/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2006 Antonius Hellmann * * 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. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #ifndef SIMULATOR #include #include "codeclib.h" CODEC_ENC_HEADER struct aiff_header { uint8_t form_id[4]; /* 00h - 'FORM' */ uint32_t form_size; /* 04h - size of file - 8 */ uint8_t aiff_id[4]; /* 08h - 'AIFF' */ uint8_t comm_id[4]; /* 0Ch - 'COMM' */ int32_t comm_size; /* 10h - num_channels through sample_rate (18) */ int16_t num_channels; /* 14h - 1=M, 2=S, etc. */ uint32_t num_sample_frames; /* 16h - num samples for each channel */ int16_t sample_size; /* 1ah - 1-32 bits per sample */ uint8_t sample_rate[10]; /* 1ch - IEEE 754 80-bit floating point */ uint8_t ssnd_id[4]; /* 26h - "SSND" */ int32_t ssnd_size; /* 2ah - size of chunk from offset to end of pcm data */ uint32_t offset; /* 2eh - data offset from end of header */ uint32_t block_size; /* 32h - pcm data alignment */ /* 36h */ } __attribute__((packed)); #define PCM_DEPTH_BYTES 2 #define PCM_DEPTH_BITS 16 #define PCM_SAMP_PER_CHUNK 2048 #define PCM_CHUNK_SIZE (PCM_SAMP_PER_CHUNK*4) /* Template headers */ struct aiff_header aiff_header = { { 'F', 'O', 'R', 'M' }, /* form_id */ 0, /* form_size (*) */ { 'A', 'I', 'F', 'F' }, /* aiff_id */ { 'C', 'O', 'M', 'M' }, /* comm_id */ H_TO_BE32(18), /* comm_size */ 0, /* num_channels (*) */ 0, /* num_sample_frames (*) */ H_TO_BE32(PCM_DEPTH_BITS), /* sample_size */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* sample_rate (*) */ { 'S', 'S', 'N', 'D' }, /* ssnd_id */ 0, /* ssnd_size (*) */ H_TO_BE32(0), /* offset */ H_TO_BE32(0), /* block_size */ }; /* (*) updated when finalizing file */ static int num_channels; uint32_t sample_rate; uint32_t enc_size; /* convert unsigned 32 bit value to 80-bit floating point number */ static void uint32_h_to_ieee754_extended_be(uint8_t f[10], uint32_t l) ICODE_ATTR; static void uint32_h_to_ieee754_extended_be(uint8_t f[10], uint32_t l) { int32_t exp; ci->memset(f, 0, 10); if (l == 0) return; for (exp = 30; (l & (1ul << 31)) == 0; exp--) l <<= 1; /* sign always zero - bit 79 */ /* exponent is 0-31 (normalized: 31 - shift + 16383) - bits 64-78 */ f[0] = 0x40; f[1] = (uint8_t)exp; /* mantissa is value left justified with most significant non-zero bit stored in bit 63 - bits 0-63 */ *(uint32_t *)&f[2] = htobe32(l); } /* uint32_h_to_ieee754_extended_be */ /* called version often - inline */ static inline bool is_file_data_ok(struct enc_file_event_data *data) ICODE_ATTR; static inline bool is_file_data_ok(struct enc_file_event_data *data) { return data->rec_file >= 0 && (long)data->chunk->flags >= 0; } /* is_file_data_ok */ /* called version often - inline */ static inline bool on_write_chunk(struct enc_file_event_data *data) ICODE_ATTR; static inline bool on_write_chunk(struct enc_file_event_data *data) { if (!is_file_data_ok(data)) return false; if (data->chunk->enc_data == NULL) { #ifdef ROCKBOX_HAS_LOGF ci->logf("aiff enc: NULL data"); #endif return true; } if (ci->write(data->rec_file, data->chunk->enc_data, data->chunk->enc_size) != (ssize_t)data->chunk->enc_size) return false; data->num_pcm_samples += data->chunk->num_pcm; return true; } /* on_write_chunk */ static bool on_start_file(struct enc_file_event_data *data) { if ((data->chunk->flags & CHUNKF_ERROR) || *data->filename == '\0') return false; data->rec_file = ci->open(data->filename, O_RDWR|O_CREAT|O_TRUNC); if (data->rec_file < 0) return false; /* reset sample count */ data->num_pcm_samples = 0; /* write template headers */ if (ci->write(data->rec_file, &aiff_header, sizeof (aiff_header)) != sizeof (aiff_header)) { return false; } data->new_enc_size += sizeof(aiff_header); return true; } /* on_start_file */ static bool on_end_file(struct enc_file_event_data *data) { /* update template headers */ struct aiff_header hdr; uint32_t data_size; if (!is_file_data_ok(data)) return false; if (ci->lseek(data->rec_file, 0, SEEK_SET) != 0 || ci->read(data->rec_file, &hdr, sizeof (hdr)) != sizeof (hdr)) { return false; } data_size = data->num_pcm_samples*num_channels*PCM_DEPTH_BYTES; /* 'FORM' chunk */ hdr.form_size = htobe32(data_size + sizeof (hdr) - 8); /* 'COMM' chunk */ hdr.num_channels = htobe16(num_channels); hdr.num_sample_frames = htobe32(data->num_pcm_samples); uint32_h_to_ieee754_extended_be(hdr.sample_rate, sample_rate); /* 'SSND' chunk */ hdr.ssnd_size = htobe32(data_size + 8); if (ci->lseek(data->rec_file, 0, SEEK_SET) != 0 || ci->write(data->rec_file, &hdr, sizeof (hdr)) != sizeof (hdr)) { return false; } ci->fsync(data->rec_file); ci->close(data->rec_file); data->rec_file = -1; return true; } /* on_end_file */ static void enc_events_callback(enum enc_events event, void *data) ICODE_ATTR; static void enc_events_callback(enum enc_events event, void *data) { if (event == ENC_WRITE_CHUNK) { if (on_write_chunk((struct enc_file_event_data *)data)) return; } else if (event == ENC_START_FILE) { if (on_start_file((struct enc_file_event_data *)data)) return; } else if (event == ENC_END_FILE) { if (on_end_file((struct enc_file_event_data *)data)) return; } else { return; } ((struct enc_file_event_data *)data)->chunk->flags |= CHUNKF_ERROR; } /* enc_events_callback */ /* convert native pcm samples to aiff format samples */ static void chunk_to_aiff_format(uint32_t *src, uint32_t *dst) ICODE_ATTR; static void chunk_to_aiff_format(uint32_t *src, uint32_t *dst) { if (num_channels == 1) { /* On big endian: * |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| * |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| => * |MMMMMMMMmmmmmmmm|MMMMMMMMmmmmmmmm| * * On little endian: * |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| * |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| => * |MMMMMMMMmmmmmmmm|MMMMMMMMmmmmmmmm| */ uint32_t *src_end = src + PCM_SAMP_PER_CHUNK; inline void to_mono(uint32_t **src, uint32_t **dst) { int32_t lr1, lr2; lr1 = *(*src)++; lr1 = ((int16_t)lr1 + (lr1 >> 16)) >> 1; lr2 = *(*src)++; lr2 = ((int16_t)lr2 + (lr2 >> 16)) >> 1; *(*dst)++ = swap_odd_even_le32((lr1 << 16) | (uint16_t)lr2); } /* to_mono */ do { to_mono(&src, &dst); to_mono(&src, &dst); to_mono(&src, &dst); to_mono(&src, &dst); to_mono(&src, &dst); to_mono(&src, &dst); to_mono(&src, &dst); to_mono(&src, &dst); } while (src < src_end); } else { #ifdef ROCKBOX_BIG_ENDIAN /* |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| => * |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| */ ci->memcpy(dst, src, PCM_CHUNK_SIZE); #else /* |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| => * |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| */ uint32_t *src_end = src + PCM_SAMP_PER_CHUNK; do { *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); *dst++ = swap_odd_even32(*src++); } while (src < src_end); #endif } } /* chunk_to_aiff_format */ static bool init_encoder(void) { struct enc_inputs inputs; struct enc_parameters params; if (ci->enc_get_inputs == NULL || ci->enc_set_parameters == NULL || ci->enc_get_chunk == NULL || ci->enc_finish_chunk == NULL || ci->enc_pcm_buf_near_empty == NULL || ci->enc_get_pcm_data == NULL ) return false; ci->enc_get_inputs(&inputs); if (inputs.config->afmt != AFMT_AIFF) return false; sample_rate = inputs.sample_rate; num_channels = inputs.num_channels; /* configure the buffer system */ params.afmt = AFMT_AIFF; enc_size = PCM_CHUNK_SIZE*inputs.num_channels / 2; params.chunk_size = enc_size; params.enc_sample_rate = sample_rate; params.reserve_bytes = 0; params.events_callback = enc_events_callback; ci->enc_set_parameters(¶ms); return true; } /* init_encoder */ /* main codec entry point */ enum codec_status codec_start(void) { bool cpu_boosted; if (!init_encoder()) { ci->enc_codec_loaded = -1; return CODEC_ERROR; } /* main application waits for this flag during encoder loading */ ci->enc_codec_loaded = 1; ci->cpu_boost(true); cpu_boosted = true; /* main encoding loop */ while(!ci->stop_codec) { uint32_t *src; while ((src = (uint32_t *)ci->enc_get_pcm_data(PCM_CHUNK_SIZE)) != NULL) { struct enc_chunk_hdr *chunk; if (ci->stop_codec) break; if (!cpu_boosted && ci->enc_pcm_buf_near_empty() == 0) { ci->cpu_boost(true); cpu_boosted = true; } chunk = ci->enc_get_chunk(); chunk->enc_size = enc_size; chunk->num_pcm = PCM_SAMP_PER_CHUNK; chunk->enc_data = ENC_CHUNK_SKIP_HDR(chunk->enc_data, chunk); chunk_to_aiff_format(src, (uint32_t *)chunk->enc_data); ci->enc_finish_chunk(); ci->yield(); } if (cpu_boosted && ci->enc_pcm_buf_near_empty() != 0) { ci->cpu_boost(false); cpu_boosted = false; } ci->yield(); } if (cpu_boosted) /* set initial boost state */ ci->cpu_boost(false); /* reset parameters to initial state */ ci->enc_set_parameters(NULL); /* main application waits for this flag during encoder removing */ ci->enc_codec_loaded = 0; return CODEC_OK; } /* codec_start */ #endif /* ndef SIMULATOR */