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synced 2024-12-23 12:43:46 +02:00
Remove obsolete liba52 wrapper code.
Originally committed as revision 15571 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Diego Biurrun
parent
66e9aa7463
commit
d8d12c1594
@ -137,6 +137,7 @@ version <next>
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- E-AC-3 support added to AC-3 decoder
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- Nellymoser ASAO encoder
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- ASS and SSA demuxer and muxer
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- liba52 wrapper removed
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version 0.4.9-pre1:
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12
configure
vendored
12
configure
vendored
@ -87,8 +87,6 @@ show_help(){
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echo
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echo "External library support:"
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echo " --enable-mlib use Sun medialib [default=no]"
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echo " --enable-liba52 enable GPLed liba52 support [default=no]"
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echo " --enable-liba52bin open liba52.so.0 at runtime [default=no]"
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echo " --enable-avisynth allow reading AVISynth script files [default=no]"
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echo " --enable-libamr-nb enable libamr-nb floating point audio codec"
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echo " --enable-libamr-wb enable libamr-wb floating point audio codec"
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@ -666,8 +664,6 @@ CONFIG_LIST="
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gray
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hardcoded_tables
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ipv6
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liba52
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liba52bin
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libamr_nb
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libamr_wb
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libdc1394
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@ -852,7 +848,7 @@ vis_deps="sparc"
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byteswap_h_deps="!armv4l"
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# decoders / encoders
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ac3_decoder_deps="gpl !liba52"
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ac3_decoder_deps="gpl"
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dxa_decoder_deps="zlib"
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eac3_decoder_deps="gpl"
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flashsv_decoder_deps="zlib"
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@ -865,8 +861,6 @@ zmbv_decoder_deps="zlib"
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zmbv_encoder_deps="zlib"
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# external libraries
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liba52_decoder_deps="liba52"
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liba52bin_decoder_extralibs='$ldl'
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libamr_nb_decoder_deps="libamr_nb"
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libamr_nb_encoder_deps="libamr_nb"
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libamr_wb_decoder_deps="libamr_wb"
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@ -1407,7 +1401,6 @@ if ! enabled gpl; then
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enabled_any $@ && die "$name is under GPL and --enable-gpl is not specified."
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}
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die_gpl_disabled "The Postprocessing code" postproc
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die_gpl_disabled "liba52" liba52
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die_gpl_disabled "libx264" libx264
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die_gpl_disabled "libxvidcore" libxvid
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die_gpl_disabled "FAAD2" libfaad2
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@ -1704,7 +1697,6 @@ done
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# these are off by default, so fail if requested and not available
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enabled avisynth && require2 vfw32 "windows.h vfw.h" AVIFileInit -lvfw32
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enabled liba52 && require liba52 a52dec/a52.h a52_init -la52
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enabled libamr_nb && require libamrnb amrnb/interf_dec.h Speech_Decode_Frame_init -lamrnb -lm
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enabled libamr_wb && require libamrwb amrwb/dec_if.h D_IF_init -lamrwb -lm
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enabled libdirac && add_cflags "$(pkg-config --cflags dirac)" \
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@ -2010,8 +2002,6 @@ if enabled sdl_too_old; then
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fi
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echo "Sun medialib support ${mlib-no}"
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echo "AVISynth enabled ${avisynth-no}"
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echo "liba52 support ${liba52-no}"
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echo "liba52 dlopened ${liba52bin-no}"
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echo "libamr-nb support ${libamr_nb-no}"
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echo "libamr-wb support ${libamr_wb-no}"
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echo "libdc1394 support ${libdc1394-no}"
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@ -339,7 +339,6 @@ following image formats are supported:
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@item AAC @tab X @tab X
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@tab Encoding is supported through the external library libfaac.
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@item AC-3 @tab IX @tab IX
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@tab liba52 can be used alternatively for decoding.
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@item AMR-NB @tab X @tab X
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@tab Supported through an external library.
