6c868dd48f
Just use long so the compiler potentially doesn't complain about use of other values not in the enum. It's also the type used around the system for event ids. Increase min codec API version. No functional changes. Change-Id: If4419b42912f5e4ef673adcdeb69313e503f94cc
265 lines
8.4 KiB
C
265 lines
8.4 KiB
C
/***************************************************************************
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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) 2006 Antonius Hellmann
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* Copyright (C) 2006-2013 Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 <inttypes.h>
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#include <stdio.h>
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#include "codeclib.h"
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CODEC_ENC_HEADER
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struct aiff_header
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{
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uint8_t form_id[4]; /* 00h - 'FORM' */
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uint32_t form_size; /* 04h - size of file - 8 */
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uint8_t aiff_id[4]; /* 08h - 'AIFF' */
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uint8_t comm_id[4]; /* 0Ch - 'COMM' */
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int32_t comm_size; /* 10h - num_channels through sample_rate
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(18) */
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int16_t num_channels; /* 14h - 1=M, 2=S, etc. */
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uint32_t num_sample_frames; /* 16h - num samples for each channel */
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int16_t sample_size; /* 1ah - 1-32 bits per sample */
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uint8_t sample_rate[10]; /* 1ch - IEEE 754 80-bit floating point */
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uint8_t ssnd_id[4]; /* 26h - "SSND" */
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int32_t ssnd_size; /* 2ah - size of chunk from offset to
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end of pcm data */
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uint32_t offset; /* 2eh - data offset from end of header */
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uint32_t block_size; /* 32h - pcm data alignment */
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/* 36h */
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} __attribute__((packed));
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#define PCM_DEPTH_BYTES 2
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#define PCM_DEPTH_BITS 16
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#define PCM_SAMP_PER_CHUNK 2048
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static int num_channels;
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static uint32_t sample_rate;
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static size_t frame_size;
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static size_t pcm_size;
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static uint32_t num_sample_frames;
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/* Template headers */
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static const struct aiff_header aiff_template_header =
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{
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{ 'F', 'O', 'R', 'M' }, /* form_id */
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0, /* form_size (*) */
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{ 'A', 'I', 'F', 'F' }, /* aiff_id */
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{ 'C', 'O', 'M', 'M' }, /* comm_id */
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htobe32(18), /* comm_size */
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0, /* num_channels (*) */
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0, /* num_sample_frames (*) */
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htobe16(PCM_DEPTH_BITS), /* sample_size */
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* sample_rate (*) */
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{ 'S', 'S', 'N', 'D' }, /* ssnd_id */
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0, /* ssnd_size (*) */
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htobe32(0), /* offset */
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htobe32(0), /* block_size */
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/* (*) updated when finalizing stream */
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};
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static inline void frame_htobe(uint32_t *p, size_t size)
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{
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#ifdef ROCKBOX_LITTLE_ENDIAN
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/* Byte-swap samples, stereo or mono */
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do
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{
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uint32_t t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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t = swap_odd_even32(*p); *p++ = t;
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}
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while (size -= 8 * 2 * PCM_DEPTH_BYTES);
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#endif /* ROCKBOX_LITTLE_ENDIAN */
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(void)p; (void)size;
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}
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/* convert unsigned 32 bit value to 80-bit floating point number */
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static void uint32_h_to_ieee754_extended_be(uint8_t f[10], uint32_t l)
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{
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ci->memset(f, 0, 10);
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if (l == 0)
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return;
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int shift = __builtin_clz(l);
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/* sign always zero - bit 79 */
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/* exponent is 0-31 (normalized: 30 - shift + 16383) - bits 64-78 */
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f[0] = 0x40;
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f[1] = (uint8_t)(30 - shift);
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/* mantissa is value left justified with most significant non-zero
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bit stored in bit 63 - bits 0-63 */
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l <<= shift;
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f[2] = (uint8_t)(l >> 24);
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f[3] = (uint8_t)(l >> 16);
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f[4] = (uint8_t)(l >> 8);
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f[5] = (uint8_t)(l >> 0);
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}
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static int on_stream_data(struct enc_chunk_data *data)
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{
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size_t size = data->hdr.size;
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if (ci->enc_stream_write(data->data, size) != (ssize_t)size)
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return -1;
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pcm_size += size;
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num_sample_frames += data->pcm_count;
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return 0;
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}
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static int on_stream_start(void)
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{
