diff options
Diffstat (limited to 'tools/aif2pcm/main.c')
| -rw-r--r-- | tools/aif2pcm/main.c | 70 |
1 files changed, 52 insertions, 18 deletions
diff --git a/tools/aif2pcm/main.c b/tools/aif2pcm/main.c index 3dad6fcf8..720db1aca 100644 --- a/tools/aif2pcm/main.c +++ b/tools/aif2pcm/main.c @@ -51,8 +51,12 @@ do \ typedef struct { unsigned long num_samples; - uint8_t *samples; + union { + uint8_t *samples8; + uint16_t *samples16; + }; uint8_t midi_note; + uint8_t sample_size; bool has_loop; unsigned long loop_offset; double sample_rate; @@ -208,11 +212,11 @@ void read_aif(struct Bytes *aif, AifData *aif_data) num_sample_frames |= (aif->data[pos++] << 8); num_sample_frames |= (uint8_t)aif->data[pos++]; - short sample_size = (aif->data[pos++] << 8); - sample_size |= (uint8_t)aif->data[pos++]; - if (sample_size != 8) + aif_data->sample_size = (aif->data[pos++] << 8); + aif_data->sample_size |= (uint8_t)aif->data[pos++]; + if (aif_data->sample_size != 8 && aif_data->sample_size != 16) { - FATAL_ERROR("sampleSize (%d) in the COMM Chunk must be 8!\n", sample_size); + FATAL_ERROR("sampleSize (%d) in the COMM Chunk must be 8 or 16!\n", aif_data->sample_size); } double sample_rate = ieee754_read_extended((uint8_t*)(aif->data + pos)); @@ -295,11 +299,28 @@ void read_aif(struct Bytes *aif, AifData *aif_data) pos += 8; unsigned long num_samples = chunk_size - 8; - uint8_t *sample_data = (uint8_t *)malloc(num_samples * sizeof(uint8_t)); - memcpy(sample_data, &aif->data[pos], num_samples); - - aif_data->samples = sample_data; - aif_data->real_num_samples = num_samples; + if (aif_data->sample_size == 8) + { + uint8_t *sample_data = (uint8_t *)malloc(num_samples * sizeof(uint8_t)); + memcpy(sample_data, &aif->data[pos], num_samples); + + aif_data->samples8 = sample_data; + aif_data->real_num_samples = num_samples; + } + else + { + uint16_t *sample_data = (uint16_t *)malloc(num_samples * sizeof(uint16_t)); + uint16_t *sample_data_swapped = (uint16_t *)malloc(num_samples * sizeof(uint16_t)); + memcpy(sample_data, &aif->data[pos], num_samples); + for (long unsigned i = 0; i < num_samples; i++) + { + sample_data_swapped[i] = __builtin_bswap16(sample_data[i]); + } + + aif_data->samples16 = sample_data_swapped; + aif_data->real_num_samples = num_samples; + free(sample_data); + } pos += chunk_size - 8; } else @@ -550,8 +571,21 @@ do { \ void aif2pcm(const char *aif_filename, const char *pcm_filename, bool compress) { struct Bytes *aif = read_bytearray(aif_filename); - AifData aif_data = {0,0,0,0,0,0,0}; + AifData aif_data = {0}; read_aif(aif, &aif_data); + + // Convert 16-bit to 8-bit if necessary + if (aif_data.sample_size == 16) + { + aif_data.real_num_samples /= 2; + uint8_t *converted_samples = malloc(aif_data.real_num_samples * sizeof(uint8_t)); + for (unsigned long i = 0; i < aif_data.real_num_samples; i++) + { + converted_samples[i] = aif_data.samples16[i] >> 8; + } + free(aif_data.samples16); + aif_data.samples8 = converted_samples; + } int header_size = 0x10; struct Bytes *pcm; @@ -560,7 +594,7 @@ void aif2pcm(const char *aif_filename, const char *pcm_filename, bool compress) if (compress) { struct Bytes *input = malloc(sizeof(struct Bytes)); - input->data = aif_data.samples; + input->data = aif_data.samples8; input->length = aif_data.real_num_samples; pcm = delta_compress(input); free(input); @@ -568,7 +602,7 @@ void aif2pcm(const char *aif_filename, const char *pcm_filename, bool compress) else { pcm = malloc(sizeof(struct Bytes)); - pcm->data = aif_data.samples; + pcm->data = aif_data.samples8; pcm->length = aif_data.real_num_samples; } output.length = header_size + pcm->length; @@ -591,7 +625,7 @@ void aif2pcm(const char *aif_filename, const char *pcm_filename, bool compress) free(aif); free(pcm); free(output.data); - free(aif_data.samples); + free(aif_data.samples8); } // Reads a .pcm file containing an array of 8-bit samples and produces an .aif file. @@ -631,8 +665,8 @@ void pcm2aif(const char *pcm_filename, const char *aif_filename, uint32_t base_n pcm->data += 0x10; } - aif_data->samples = malloc(pcm->length); - memcpy(aif_data->samples, pcm->data, pcm->length); + aif_data->samples8 = malloc(pcm->length); + memcpy(aif_data->samples8, pcm->data, pcm->length); struct Bytes *aif = malloc(sizeof(struct Bytes)); aif->length = 54 + 60 + pcm->length; @@ -819,14 +853,14 @@ void pcm2aif(const char *pcm_filename, const char *aif_filename, uint32_t base_n // Sound Data Chunk soundData for (unsigned int i = 0; i < aif_data->loop_offset; i++) { - aif->data[pos++] = aif_data->samples[i]; + aif->data[pos++] = aif_data->samples8[i]; } int j = 0; for (unsigned int i = aif_data->loop_offset; i < pcm->length; i++) { int pcm_index = aif_data->loop_offset + (j++ % (pcm->length - aif_data->loop_offset)); - aif->data[pos++] = aif_data->samples[pcm_index]; + aif->data[pos++] = aif_data->samples8[pcm_index]; } aif->length = pos; |