forked from len0rd/rockbox
First version of ALAC (Apple Lossless) decoder
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7547 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman
parent
8026f0fe05
commit
139c1cb824
7 changed files with 744 additions and 3 deletions
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@ -17,7 +17,7 @@ ifdef APPEXTRA
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endif
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ifdef SOFTWARECODECS
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CODECLIBS = -lmad -la52 -lFLAC -lTremor -lwavpack -lmusepack
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CODECLIBS = -lmad -la52 -lFLAC -lTremor -lwavpack -lmusepack -lalac
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endif
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# we "borrow" the plugin LDS file
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@ -39,7 +39,7 @@ DIRS = .
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CODECDEPS = $(LINKCODEC) $(BUILDDIR)/libcodec.a
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.PHONY: libmad liba52 libFLAC libTremor libwavpack dumb libmusepack
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.PHONY: libmad liba52 libFLAC libTremor libwavpack dumb libmusepack libalac
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OUTPUT = $(SOFTWARECODECS)
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@ -60,6 +60,7 @@ $(OBJDIR)/vorbis.elf: $(OBJDIR)/vorbis.o $(CODECDEPS) $(BUILDDIR)/libTremor.a
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$(OBJDIR)/mpc.elf: $(OBJDIR)/mpc.o $(CODECDEPS) $(BUILDDIR)/libmusepack.a
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$(OBJDIR)/wav.elf: $(OBJDIR)/wav.o $(CODECDEPS)
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$(OBJDIR)/wavpack.elf: $(OBJDIR)/wavpack.o $(CODECDEPS) $(BUILDDIR)/libwavpack.a
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$(OBJDIR)/alac.elf: $(OBJDIR)/alac.o $(CODECDEPS) $(BUILDDIR)/libalac.a
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$(OBJDIR)/%.elf: $(OBJDIR)/%.o $(CODECDEPS)
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$(ELFIT)
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@ -152,14 +153,20 @@ libmusepack:
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@mkdir -p $(OBJDIR)/libmusepack
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@$(MAKE) -C libmusepack OBJDIR=$(OBJDIR)/libmusepack OUTPUT=$(BUILDDIR)/libmusepack.a
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libalac:
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@echo "MAKE in libalac"
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@mkdir -p $(OBJDIR)/libalac
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@$(MAKE) -C libalac OBJDIR=$(OBJDIR)/libalac OUTPUT=$(BUILDDIR)/libalac.a
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clean:
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@echo "cleaning codecs"
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$(SILENT)rm -fr $(OBJDIR)/libmad $(BUILDDIR)/libmad.a $(OBJDIR)/liba52 $(OBJDIR)/libFLAC $(OBJDIR)/Tremor $(OBJDIR)/libwavpack $(OBJDIR)/dumb $(BUILDDIR)/libdumb.a $(BUILDDIR)/libdumbd.a $(OBJDIR)/libmusepack $(BUILDDIR)/libmusepack.a
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$(SILENT)rm -fr $(OBJDIR)/libmad $(BUILDDIR)/libmad.a $(OBJDIR)/liba52 $(OBJDIR)/libFLAC $(OBJDIR)/Tremor $(OBJDIR)/libwavpack $(OBJDIR)/dumb $(BUILDDIR)/libdumb.a $(BUILDDIR)/libdumbd.a $(OBJDIR)/libmusepack $(BUILDDIR)/libmusepack.a $(OBJDIR)/libalac $(BUILDDIR)/libalac.a
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@$(MAKE) -C libmad clean OBJDIR=$(OBJDIR)/libmad
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@$(MAKE) -C liba52 clean OBJDIR=$(OBJDIR)/liba52
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@$(MAKE) -C libFLAC clean OBJDIR=$(OBJDIR)/libFLAC
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@$(MAKE) -C Tremor clean OBJDIR=$(OBJDIR)/Tremor
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@$(MAKE) -C libwavpack clean OBJDIR=$(OBJDIR)/libwavpack
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@$(MAKE) -C libmusepack clean OBJDIR=$(OBJDIR)/libmusepack
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@$(MAKE) -C libalac clean OBJDIR=$(OBJDIR)/libalac
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@$(MAKE) -C dumb clean OBJDIR=$(OBJDIR)/dumb
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@$(MAKE) -C lib clean OBJDIR=$(OBJDIR)/lib
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@ -6,4 +6,5 @@ wav.c
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a52.c
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mpc.c
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wavpack.c
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alac.c
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#endif
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388
apps/codecs/alac.c
Normal file
388
apps/codecs/alac.c
Normal file
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@ -0,0 +1,388 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Dave Chapman
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "codec.h"
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#include <codecs/libalac/demux.h>
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#include <codecs/libalac/decomp.h>
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#include <codecs/libalac/stream.h>
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#include "playback.h"
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#include "dsp.h"
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#include "lib/codeclib.h"
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#ifndef SIMULATOR
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extern char iramcopy[];
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extern char iramstart[];
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extern char iramend[];
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#endif
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#define destBufferSize (1024*16)
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char inputBuffer[1024*32]; /* Input buffer */
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size_t mdat_offset;
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struct codec_api* rb;
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struct codec_api* ci;
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/* Implementation of the stream.h functions used by libalac */
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#define _Swap32(v) do { \
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v = (((v) & 0x000000FF) << 0x18) | \
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(((v) & 0x0000FF00) << 0x08) | \
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(((v) & 0x00FF0000) >> 0x08) | \
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(((v) & 0xFF000000) >> 0x18); } while(0)
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#define _Swap16(v) do { \
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v = (((v) & 0x00FF) << 0x08) | \
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(((v) & 0xFF00) >> 0x08); } while (0)
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/* A normal read without any byte-swapping */
