: improve feedback in case of invalid frame rate/size vfwcap: prefer "framerate_q" over "fps" in vfw_read_header() v4l2: prefer "framerate_q" over "fps" in v4l2_set_parameters() fbdev: prefer "framerate_q" over "fps" in device context bktr: prefer "framerate" over "fps" for grab_read_header() ALSA: implement channel layout for playback. alsa: support unsigned variants of already supported signed formats. alsa: add support for more formats. ARM: allow building in Thumb2 mode Conflicts: common.mak doc/APIchanges libavcodec/vdpau.h libavdevice/alsa-audio-common.c libavdevice/fbdev.c libavdevice/libdc1394.c libavutil/avutil.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
79 lines
2.7 KiB
ArmAsm
79 lines
2.7 KiB
ArmAsm
/*
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* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "config.h"
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#include "asm.S"
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/**
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* ARM VFP optimized float to int16 conversion.
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* Assume that len is a positive number and is multiple of 8, destination
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* buffer is at least 4 bytes aligned (8 bytes alignment is better for
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* performance), little endian byte sex
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*/
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@ void ff_float_to_int16_vfp(int16_t *dst, const float *src, int len)
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function ff_float_to_int16_vfp, export=1
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push {r4-r8,lr}
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vpush {d8-d11}
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vldmia r1!, {s16-s23}
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vcvt.s32.f32 s0, s16
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vcvt.s32.f32 s1, s17
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vcvt.s32.f32 s2, s18
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vcvt.s32.f32 s3, s19
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vcvt.s32.f32 s4, s20
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vcvt.s32.f32 s5, s21
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vcvt.s32.f32 s6, s22
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vcvt.s32.f32 s7, s23
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1:
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subs r2, r2, #8
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vmov r3, r4, s0, s1
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vmov r5, r6, s2, s3
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vmov r7, r8, s4, s5
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vmov ip, lr, s6, s7
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it gt
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vldmiagt r1!, {s16-s23}
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ssat r4, #16, r4
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ssat r3, #16, r3
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ssat r6, #16, r6
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ssat r5, #16, r5
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pkhbt r3, r3, r4, lsl #16
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pkhbt r4, r5, r6, lsl #16
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itttt gt
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vcvtgt.s32.f32 s0, s16
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vcvtgt.s32.f32 s1, s17
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vcvtgt.s32.f32 s2, s18
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vcvtgt.s32.f32 s3, s19
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itttt gt
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vcvtgt.s32.f32 s4, s20
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vcvtgt.s32.f32 s5, s21
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vcvtgt.s32.f32 s6, s22
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vcvtgt.s32.f32 s7, s23
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ssat r8, #16, r8
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ssat r7, #16, r7
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ssat lr, #16, lr
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ssat ip, #16, ip
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pkhbt r5, r7, r8, lsl #16
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pkhbt r6, ip, lr, lsl #16
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stmia r0!, {r3-r6}
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bgt 1b
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vpop {d8-d11}
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pop {r4-r8,pc}
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endfunc
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