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author | Dave Chapman <dave@dchapman.com> | 2005-10-29 17:12:52 +0000 |
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committer | Dave Chapman <dave@dchapman.com> | 2005-10-29 17:12:52 +0000 |
commit | 45f9e5d7b02ce3b9d165f45d63825d50244634d4 (patch) | |
tree | 900097f56dbecc41ea4fc6cd50366f0af3164e84 /apps/codecs/libalac/demux.c | |
parent | e75cbdd2a84904e9294091c0ae599762b067077a (diff) | |
download | rockbox-45f9e5d7b02ce3b9d165f45d63825d50244634d4.tar.gz rockbox-45f9e5d7b02ce3b9d165f45d63825d50244634d4.zip |
Remove generic M4A parsing code from libalac and create a libm4a - so it can be used by other codecs
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7682 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/libalac/demux.c')
-rw-r--r-- | apps/codecs/libalac/demux.c | 656 |
1 files changed, 0 insertions, 656 deletions
diff --git a/apps/codecs/libalac/demux.c b/apps/codecs/libalac/demux.c deleted file mode 100644 index 80963a2fce..0000000000 --- a/apps/codecs/libalac/demux.c +++ /dev/null @@ -1,656 +0,0 @@ -/* - * ALAC (Apple Lossless Audio Codec) decoder - * Copyright (c) 2005 David Hammerton - * All rights reserved. - * - * This is the quicktime container demuxer. - * - * http://crazney.net/programs/itunes/alac.html - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - */ - - -#include <string.h> -#include <stdio.h> -#include <inttypes.h> -#include <stdlib.h> - -#include "../codec.h" - -#include "stream.h" -#include "demux.h" - -typedef struct -{ - stream_t *stream; - demux_res_t *res; -} qtmovie_t; - - -/* chunk handlers */ -static void read_chunk_ftyp(qtmovie_t *qtmovie, size_t chunk_len) -{ - fourcc_t type; - uint32_t minor_ver; - size_t size_remaining = chunk_len - 8; /* FIXME: can't hardcode 8, size may be 64bit */ - - type = stream_read_uint32(qtmovie->stream); - size_remaining-=4; - if (type != MAKEFOURCC('M','4','A',' ')) - { - //fprintf(stderr, "not M4A file\n"); - return; - } - minor_ver = stream_read_uint32(qtmovie->stream); - size_remaining-=4; - - /* compatible brands */ - while (size_remaining) - { - /* unused */ - /*fourcc_t cbrand =*/ stream_read_uint32(qtmovie->stream); - size_remaining-=4; - } -} - -static void read_chunk_tkhd(qtmovie_t *qtmovie, size_t chunk_len) -{ - /* don't need anything from here atm, skip */ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - stream_skip(qtmovie->stream, size_remaining); -} - -static void read_chunk_mdhd(qtmovie_t *qtmovie, size_t chunk_len) -{ - /* don't need anything from here atm, skip */ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - stream_skip(qtmovie->stream, size_remaining); -} - -/* media handler inside mdia */ -static void read_chunk_hdlr(qtmovie_t *qtmovie, size_t chunk_len) -{ - fourcc_t comptype, compsubtype; - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - int strlen; - char str[256] = {0}; - - /* version */ - stream_read_uint8(qtmovie->stream); - size_remaining -= 1; - /* flags */ - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - size_remaining -= 3; - - /* component type */ - comptype = stream_read_uint32(qtmovie->stream); - compsubtype = stream_read_uint32(qtmovie->stream); - size_remaining -= 8; - - /* component manufacturer */ - stream_read_uint32(qtmovie->stream); - size_remaining -= 4; - - /* flags */ - stream_read_uint32(qtmovie->stream); - stream_read_uint32(qtmovie->stream); - size_remaining -= 8; - - /* name */ - strlen = stream_read_uint8(qtmovie->stream); - stream_read(qtmovie->stream, strlen, str); - size_remaining -= 1 + strlen; - - if (size_remaining) - { - stream_skip(qtmovie->stream, size_remaining); - } - -} - -static bool read_chunk_stsd(qtmovie_t *qtmovie, size_t chunk_len) -{ - unsigned int i; - uint32_t numentries; - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - /* version */ - stream_read_uint8(qtmovie->stream); - size_remaining -= 1; - /* flags */ - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - size_remaining -= 3; - - numentries = stream_read_uint32(qtmovie->stream); - size_remaining -= 4; - - if (numentries != 1) - { - //fprintf(stderr, "only expecting one entry in sample description atom!\n"); - return false; - } - - for (i = 0; i < numentries; i++) - { - uint32_t entry_size; - uint16_t version; - - uint32_t entry_remaining; - - entry_size = stream_read_uint32(qtmovie->stream); - qtmovie->res->format = stream_read_uint32(qtmovie->stream); - entry_remaining = entry_size; - entry_remaining -= 8; - - /* sound info: */ - - stream_skip(qtmovie->stream, 6); /* reserved */ - entry_remaining -= 6; - - version = stream_read_uint16(qtmovie->stream); - // if (version != 1) - //fprintf(stderr, "unknown version??\n"); - entry_remaining -= 2; - - /* revision level */ - stream_read_uint16(qtmovie->stream); - /* vendor */ - stream_read_uint32(qtmovie->stream); - entry_remaining -= 6; - - /* EH?? spec doesn't say theres an extra 16 bits here.. but there is! */ - stream_read_uint16(qtmovie->stream); - entry_remaining -= 2; - - qtmovie->res->num_channels = stream_read_uint16(qtmovie->stream); - - qtmovie->res->sample_size = stream_read_uint16(qtmovie->stream); - entry_remaining -= 4; - - /* compression id */ - stream_read_uint16(qtmovie->stream); - /* packet size */ - stream_read_uint16(qtmovie->stream); - entry_remaining -= 4; - - /* sample rate - 32bit fixed point = 16bit?? */ - qtmovie->res->sample_rate = stream_read_uint16(qtmovie->stream); - entry_remaining -= 2; - - /* skip 2 */ - stream_skip(qtmovie->stream, 2); - entry_remaining -= 2; - - /* remaining is codec data */ - -#if 0 - qtmovie->res->codecdata_len = stream_read_uint32(qtmovie->stream); - if (qtmovie->res->codecdata_len != entry_remaining) - fprintf(stderr, "perhaps not? %i vs %i\n", - qtmovie->res->codecdata_len, entry_remaining); - entry_remaining -= 4; - stream_read_uint32(qtmovie->stream); /* 'alac' */ - entry_remaining -= 4; - - qtmovie->res->codecdata = malloc(qtmovie->res->codecdata_len - 8); - - stream_read(qtmovie->stream, - entry_remaining, - qtmovie->res->codecdata); - entry_remaining = 0; - -#else - /* 12 = audio format atom, 8 = padding */ - qtmovie->res->codecdata_len = entry_remaining + 12 + 8; - qtmovie->res->codecdata = malloc(qtmovie->res->codecdata_len); - memset(qtmovie->res->codecdata, 0, qtmovie->res->codecdata_len); - /* audio format atom */ - ((unsigned int*)qtmovie->res->codecdata)[0] = 0x0c000000; - ((unsigned int*)qtmovie->res->codecdata)[1] = MAKEFOURCC('a','m','r','f'); - ((unsigned int*)qtmovie->res->codecdata)[2] = MAKEFOURCC('c','a','l','a'); - - stream_read(qtmovie->stream, - entry_remaining, - ((char*)qtmovie->res->codecdata) + 12); - entry_remaining -= entry_remaining; - -#endif - if (entry_remaining) - stream_skip(qtmovie->stream, entry_remaining); - - if (qtmovie->res->format != MAKEFOURCC('a','l','a','c')) - { -// fprintf(stderr, "expecting 'alac' data format, got %c%c%c%c\n", -// SPLITFOURCC(qtmovie->res->format)); - return false; - } - } - return true; -} - -static void read_chunk_stts(qtmovie_t *qtmovie, size_t chunk_len) -{ - unsigned int i; - uint32_t numentries; - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - /* version */ - stream_read_uint8(qtmovie->stream); - size_remaining -= 1; - /* flags */ - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - size_remaining -= 3; - - numentries = stream_read_uint32(qtmovie->stream); - size_remaining -= 4; - - qtmovie->res->num_time_to_samples = numentries; - qtmovie->res->time_to_sample = malloc(numentries * sizeof(*qtmovie->res->time_to_sample)); - - for (i = 0; i < numentries; i++) - { - qtmovie->res->time_to_sample[i].sample_count = stream_read_uint32(qtmovie->stream); - qtmovie->res->time_to_sample[i].sample_duration = stream_read_uint32(qtmovie->stream); - size_remaining -= 8; - } - - if (size_remaining) - { - //fprintf(stderr, "ehm, size remianing?\n"); - stream_skip(qtmovie->stream, size_remaining); - } -} - -static void read_chunk_stsz(qtmovie_t *qtmovie, size_t chunk_len) -{ - unsigned int i; - uint32_t numentries; - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - /* version */ - stream_read_uint8(qtmovie->stream); - size_remaining -= 1; - /* flags */ - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - stream_read_uint8(qtmovie->stream); - size_remaining -= 3; - - /* default sample size */ - if (stream_read_uint32(qtmovie->stream) != 0) - { - //fprintf(stderr, "i was expecting variable samples sizes\n"); - stream_read_uint32(qtmovie->stream); - size_remaining -= 4; - return; - } - size_remaining -= 4; - - numentries = stream_read_uint32(qtmovie->stream); - size_remaining -= 4; - - qtmovie->res->num_sample_byte_sizes = numentries; - qtmovie->res->sample_byte_size = malloc(numentries * sizeof(*qtmovie->res->sample_byte_size)); - - for (i = 0; i < numentries; i++) - { - qtmovie->res->sample_byte_size[i] = stream_read_uint32(qtmovie->stream); - size_remaining -= 4; - } - - if (size_remaining) - { - //fprintf(stderr, "ehm, size remianing?\n"); - stream_skip(qtmovie->stream, size_remaining); - } -} - -static bool read_chunk_stbl(qtmovie_t *qtmovie, size_t chunk_len) -{ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - while (size_remaining) - { - size_t sub_chunk_len; - fourcc_t sub_chunk_id; - - sub_chunk_len = stream_read_uint32(qtmovie->stream); - if (sub_chunk_len <= 1 || sub_chunk_len > size_remaining) - { - //fprintf(stderr, "strange size for chunk inside stbl\n"); - return false; - } - - sub_chunk_id = stream_read_uint32(qtmovie->stream); - - switch (sub_chunk_id) - { - case MAKEFOURCC('s','t','s','d'): - if (!read_chunk_stsd(qtmovie, sub_chunk_len)) { - return false; - } - break; - case MAKEFOURCC('s','t','t','s'): - read_chunk_stts(qtmovie, sub_chunk_len); - break; - case MAKEFOURCC('s','t','s','z'): - read_chunk_stsz(qtmovie, sub_chunk_len); - break; - case MAKEFOURCC('s','t','s','c'): - case MAKEFOURCC('s','t','c','o'): - /* skip these, no indexing for us! */ - stream_skip(qtmovie->stream, sub_chunk_len - 8); - break; - default: -// fprintf(stderr, "(stbl) unknown chunk id: %c%c%c%c\n", -// SPLITFOURCC(sub_chunk_id)); - return false; - } - - size_remaining -= sub_chunk_len; - } - return true; -} - -static bool read_chunk_minf(qtmovie_t *qtmovie, size_t chunk_len) -{ - size_t dinf_size, stbl_size; - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - /**** SOUND HEADER CHUNK ****/ - if (stream_read_uint32(qtmovie->stream) != 16) - { - //fprintf(stderr, "unexpected size in media info\n"); - return false; - } - if (stream_read_uint32(qtmovie->stream) != MAKEFOURCC('s','m','h','d')) - { - //fprintf(stderr, "not a sound header! can't handle this.\n"); - return false; - } - /* now skip the rest */ - stream_skip(qtmovie->stream, 16 - 8); - size_remaining -= 16; - /****/ - - /**** DINF CHUNK ****/ - dinf_size = stream_read_uint32(qtmovie->stream); - if (stream_read_uint32(qtmovie->stream) != MAKEFOURCC('d','i','n','f')) - { - //fprintf(stderr, "expected dinf, didn't get it.\n"); - return false; - } - /* skip it */ - stream_skip(qtmovie->stream, dinf_size - 8); - size_remaining -= dinf_size; - /****/ - - - /**** SAMPLE TABLE ****/ - stbl_size = stream_read_uint32(qtmovie->stream); - if (stream_read_uint32(qtmovie->stream) != MAKEFOURCC('s','t','b','l')) - { - //fprintf(stderr, "expected stbl, didn't get it.\n"); - return false; - } - if (!read_chunk_stbl(qtmovie, stbl_size)) { - return false; - } - - size_remaining -= stbl_size; - - if (size_remaining) - { - //fprintf(stderr, "oops\n"); - stream_skip(qtmovie->stream, size_remaining); - } - return true; -} - -static bool read_chunk_mdia(qtmovie_t *qtmovie, size_t chunk_len) -{ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - while (size_remaining) - { - size_t sub_chunk_len; - fourcc_t sub_chunk_id; - - sub_chunk_len = stream_read_uint32(qtmovie->stream); - if (sub_chunk_len <= 1 || sub_chunk_len > size_remaining) - { - //fprintf(stderr, "strange size for chunk inside mdia\n"); - return false; - } - - sub_chunk_id = stream_read_uint32(qtmovie->stream); - - switch (sub_chunk_id) - { - case MAKEFOURCC('m','d','h','d'): - read_chunk_mdhd(qtmovie, sub_chunk_len); - break; - case MAKEFOURCC('h','d','l','r'): - read_chunk_hdlr(qtmovie, sub_chunk_len); - break; - case MAKEFOURCC('m','i','n','f'): - if (!read_chunk_minf(qtmovie, sub_chunk_len)) { - return false; - } - break; - default: -// fprintf(stderr, "(mdia) unknown chunk id: %c%c%c%c\n", -// SPLITFOURCC(sub_chunk_id)); - return false; - } - - size_remaining -= sub_chunk_len; - } - return true; -} - -/* 'trak' - a movie track - contains other atoms */ -static bool read_chunk_trak(qtmovie_t *qtmovie, size_t chunk_len) -{ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - while (size_remaining) - { - size_t sub_chunk_len; - fourcc_t sub_chunk_id; - - sub_chunk_len = stream_read_uint32(qtmovie->stream); - if (sub_chunk_len <= 1 || sub_chunk_len > size_remaining) - { - //fprintf(stderr, "strange size for chunk inside trak\n"); - return false; - } - - sub_chunk_id = stream_read_uint32(qtmovie->stream); - - switch (sub_chunk_id) - { - case MAKEFOURCC('t','k','h','d'): - read_chunk_tkhd(qtmovie, sub_chunk_len); - break; - case MAKEFOURCC('m','d','i','a'): - if (!read_chunk_mdia(qtmovie, sub_chunk_len)) { - return false; - } - break; - default: -// fprintf(stderr, "(trak) unknown chunk id: %c%c%c%c\n", -// SPLITFOURCC(sub_chunk_id)); - stream_skip(qtmovie->stream, sub_chunk_len - 