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void stream_read(stream_t *stream, size_t size, void *buf)
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{
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ci->read_filebuf(buf,size);
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if (ci->curpos >= ci->filesize) { stream->eof=1; }
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}
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int32_t stream_read_int32(stream_t *stream)
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{
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int32_t v;
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stream_read(stream, 4, &v);
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#ifdef ROCKBOX_LITTLE_ENDIAN
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_Swap32(v);
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#endif
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return v;
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}
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uint32_t stream_read_uint32(stream_t *stream)
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{
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uint32_t v;
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stream_read(stream, 4, &v);
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#ifdef ROCKBOX_LITTLE_ENDIAN
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_Swap32(v);
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#endif
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return v;
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}
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int16_t stream_read_int16(stream_t *stream)
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{
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int16_t v;
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stream_read(stream, 2, &v);
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#ifdef ROCKBOX_LITTLE_ENDIAN
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_Swap16(v);
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#endif
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return v;
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}
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uint16_t stream_read_uint16(stream_t *stream)
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{
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uint16_t v;
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stream_read(stream, 2, &v);
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#ifdef ROCKBOX_LITTLE_ENDIAN
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_Swap16(v);
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#endif
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return v;
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}
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int8_t stream_read_int8(stream_t *stream)
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{
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int8_t v;
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stream_read(stream, 1, &v);
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return v;
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}
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uint8_t stream_read_uint8(stream_t *stream)
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{
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uint8_t v;
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stream_read(stream, 1, &v);
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return v;
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}
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void stream_skip(stream_t *stream, size_t skip)
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{
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(void)stream;
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ci->advance_buffer(skip);
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}
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int stream_eof(stream_t *stream)
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{
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return stream->eof;
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}
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void stream_create(stream_t *stream)
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{
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stream->eof=0;
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}
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/* This function was part of the original alac decoder implementation */
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static int get_sample_info(demux_res_t *demux_res, uint32_t samplenum,
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uint32_t *sample_duration,
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uint32_t *sample_byte_size)
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{
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unsigned int duration_index_accum = 0;
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unsigned int duration_cur_index = 0;
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if (samplenum >= demux_res->num_sample_byte_sizes) {
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return 0;
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}
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if (!demux_res->num_time_to_samples) {
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return 0;
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}
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while ((demux_res->time_to_sample[duration_cur_index].sample_count
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+ duration_index_accum) <= samplenum) {
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duration_index_accum +=
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demux_res->time_to_sample[duration_cur_index].sample_count;
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duration_cur_index++;
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if (duration_cur_index >= demux_res->num_time_to_samples) {
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return 0;
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}
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}
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*sample_duration =
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demux_res->time_to_sample[duration_cur_index].sample_duration;
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*sample_byte_size = demux_res->sample_byte_size[samplenum];
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return 1;
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}
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/* Seek to sample_loc (or close to it). Return 1 on success (and
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modify samplesdone and currentblock), 0 if failed
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Seeking uses the following two arrays:
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1) the sample_byte_size array contains the length in bytes of
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each block ("sample" in Applespeak).