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@item AMR-WB @tab X @tab X
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@ -324,7 +324,6 @@ OBJS-$(CONFIG_OGG_MUXER) += xiph.o
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OBJS-$(CONFIG_RTP_MUXER) += mpegvideo.o
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# external codec libraries
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OBJS-$(CONFIG_LIBA52) += liba52.o
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OBJS-$(CONFIG_LIBAMR_NB) += libamr.o
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OBJS-$(CONFIG_LIBAMR_WB) += libamr.o
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OBJS-$(CONFIG_LIBDIRAC_DECODER) += libdiracdec.o
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@ -495,3 +494,4 @@ DIRS = alpha armv4l bfin i386 mlib ppc ps2 sh4 sparc
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include $(SUBDIR)../subdir.mak
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$(SUBDIR)dct-test$(EXESUF): $(SUBDIR)fdctref.o
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$(SUBDIR)fft-test$(EXESUF): $(SUBDIR)fdctref.o
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@ -284,7 +284,6 @@ void avcodec_register_all(void)
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REGISTER_ENCDEC (DVDSUB, dvdsub);
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/* external libraries */
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REGISTER_DECODER (LIBA52, liba52);
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REGISTER_ENCDEC (LIBAMR_NB, libamr_nb);
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REGISTER_ENCDEC (LIBAMR_WB, libamr_wb);
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REGISTER_ENCDEC (LIBDIRAC, libdirac);
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@ -1,227 +0,0 @@
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/*
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* A52 decoder using liba52
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* Copyright (c) 2001 Fabrice Bellard.
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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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/**
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* @file a52dec.c
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* A52 decoder using liba52
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*/
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#include "avcodec.h"
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#include <a52dec/a52.h>
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#ifdef CONFIG_LIBA52BIN
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#include <dlfcn.h>
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static const char* const liba52name = "liba52.so.0";
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#endif
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/**
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* liba52 - Copyright (C) Aaron Holtzman
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* released under the GPL license.
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*/
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typedef struct AC3DecodeState {
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int flags;
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int channels;
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a52_state_t* state;
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sample_t* samples;
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/*
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* virtual method table
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*
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* using this function table so the liba52 doesn't
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* have to be really linked together with ffmpeg
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* and might be linked in runtime - this allows binary
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* distribution of ffmpeg library which doens't depend
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* on liba52 library - but if user has it installed
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* it will be used - user might install such library
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* separately
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*/
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void* handle;
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a52_state_t* (*a52_init)(uint32_t mm_accel);
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sample_t* (*a52_samples)(a52_state_t * state);
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int (*a52_syncinfo)(uint8_t * buf, int * flags,
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int * sample_rate, int * bit_rate);
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int (*a52_frame)(a52_state_t * state, uint8_t * buf, int * flags,
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sample_t * level, sample_t bias);
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void (*a52_dynrng)(a52_state_t * state,
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sample_t (* call) (sample_t, void *), void * data);
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int (*a52_block)(a52_state_t * state);
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void (*a52_free)(a52_state_t * state);
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} AC3DecodeState;
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#ifdef CONFIG_LIBA52BIN
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static void* dlsymm(void* handle, const char* symbol)
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{
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void* f = dlsym(handle, symbol);
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if (!f)
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av_log( NULL, AV_LOG_ERROR, "A52 Decoder - function '%s' can't be resolved\n", symbol);
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return f;
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}
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#endif
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static av_cold int a52_decode_init(AVCodecContext *avctx)
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{
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AC3DecodeState *s = avctx->priv_data;
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#ifdef CONFIG_LIBA52BIN
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s->handle = dlopen(liba52name, RTLD_LAZY);
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if (!s->handle)
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{
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av_log( avctx, AV_LOG_ERROR, "A52 library %s could not be opened! \n%s\n", liba52name, dlerror());
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return -1;
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}
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s->a52_init = (a52_state_t* (*)(uint32_t)) dlsymm(s->handle, "a52_init");
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s->a52_samples = (sample_t* (*)(a52_state_t*)) dlsymm(s->handle, "a52_samples");
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s->a52_syncinfo = (int (*)(uint8_t*, int*, int*, int*)) dlsymm(s->handle, "a52_syncinfo");
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s->a52_frame = (int (*)(a52_state_t*, uint8_t*, int*, sample_t*, sample_t)) dlsymm(s->handle, "a52_frame");
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s->a52_block = (int (*)(a52_state_t*)) dlsymm(s->handle, "a52_block");
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s->a52_free = (void (*)(a52_state_t*)) dlsymm(s->handle, "a52_free");
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if (!s->a52_init || !s->a52_samples || !s->a52_syncinfo
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|| !s->a52_frame || !s->a52_block || !s->a52_free)
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{
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dlclose(s->handle);
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return -1;
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}
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#else
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s->handle = 0;
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s->a52_init = a52_init;
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s->a52_samples = a52_samples;