8); - break; - } - - size_remaining -= sub_chunk_len; - } - return true; -} - -/* 'mvhd' movie header atom */ -static void read_chunk_mvhd(qtmovie_t *qtmovie, size_t chunk_len) -{ - /* don't need anything from here atm, skip */ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - stream_skip(qtmovie->stream, size_remaining); -} - -/* 'udta' user data.. contains tag info */ -static void read_chunk_udta(qtmovie_t *qtmovie, size_t chunk_len) -{ - /* don't need anything from here atm, skip */ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - stream_skip(qtmovie->stream, size_remaining); -} - -/* 'moov' movie atom - contains other atoms */ -static bool read_chunk_moov(qtmovie_t *qtmovie, size_t chunk_len) -{ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - while (size_remaining) - { - size_t sub_chunk_len; - fourcc_t sub_chunk_id; - - sub_chunk_len = stream_read_uint32(qtmovie->stream); - if (sub_chunk_len <= 1 || sub_chunk_len > size_remaining) - { - //fprintf(stderr, "strange size for chunk inside moov\n"); - return false; - } - - sub_chunk_id = stream_read_uint32(qtmovie->stream); - - switch (sub_chunk_id) - { - case MAKEFOURCC('m','v','h','d'): - read_chunk_mvhd(qtmovie, sub_chunk_len); - break; - case MAKEFOURCC('t','r','a','k'): - if (!read_chunk_trak(qtmovie, sub_chunk_len)) { - return false; - } - break; - case MAKEFOURCC('u','d','t','a'): - read_chunk_udta(qtmovie, sub_chunk_len); - break; - default: -// fprintf(stderr, "(moov) unknown chunk id: %c%c%c%c\n", -// SPLITFOURCC(sub_chunk_id)); - return false; - } - - size_remaining -= sub_chunk_len; - } - return true; -} - -static void read_chunk_mdat(qtmovie_t *qtmovie, size_t chunk_len) -{ - size_t size_remaining = chunk_len - 8; /* FIXME WRONG */ - - qtmovie->res->mdat_len = size_remaining; -#if 0 - qtmovie->res->mdat = malloc(size_remaining); - - stream_read(qtmovie->stream, size_remaining, qtmovie->res->mdat); -#endif -} - -int qtmovie_read(stream_t *file, demux_res_t *demux_res) -{ - qtmovie_t qtmovie; - - /* construct the stream */ - qtmovie.stream = file; - qtmovie.res = demux_res; - - /* read the chunks */ - while (1) - { - size_t chunk_len; - fourcc_t chunk_id; - - chunk_len = stream_read_uint32(qtmovie.stream); - if (stream_eof(qtmovie.stream)) - { - return 0; - } - - if (chunk_len == 1) - { - //fprintf(stderr, "need 64bit support\n"); - return 0; - } - chunk_id = stream_read_uint32(qtmovie.stream); - - switch (chunk_id) - { - case MAKEFOURCC('f','t','y','p'): - read_chunk_ftyp(&qtmovie, chunk_len); - break; - case MAKEFOURCC('m','o','o','v'): - if (!read_chunk_moov(&qtmovie, chunk_len)) { - return 0; - } - break; - /* once we hit mdat we stop reading and return. - * this is on the assumption that there is no furhter interesting - * stuff in the stream. if there is stuff will fail (:()). - * But we need the read pointer to be at the mdat stuff - * for the decoder. And we don't want to rely on fseek/ftell, - * as they may not always be avilable */ - case MAKEFOURCC('m','d','a','t'): - read_chunk_mdat(&qtmovie, chunk_len); - return 1; - - /* these following atoms can be skipped !!!! */ - case MAKEFOURCC('f','r','e','e'): - stream_skip(qtmovie.stream, chunk_len - 8); /* FIXME not 8 */ - break; - default: -// fprintf(stderr, "(top) unknown chunk id: %c%c%c%c\n", -// SPLITFOURCC(chunk_id)); - return 0; - } - - } - return 0; -} - - |