370 lines
12 KiB
C
370 lines
12 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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*
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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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#ifndef SIMULATOR
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#include <inttypes.h>
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#include "codeclib.h"
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CODEC_ENC_HEADER
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struct riff_header
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{
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uint8_t riff_id[4]; /* 00h - "RIFF" */
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uint32_t riff_size; /* 04h - sz following headers + data_size */
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/* format header */
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uint8_t format[4]; /* 08h - "WAVE" */
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uint8_t format_id[4]; /* 0Ch - "fmt " */
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uint32_t format_size; /* 10h - 16 for PCM (sz format data) */
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/* format data */
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uint16_t audio_format; /* 14h - 1=PCM */
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uint16_t num_channels; /* 16h - 1=M, 2=S, etc. */
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uint32_t sample_rate; /* 18h - HZ */
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uint32_t byte_rate; /* 1Ch - num_channels*sample_rate*bits_per_sample/8 */
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uint16_t block_align; /* 20h - num_channels*bits_per_samples/8 */
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uint16_t bits_per_sample; /* 22h - 8=8 bits, 16=16 bits, etc. */
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/* Not for audio_format=1 (PCM) */
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/* unsigned short extra_param_size; 24h - size of extra data */
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/* unsigned char *extra_params; */
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/* data header */
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uint8_t data_id[4]; /* 24h - "data" */
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uint32_t data_size; /* 28h - num_samples*num_channels*bits_per_sample/8 */
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/* unsigned char *data; 2ch - actual sound data */
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} __attribute__((packed));
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#define RIFF_FMT_HEADER_SIZE 12 /* format -> format_size */
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#define RIFF_FMT_DATA_SIZE 16 /* audio_format -> bits_per_sample */
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#define RIFF_DATA_HEADER_SIZE 8 /* data_id -> data_size */
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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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#define PCM_CHUNK_SIZE (PCM_SAMP_PER_CHUNK*4)
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static int num_channels IBSS_ATTR;
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static uint32_t sample_rate;
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static uint32_t enc_size;
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static int32_t err IBSS_ATTR;
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static const struct riff_header riff_header =
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{
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/* "RIFF" header */
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{ 'R', 'I', 'F', 'F' }, /* riff_id */
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0, /* riff_size (*) */
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/* format header */
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{ 'W', 'A', 'V', 'E' }, /* format */
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{ 'f', 'm', 't', ' ' }, /* format_id */
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H_TO_LE32(16), /* format_size */
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/* format data */
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H_TO_LE16(1), /* audio_format */
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0, /* num_channels (*) */
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0, /* sample_rate (*) */
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0, /* byte_rate (*) */
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0, /* block_align (*) */
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H_TO_LE16(PCM_DEPTH_BITS), /* bits_per_sample */
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/* data header */
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{ 'd', 'a', 't', 'a' }, /* data_id */
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0 /* data_size (*) */
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/* (*) updated during ENC_END_FILE event */
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};
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/* called version often - inline */
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static inline bool is_file_data_ok(struct enc_file_event_data *data) ICODE_ATTR;
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static inline bool is_file_data_ok(struct enc_file_event_data *data)
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{
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return data->rec_file >= 0 && (long)data->chunk->flags >= 0;
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} /* is_file_data_ok */
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/* called version often - inline */
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static inline bool on_write_chunk(struct enc_file_event_data *data) ICODE_ATTR;
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static inline bool on_write_chunk(struct enc_file_event_data *data)
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{
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if (!is_file_data_ok(data))
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return false;
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if (data->chunk->enc_data == NULL)
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{
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#ifdef ROCKBOX_HAS_LOGF
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ci->logf("wav enc: NULL data");
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#endif
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return true;
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}
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if (ci->write(data->rec_file, data->chunk->enc_data,
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data->chunk->enc_size) != (ssize_t)data->chunk->enc_size)
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return false;
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data->num_pcm_samples += data->chunk->num_pcm;
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return true;
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} /* on_write_chunk */
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static bool on_start_file(struct enc_file_event_data *data)
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{
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if ((data->chunk->flags & CHUNKF_ERROR) || *data->filename == '\0')
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return false;
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data->rec_file = ci->open(data->filename, O_RDWR|O_CREAT|O_TRUNC);
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if (data->rec_file < 0)
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return false;
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/* reset sample count */
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data->num_pcm_samples = 0;
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/* write template header */
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if (ci->write(data->rec_file, &riff_header, sizeof (riff_header))
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!= sizeof (riff_header))
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{
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return false;
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}
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data->new_enc_size += sizeof (riff_header);
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return true;
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} /* on_start_file */
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static bool on_end_file(struct enc_file_event_data *data)
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{
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/* update template header */
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struct riff_header hdr;
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uint32_t data_size;
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if (data->rec_file < 0)
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return false; /* file already closed, nothing more we can do */
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/* always _try_ to write the file header, even on error */
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if ((ci->lseek(data->rec_file, 0, SEEK_SET)) ||
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(ci->read(data->rec_file, &hdr, sizeof (hdr)) != sizeof (hdr)))
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{
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return false;
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}
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data_size = data->num_pcm_samples*num_channels*PCM_DEPTH_BYTES;
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/* "RIFF" header */
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hdr.riff_size = htole32(RIFF_FMT_HEADER_SIZE + RIFF_FMT_DATA_SIZE
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+ RIFF_DATA_HEADER_SIZE + data_size);
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/* format data */
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hdr.num_channels = htole16(num_channels);
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hdr.sample_rate = htole32(sample_rate);
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hdr.byte_rate = htole32(sample_rate*num_channels* PCM_DEPTH_BYTES);
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hdr.block_align = htole16(num_channels*PCM_DEPTH_BYTES);
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/* data header */
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hdr.data_size = htole32(data_size);
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if (ci->lseek(data->rec_file, 0, SEEK_SET) != 0 ||
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ci->write(data->rec_file, &hdr, sizeof (hdr)) != sizeof (hdr) ||
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ci->close(data->rec_file) != 0)
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{
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return false;
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}
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data->rec_file = -1;