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/* reset sample count */
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pcm_size = 0;
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num_sample_frames = 0;
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/* write template header */
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if (ci->enc_stream_write(&aiff_template_header,
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sizeof (struct aiff_header))
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!= sizeof (struct aiff_header))
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return -1;
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return 0;
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}
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static int on_stream_end(union enc_chunk_hdr *hdr)
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{
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/* update template header */
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struct aiff_header aiff;
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if (hdr->err)
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{
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/* Called for stream error; get correct data size */
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ssize_t size = ci->enc_stream_lseek(0, SEEK_END);
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if (size > (ssize_t)sizeof (aiff))
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{
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pcm_size = size - sizeof (aiff);
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num_sample_frames = pcm_size / (PCM_DEPTH_BYTES*num_channels);
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}
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}
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if (ci->enc_stream_lseek(0, SEEK_SET) != 0)
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return -1;
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if (ci->enc_stream_read(&aiff, sizeof (aiff)) != sizeof (aiff))
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return -2;
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/* 'FORM' chunk */
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aiff.form_size = htobe32(pcm_size + sizeof (aiff) - 8);
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/* 'COMM' chunk */
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aiff.num_channels = htobe16(num_channels);
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aiff.num_sample_frames = htobe32(num_sample_frames);
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uint32_h_to_ieee754_extended_be(aiff.sample_rate, sample_rate);
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/* 'SSND' chunk */
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aiff.ssnd_size = htobe32(pcm_size + 8);
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if (ci->enc_stream_lseek(0, SEEK_SET) != 0)
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return -3;
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if (ci->enc_stream_write(&aiff, sizeof (aiff)) != sizeof (aiff))
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return -4;
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return 0;
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}
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/* this is the codec entry point */
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enum codec_status codec_main(enum codec_entry_call_reason reason)
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{
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return CODEC_OK;
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(void)reason;
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}
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/* this is called for each file to process */
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enum codec_status ICODE_ATTR codec_run(void)
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{
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enum { GETBUF_ENC, GETBUF_PCM } getbuf = GETBUF_ENC;
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struct enc_chunk_data *data = NULL;
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/* main encoding loop */
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while (1)
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{
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long action = ci->get_command(NULL);
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if (action != CODEC_ACTION_NULL)
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break;
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/* First obtain output buffer; when available, get PCM data */
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switch (getbuf)
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{
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case GETBUF_ENC:
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if (!(data = ci->enc_encbuf_get_buffer(frame_size)))
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continue;
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getbuf = GETBUF_PCM;
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case GETBUF_PCM:
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if (!ci->enc_pcmbuf_read(data->data, PCM_SAMP_PER_CHUNK))
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continue;
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getbuf = GETBUF_ENC;
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}
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data->hdr.size = frame_size;
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data->pcm_count = PCM_SAMP_PER_CHUNK;
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frame_htobe((uint32_t *)data->data, frame_size);
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ci->enc_pcmbuf_advance(PCM_SAMP_PER_CHUNK);
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ci->enc_encbuf_finish_buffer();
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}
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return CODEC_OK;
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}
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/* this is called by recording system */
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int ICODE_ATTR enc_callback(enum enc_callback_reason reason,
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void *params)
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{
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if (LIKELY(reason == ENC_CB_STREAM))
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{
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switch (((union enc_chunk_hdr *)params)->type)
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{
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case CHUNK_T_DATA:
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return on_stream_data(params);
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case CHUNK_T_STREAM_START:
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return on_stream_start();
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case CHUNK_T_STREAM_END:
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return on_stream_end(params);
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}
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}
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else if (reason == ENC_CB_INPUTS)
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{
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struct enc_inputs *inputs = params;
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sample_rate = inputs->sample_rate;
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num_channels = inputs->num_channels;
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frame_size = PCM_SAMP_PER_CHUNK*PCM_DEPTH_BYTES*num_channels;
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}
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return 0;
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}
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