diff options
Diffstat (limited to 'deps/libchdr/flac.c')
| -rw-r--r-- | deps/libchdr/flac.c | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/deps/libchdr/flac.c b/deps/libchdr/flac.c deleted file mode 100644 index 8e31ed6..0000000 --- a/deps/libchdr/flac.c +++ /dev/null @@ -1,331 +0,0 @@ -/* license:BSD-3-Clause - * copyright-holders:Aaron Giles -*************************************************************************** - - flac.c - - FLAC compression wrappers - -***************************************************************************/ - -#include <assert.h> -#include <string.h> -#include "flac.h" - -/*************************************************************************** - * FLAC DECODER - *************************************************************************** - */ - -static FLAC__StreamDecoderReadStatus flac_decoder_read_callback_static(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data); -FLAC__StreamDecoderReadStatus flac_decoder_read_callback(void* client_data, FLAC__byte buffer[], size_t *bytes); -static void flac_decoder_metadata_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); -static FLAC__StreamDecoderTellStatus flac_decoder_tell_callback_static(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data); -static FLAC__StreamDecoderWriteStatus flac_decoder_write_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); -FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(void* client_data, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]); -static void flac_decoder_error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); - -/* getters (valid after reset) */ -static uint32_t sample_rate(flac_decoder *decoder) { return decoder->sample_rate; } -static uint8_t channels(flac_decoder *decoder) { return decoder->channels; } -static uint8_t bits_per_sample(flac_decoder *decoder) { return decoder->bits_per_sample; } -static uint32_t total_samples(flac_decoder *decoder) { return FLAC__stream_decoder_get_total_samples(decoder->decoder); } -static FLAC__StreamDecoderState state(flac_decoder *decoder) { return FLAC__stream_decoder_get_state(decoder->decoder); } -static const char *state_string(flac_decoder *decoder) { return FLAC__stream_decoder_get_resolved_state_string(decoder->decoder); } - -/*------------------------------------------------- - * flac_decoder - constructor - *------------------------------------------------- - */ - -void flac_decoder_init(flac_decoder *decoder) -{ - decoder->decoder = FLAC__stream_decoder_new(); - decoder->sample_rate = 0; - decoder->channels = 0; - decoder->bits_per_sample = 0; - decoder->compressed_offset = 0; - decoder->compressed_start = NULL; - decoder->compressed_length = 0; - decoder->compressed2_start = NULL; - decoder->compressed2_length = 0; - decoder->uncompressed_offset = 0; - decoder->uncompressed_length = 0; - decoder->uncompressed_swap = 0; -} - -/*------------------------------------------------- - * flac_decoder - destructor - *------------------------------------------------- - */ - -void flac_decoder_free(flac_decoder* decoder) -{ - if ((decoder != NULL) && (decoder->decoder != NULL)) - FLAC__stream_decoder_delete(decoder->decoder); -} - -/*------------------------------------------------- - * reset - reset state with the original - * parameters - *------------------------------------------------- - */ - -static int flac_decoder_internal_reset(flac_decoder* decoder) -{ - decoder->compressed_offset = 0; - if (FLAC__stream_decoder_init_stream(decoder->decoder, - &flac_decoder_read_callback_static, - NULL, - &flac_decoder_tell_callback_static, - NULL, - NULL, - &flac_decoder_write_callback_static, - &flac_decoder_metadata_callback_static, - &flac_decoder_error_callback_static, decoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) - return 0; - return FLAC__stream_decoder_process_until_end_of_metadata(decoder->decoder); -} - -/*------------------------------------------------- - * reset - reset state with new memory parameters - * and a custom-generated header - *------------------------------------------------- - */ - -int flac_decoder_reset(flac_decoder* decoder, uint32_t