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return true;
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} /* on_end_file */
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STATICIRAM void enc_events_callback(enum enc_events event, void *data)
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ICODE_ATTR;
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STATICIRAM void enc_events_callback(enum enc_events event, void *data)
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{
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if (event == ENC_WRITE_CHUNK)
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{
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if (on_write_chunk((struct enc_file_event_data *)data))
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return;
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}
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else if (event == ENC_START_FILE)
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{
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if (on_start_file((struct enc_file_event_data *)data))
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return;
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}
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else if (event == ENC_END_FILE)
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{
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if (on_end_file((struct enc_file_event_data *)data))
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return;
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}
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else
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{
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return;
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}
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((struct enc_file_event_data *)data)->chunk->flags |= CHUNKF_ERROR;
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} /* enc_events_callback */
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/* convert native pcm samples to wav format samples */
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static inline void sample_to_mono(uint32_t **src, uint32_t **dst)
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{
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int32_t lr1, lr2;
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lr1 = *(*src)++;
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lr1 = (int16_t)lr1 + (lr1 >> 16) + err;
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err = lr1 & 1;
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lr1 >>= 1;
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lr2 = *(*src)++;
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lr2 = (int16_t)lr2 + (lr2 >> 16) + err;
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err = lr2 & 1;
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lr2 >>= 1;
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*(*dst)++ = swap_odd_even_be32((lr1 << 16) | (uint16_t)lr2);
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} /* sample_to_mono */
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STATICIRAM void chunk_to_wav_format(uint32_t *src, uint32_t *dst) ICODE_ATTR;
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STATICIRAM void chunk_to_wav_format(uint32_t *src, uint32_t *dst)
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{
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if (num_channels == 1)
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{
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/* On big endian:
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* |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr|
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* |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| =>
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* |mmmmmmmmMMMMMMMM|mmmmmmmmMMMMMMMM|
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*
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* On little endian:
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* |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR|
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* |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| =>
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* |mmmmmmmmMMMMMMMM|mmmmmmmmMMMMMMMM|
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*/
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uint32_t *src_end = src + PCM_SAMP_PER_CHUNK;
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do
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{
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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sample_to_mono(&src, &dst);
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}
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while (src < src_end);
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}
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else
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{
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#ifdef ROCKBOX_BIG_ENDIAN
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/* |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| =>
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* |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR|
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*/
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uint32_t *src_end = src + PCM_SAMP_PER_CHUNK;
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do
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{
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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*dst++ = swap_odd_even32(*src++);
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}
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while (src < src_end);
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#else
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/* |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| =>
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* |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR|
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*/
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ci->memcpy(dst, src, PCM_CHUNK_SIZE);
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#endif
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}
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} /* chunk_to_wav_format */
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static bool init_encoder(void)
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{
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struct enc_inputs inputs;
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struct enc_parameters params;
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if (ci->enc_get_inputs == NULL ||
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ci->enc_set_parameters == NULL ||
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ci->enc_get_chunk == NULL ||
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ci->enc_finish_chunk == NULL ||
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ci->enc_get_pcm_data == NULL )
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return false;
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ci->enc_get_inputs(&inputs);
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if (inputs.config->afmt != AFMT_PCM_WAV)
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return false;
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sample_rate = inputs.sample_rate;
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num_channels = inputs.num_channels;
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err = 0;
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/* configure the buffer system */
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params.afmt = AFMT_PCM_WAV;
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enc_size = PCM_CHUNK_SIZE*inputs.num_channels / 2;
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params.chunk_size = enc_size;
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params.enc_sample_rate = sample_rate;
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params.reserve_bytes = 0;
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params.events_callback = enc_events_callback;
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ci->enc_set_parameters(¶ms);
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return true;
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} /* init_encoder */
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/* main codec entry point */
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enum codec_status codec_main(void)
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{
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if (!init_encoder())
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{
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ci->enc_codec_loaded = -1;
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return CODEC_ERROR;
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}
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/* main application waits for this flag during encoder loading */
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ci->enc_codec_loaded = 1;
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/* main encoding loop */
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while(!ci->stop_encoder)
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{
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uint32_t *src;
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while ((src = (uint32_t *)ci->enc_get_pcm_data(PCM_CHUNK_SIZE)) != NULL)
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{
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struct enc_chunk_hdr *chunk;
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if (ci->stop_encoder)
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break;
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chunk = ci->enc_get_chunk();
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chunk->enc_size = enc_size;
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chunk->num_pcm = PCM_SAMP_PER_CHUNK;
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chunk->enc_data = ENC_CHUNK_SKIP_HDR(chunk->enc_data, chunk);
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chunk_to_wav_format(src, (uint32_t *)chunk->enc_data);
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ci->enc_finish_chunk();
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ci->yield();
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}
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ci->yield();
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}
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/* reset parameters to initial state */
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ci->enc_set_parameters(NULL);
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/* main application waits for this flag during encoder removing */
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ci->enc_codec_loaded = 0;
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return CODEC_OK;
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} /* codec_start */
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#endif /* ndef SIMULATOR */
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