From 1c108df4ee230acde7f992ee4cff9b170b8299a9 Mon Sep 17 00:00:00 2001 From: Adam Gashlin Date: Wed, 7 Nov 2007 19:01:58 +0000 Subject: Revert to old ADX codec, works around broken bacwards seek git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15518 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/adx.c | 106 +++++++++++++++++++++++++++--------------------------- 1 file changed, 52 insertions(+), 54 deletions(-) (limited to 'apps/codecs/adx.c') diff --git a/apps/codecs/adx.c b/apps/codecs/adx.c index f558bae135..715df579d7 100644 --- a/apps/codecs/adx.c +++ b/apps/codecs/adx.c @@ -6,7 +6,7 @@ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * - * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * Copyright (C) 2006 Adam Gashlin (hcs) * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. @@ -15,6 +15,7 @@ * KIND, either express or implied. * ****************************************************************************/ + #include "codeclib.h" #include "inttypes.h" @@ -41,7 +42,7 @@ enum codec_status codec_main(void) int sampleswritten, i; uint8_t *buf; int32_t ch1_1, ch1_2, ch2_1, ch2_2; /* ADPCM history */ - size_t n; + size_t n, bufsize; int endofstream; /* end of stream flag */ uint32_t avgbytespersec; int looping; /* looping flag */ @@ -71,15 +72,17 @@ next_track: codec_set_replaygain(ci->id3); - /* Get header */ + /* Read the entire file (or as much as possible) */ DEBUGF("ADX: request initial buffer\n"); + ci->configure(CODEC_SET_FILEBUF_WATERMARK, ci->filesize); ci->seek_buffer(0); - buf = ci->request_buffer(&n, 0x38); + buf = ci->request_buffer(&n, ci->filesize); if (!buf || n < 0x38) { return CODEC_ERROR; } + bufsize = n; bufoff = 0; - DEBUGF("ADX: read size = %lx\n",(unsigned long)n); + DEBUGF("ADX: read size = %lx\n",(unsigned long)bufsize); /* Get file header for starting offset, channel count */ @@ -148,13 +151,10 @@ next_track: } /* advance to first frame */ + /*ci->seek_buffer(chanstart);*/ DEBUGF("ADX: first frame at %lx\n",chanstart); bufoff = chanstart; - /* get in position */ - ci->seek_buffer(bufoff); - - /* setup pcm buffer format */ ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); if (channels == 2) { @@ -180,7 +180,7 @@ next_track: } /* do we need to loop? */ - if (bufoff > end_adr-18*channels && looping) { + if (bufoff >= end_adr-18*channels && looping) { DEBUGF("ADX: loop!\n"); /* check for endless looping */ if (ci->global_settings->repeat_mode==REPEAT_ONE) { @@ -198,7 +198,6 @@ next_track: } } bufoff = start_adr; - ci->seek_buffer(bufoff); } /* do we need to seek? */ @@ -219,40 +218,55 @@ next_track: bufoff-=end_adr-start_adr; loop_count++; } - ci->seek_buffer(bufoff); ci->seek_complete(); } if (bufoff>ci->filesize-channels*18) break; /* End of stream */ + /* dance with the devil in the pale moonlight */ + if ((bufoff > ci->curpos + (off_t)bufsize - channels*18) || + bufoff < ci->curpos) { + DEBUGF("ADX: requesting another buffer at %lx size %lx\n", + bufoff,ci->filesize-bufoff); + ci->seek_buffer(bufoff); + buf = ci->request_buffer(&n, ci->filesize-bufoff); + bufsize = n; + DEBUGF("ADX: read size = %lx\n",(unsigned long)bufsize); + if ((off_t)bufsize < channels*18) { + /* if