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s->a52_syncinfo = a52_syncinfo;
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s->a52_frame = a52_frame;
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s->a52_block = a52_block;
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s->a52_free = a52_free;
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#endif
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s->state = s->a52_init(0); /* later use CPU flags */
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s->samples = s->a52_samples(s->state);
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/* allow downmixing to stereo or mono */
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if (avctx->channels > 0 && avctx->request_channels > 0 &&
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avctx->request_channels < avctx->channels &&
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avctx->request_channels <= 2) {
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avctx->channels = avctx->request_channels;
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}
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avctx->sample_fmt = SAMPLE_FMT_S16;
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return 0;
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}
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/**** the following function comes from a52dec */
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static inline void float_to_int (float * _f, int16_t * s16, int nchannels)
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{
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int i, j, c;
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int32_t * f = (int32_t *) _f; // XXX assumes IEEE float format
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j = 0;
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nchannels *= 256;
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for (i = 0; i < 256; i++) {
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for (c = 0; c < nchannels; c += 256)
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s16[j++] = av_clip_int16(f[i + c] - 0x43c00000);
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}
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}
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/**** end */
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#define HEADER_SIZE 7
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static int a52_decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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uint8_t *buf, int buf_size)
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{
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AC3DecodeState *s = avctx->priv_data;
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int flags, i, len;
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int sample_rate, bit_rate;
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short *out_samples = data;
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float level;
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static const int ac3_channels[8] = {
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2, 1, 2, 3, 3, 4, 4, 5
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};
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*data_size= 0;
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if (buf_size < HEADER_SIZE) {
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av_log(avctx, AV_LOG_ERROR, "Error decoding frame, not enough bytes for header\n");
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return -1;
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}
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len = s->a52_syncinfo(buf, &s->flags, &sample_rate, &bit_rate);
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if (len == 0) {
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av_log(avctx, AV_LOG_ERROR, "Error decoding frame, no sync byte at begin\n");
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return -1;
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}
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if (buf_size < len) {
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av_log(avctx, AV_LOG_ERROR, "Error decoding frame, not enough bytes\n");
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return -1;
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}
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/* update codec info */
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avctx->sample_rate = sample_rate;
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s->channels = ac3_channels[s->flags & 7];
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if (s->flags & A52_LFE)
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s->channels++;
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if (avctx->request_channels > 0 &&
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avctx->request_channels <= 2 &&
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avctx->request_channels < s->channels) {
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avctx->channels = avctx->request_channels;
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} else {
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avctx->channels = s->channels;
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}
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avctx->bit_rate = bit_rate;
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flags = s->flags;
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if (avctx->channels == 1)
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flags = A52_MONO;
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else if (avctx->channels == 2)
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flags = A52_STEREO;
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else
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flags |= A52_ADJUST_LEVEL;
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level = 1;
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if (s->a52_frame(s->state, buf, &flags, &level, 384)) {
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fail:
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av_log(avctx, AV_LOG_ERROR, "Error decoding frame\n");
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return -1;
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}
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for (i = 0; i < 6; i++) {
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if (s->a52_block(s->state))
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goto fail;
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float_to_int(s->samples, out_samples + i * 256 * avctx->channels, avctx->channels);
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}
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*data_size = 6 * avctx->channels * 256 * sizeof(int16_t);
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return len;
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}
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static av_cold int a52_decode_end(AVCodecContext *avctx)
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{
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AC3DecodeState *s = avctx->priv_data;
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s->a52_free(s->state);
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#ifdef CONFIG_LIBA52BIN
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dlclose(s->handle);
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#endif
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return 0;
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}
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AVCodec liba52_decoder = {
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"liba52",
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CODEC_TYPE_AUDIO,
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CODEC_ID_AC3,
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sizeof(AC3DecodeState),
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a52_decode_init,
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NULL,
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a52_decode_end,
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a52_decode_frame,
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.long_name = NULL_IF_CONFIG_SMALL("liba52 ATSC A/52 / AC-3"),
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};
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