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2) the time_to_sample array contains the duration (in samples) of
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each block of data.
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So we just find the block number we are going to seek to (using
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time_to_sample) and then find the offset in the file (using
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sample_byte_size).
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Each ALAC block seems to be independent of all the others.
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*/
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static unsigned int alac_seek (demux_res_t* demux_res,
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unsigned int sample_loc,
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size_t* samplesdone, int* currentblock)
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{
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int flag;
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unsigned int i,j;
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unsigned int newblock;
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unsigned int newsample;
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unsigned int newpos;
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/* First check we have the appropriate metadata - we should always
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have it. */
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if ((demux_res->num_time_to_samples==0) ||
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(demux_res->num_sample_byte_sizes==0)) { return 0; }
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/* Find the destination block from time_to_sample array */
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i=0;
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newblock=0;
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newsample=0;
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flag=0;
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while ((i<demux_res->num_time_to_samples) && (flag==0) &&
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(newsample < sample_loc)) {
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j=(sample_loc-newsample) /
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demux_res->time_to_sample[i].sample_duration;
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if (j <= demux_res->time_to_sample[i].sample_count) {
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newblock+=j;
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newsample+=j*demux_res->time_to_sample[i].sample_duration;
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flag=1;
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} else {
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newsample+=(demux_res->time_to_sample[i].sample_duration
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* demux_res->time_to_sample[i].sample_count);
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newblock+=demux_res->time_to_sample[i].sample_count;
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i++;
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}
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}
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/* We know the new block, now calculate the file position */
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newpos=mdat_offset;
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for (i=0;i<newblock;i++) {
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newpos+=demux_res->sample_byte_size[i];
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}
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/* We know the new file position, so let's try to seek to it */
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if (ci->seek_buffer(newpos)) {
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*samplesdone=newsample;
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*currentblock=newblock;
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return 1;
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} else {
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return 0;
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}
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}
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/* this is the codec entry point */
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enum codec_status codec_start(struct codec_api* api)
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{
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size_t n;
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demux_res_t demux_res;
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static stream_t input_stream;
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uint32_t samplesdone;
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uint32_t elapsedtime;
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uint32_t sample_duration;
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uint32_t sample_byte_size;
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int outputBytes;
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unsigned int i;
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unsigned char* buffer;
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alac_file alac;
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int16_t* pDestBuffer;
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/* Generic codec initialisation */
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TEST_CODEC_API(api);
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rb = api;
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ci = (struct codec_api*)api;
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#ifndef SIMULATOR
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rb->memcpy(iramstart, iramcopy, iramend-iramstart);
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#endif
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ci->configure(CODEC_SET_FILEBUF_LIMIT, (int *)(1024*1024*10));
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ci->configure(CODEC_SET_FILEBUF_WATERMARK, (int *)(1024*512));
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ci->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (int *)(1024*128));
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ci->configure(DSP_DITHER, (bool *)false);
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ci->configure(DSP_SET_STEREO_MODE, (int *)STEREO_INTERLEAVED);
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ci->configure(DSP_SET_SAMPLE_DEPTH, (int *)(16));
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next_track:
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if (codec_init(api)) {
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LOGF("ALAC: Error initialising codec\n");
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return CODEC_ERROR;
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}
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while (!rb->taginfo_ready)
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rb->yield();