we can't get a full frame, just request a single + frame (should be able to fit it in the guard buffer) */ + DEBUGF("ADX: requesting single frame at %lx\n",bufoff); + buf = ci->request_buffer(&n, channels*18); + bufsize=n; + DEBUGF("ADX: read size = %lx\n",(unsigned long)bufsize); + } + if (!buf) { + DEBUGF("ADX: couldn't get buffer at %lx size %lx\n", + bufoff,ci->filesize-bufoff); + return CODEC_ERROR; + } + buf-=bufoff; + } + + if (bufsize == 0) break; /* End of stream */ + sampleswritten=0; while ( - /* Is there data left in the file? */ - (bufoff <= ci->filesize-(18*channels)) && - /* Is there space in the output buffer? */ - (sampleswritten <= WAV_CHUNK_SIZE-(32*channels)) && - /* Should we be looping? */ - ((!looping) || bufoff <= end_adr-18*channels)) - { - /* decode first/only channel */ - int32_t scale; + /* Is there data in the file buffer? */ + ((size_t)bufoff <= ci->curpos+bufsize-(18*channels)) && + /* Is there space in the output buffer? */ + (sampleswritten <= WAV_CHUNK_SIZE-(32*channels)) && + /* Should we be looping? */ + ((!looping) || bufoff < end_adr-18*channels)) { + /* decode 18 bytes to 32 samples (from bero) */ + int32_t scale = ((buf[bufoff] << 8) | (buf[bufoff+1])) * BASE_VOL; + int32_t ch1_0, d; - /* fetch a frame */ - buf = ci->request_buffer(&n, 18); - - if (!buf || n!=18) { - DEBUGF("ADX: couldn't get buffer at %lx\n", - bufoff); - return CODEC_ERROR; - } - - scale = (((buf[0] << 8) | (buf[1])) +1) * BASE_VOL; - for (i = 2; i < 18; i++) { - d = (buf[i] >> 4) & 15; + d = (buf[bufoff+i] >> 4) & 15; if (d & 8) d-= 16; ch1_0 = (d*scale + 0x7298L*ch1_1 - 0x3350L*ch1_2) >> 14; if (ch1_0 > 32767) ch1_0 = 32767; @@ -260,8 +274,7 @@ next_track: samples[sampleswritten] = ch1_0; sampleswritten+=channels; ch1_2 = ch1_1; ch1_1 = ch1_0; - - d = buf[i] & 15; + d = buf[bufoff+i] & 15; if (d & 8) d -= 16; ch1_0 = (d*scale + 0x7298L*ch1_1 - 0x3350L*ch1_2) >> 14; if (ch1_0 > 32767) ch1_0 = 32767; @@ -271,28 +284,16 @@ next_track: ch1_2 = ch1_1; ch1_1 = ch1_0; } bufoff+=18; - ci->advance_buffer(18); if (channels == 2) { - /* decode second channel */ - int32_t scale; - int32_t ch2_0, d; - - buf = ci->request_buffer(&n, 18); - - if (!buf || n!=18) { - DEBUGF("ADX: couldn't get buffer at %lx\n", - bufoff); - return CODEC_ERROR; - } - - scale = (((buf[0] << 8)|(buf[1]))+1)*BASE_VOL; + int32_t scale = ((buf[bufoff] << 8)|(buf[bufoff+1]))*BASE_VOL; + int32_t ch2_0, d; sampleswritten-=63; for (i = 2; i < 18; i++) { - d = (buf[i] >> 4) & 15; + d = (buf[bufoff+i] >> 4) & 15; if (d & 8) d-= 16; ch2_0 = (d*scale + 0x7298L*ch2_1 - 0x3350L*ch2_2) >> 14; if (ch2_0 > 32767) ch2_0 = 32767; @@ -300,8 +301,7 @@ next_track: samples[sampleswritten] = ch2_0; sampleswritten+=2; ch2_2 = ch2_1; ch2_1 = ch2_0; - - d = buf[i] & 15; + d = buf[bufoff+i] & 15; if (d & 8) d -= 16; ch2_0 = (d*scale + 0x7298L*ch2_1 - 0x3350L*ch2_2) >> 14; if (ch2_0 > 32767) ch2_0 = 32767; @@ -311,10 +311,8 @@ next_track: ch2_2 = ch2_1; ch2_1 = ch2_0; } bufoff+=18; - ci->advance_buffer(18); sampleswritten--; /* go back to first channel's next sample */ } - if (fade_count>0) { fade_count--; for (i=0;i<(channels==1?32:64);i++) samples[sampleswritten-i-1]= -- cgit v1.2.3