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if (rb->id3->frequency != NATIVE_FREQUENCY) {
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rb->configure(DSP_SET_FREQUENCY, (long *)(rb->id3->frequency));
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rb->configure(CODEC_DSP_ENABLE, (bool *)true);
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} else {
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rb->configure(CODEC_DSP_ENABLE, (bool *)false);
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}
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stream_create(&input_stream);
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/* if qtmovie_read returns successfully, the stream is up to
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* the movie data, which can be used directly by the decoder */
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if (!qtmovie_read(&input_stream, &demux_res)) {
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LOGF("ALAC: Error initialising file\n");
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return CODEC_ERROR;
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}
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/* Keep track of start of stream in file - used for seeking */
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mdat_offset=ci->curpos;
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/* initialise the sound converter */
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create_alac(demux_res.sample_size, demux_res.num_channels,&alac);
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alac_set_info(&alac, demux_res.codecdata);
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i=0;
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samplesdone=0;
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/* The main decoding loop */
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while (i < demux_res.num_sample_byte_sizes) {
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rb->yield();
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if (ci->stop_codec || ci->reload_codec) {
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break;
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}
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/* Deal with any pending seek requests */
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if (ci->seek_time) {
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if (alac_seek(&demux_res,
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(ci->seek_time/10) * (ci->id3->frequency/100),
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&samplesdone, &i)) {
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elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
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ci->set_elapsed(elapsedtime);
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}
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ci->seek_time = 0;
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}
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/* Lookup the length (in samples and bytes) of block i */
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if (!get_sample_info(&demux_res, i, &sample_duration,
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&sample_byte_size)) {
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LOGF("ALAC: Error in get_sample_info\n");
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return CODEC_ERROR;
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}
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/* Request the required number of bytes from the input buffer */
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buffer=ci->request_buffer(&n,sample_byte_size);
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if (n!=sample_byte_size) {
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/* The decode_frame function requires the whole frame, so if we
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can't get it contiguously from the buffer, then we need to
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copy it via a read - i.e. we are at the buffer wraparound
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point */
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/* Check we estimated the maximum buffer size correctly */
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if (sample_byte_size > sizeof(inputBuffer)) {
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LOGF("ALAC: Input buffer < %d bytes\n",sample_byte_size);
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return CODEC_ERROR;
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}
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n=ci->read_filebuf(inputBuffer,sample_byte_size);
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if (n!=sample_byte_size) {
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LOGF("ALAC: Error reading data\n");
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return CODEC_ERROR;
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}
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buffer=inputBuffer;
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}
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/* Decode one block - returned samples will be host-endian */
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outputBytes = destBufferSize;
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rb->yield();
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pDestBuffer=decode_frame(&alac, buffer, &outputBytes);
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/* Advance codec buffer - unless we did a read */
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if ((char*)buffer!=(char*)inputBuffer) {
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ci->advance_buffer(n);
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}
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/* Output the audio */
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rb->yield();
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while(!ci->pcmbuf_insert((char*)pDestBuffer,outputBytes))
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rb->yield();
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/* Update the elapsed-time indicator */
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samplesdone+=sample_duration;
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elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
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ci->set_elapsed(elapsedtime);
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/* Keep track of current position - for resuming */
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ci->set_offset(elapsedtime);
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i++;
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}
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LOGF("ALAC: Decoded %d samples\n",samplesdone);
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if (ci->request_next_track())
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goto next_track;
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return CODEC_OK;
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}
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