sample_rate, uint8_t num_channels, uint32_t block_size, const void *buffer, uint32_t length) -{ - /* modify the template header with our parameters */ - static const uint8_t s_header_template[0x2a] = - { - 0x66, 0x4C, 0x61, 0x43, /* +00: 'fLaC' stream header */ - 0x80, /* +04: metadata block type 0 (STREAMINFO), */ - /* flagged as last block */ - 0x00, 0x00, 0x22, /* +05: metadata block length = 0x22 */ - 0x00, 0x00, /* +08: minimum block size */ - 0x00, 0x00, /* +0A: maximum block size */ - 0x00, 0x00, 0x00, /* +0C: minimum frame size (0 == unknown) */ - 0x00, 0x00, 0x00, /* +0F: maximum frame size (0 == unknown) */ - 0x0A, 0xC4, 0x42, 0xF0, 0x00, 0x00, 0x00, 0x00, /* +12: sample rate (0x0ac44 == 44100), */ - /* numchannels (2), sample bits (16), */ - /* samples in stream (0 == unknown) */ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* +1A: MD5 signature (0 == none) */ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* +2A: start of stream data */ - }; - memcpy(decoder->custom_header, s_header_template, sizeof(s_header_template)); - decoder->custom_header[0x08] = decoder->custom_header[0x0a] = block_size >> 8; - decoder->custom_header[0x09] = decoder->custom_header[0x0b] = block_size & 0xff; - decoder->custom_header[0x12] = sample_rate >> 12; - decoder->custom_header[0x13] = sample_rate >> 4; - decoder->custom_header[0x14] = (sample_rate << 4) | ((num_channels - 1) << 1); - - /* configure the header ahead of the provided buffer */ - decoder->compressed_start = (const FLAC__byte *)(decoder->custom_header); - decoder->compressed_length = sizeof(decoder->custom_header); - decoder->compressed2_start = (const FLAC__byte *)(buffer); - decoder->compressed2_length = length; - return flac_decoder_internal_reset(decoder); -} - -/*------------------------------------------------- - * decode_interleaved - decode to an interleaved - * sound stream - *------------------------------------------------- - */ - -int flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian) -{ - /* configure the uncompressed buffer */ - memset(decoder->uncompressed_start, 0, sizeof(decoder->uncompressed_start)); - decoder->uncompressed_start[0] = samples; - decoder->uncompressed_offset = 0; - decoder->uncompressed_length = num_samples; - decoder->uncompressed_swap = swap_endian; - - /* loop until we get everything we want */ - while (decoder->uncompressed_offset < decoder->uncompressed_length) - if (!FLAC__stream_decoder_process_single(decoder->decoder)) - return 0; - return 1; -} - -#if 0 -/*------------------------------------------------- - * decode - decode to an multiple independent - * data streams - *------------------------------------------------- - */ - -bool flac_decoder::decode(int16_t **samples, uint32_t num_samples, bool swap_endian) -{ - /* make sure we don't have too many channels */ - int chans = channels(); - if (chans > ARRAY_LENGTH(m_uncompressed_start)) - return false; - - /* configure the uncompressed buffer */ - memset(m_uncompressed_start, 0, sizeof(m_uncompressed_start)); - for (int curchan = 0; curchan < chans; curchan++) - m_uncompressed_start[curchan] = samples[curchan]; - m_uncompressed_offset = 0; - m_uncompressed_length = num_samples; - m_uncompressed_swap = swap_endian; - - /* loop until we get everything we want */ - while (m_uncompressed_offset < m_uncompressed_length) - if (!FLAC__stream_decoder_process_single(m_decoder)) - return false; - return true; -} -#endif - -/*------------------------------------------------- - * finish - finish up the decode - *------------------------------------------------- - */ - -uint32_t flac_decoder_finish(flac_decoder* decoder) -{ - /* get the final decoding position and move forward */ - FLAC__uint64 position = 0; - FLAC__stream_decoder_get_decode_position(decoder->decoder, &position); - FLAC__stream_decoder_finish(decoder->decoder); - - /* adjust position if we provided the header */ - if (position == 0) - return 0; - if (decoder->compressed_start == (const FLAC__byte *)(decoder->custom_header)) - position -= decoder->compressed_length; - return position; -} - -/*------------------------------------------------- - * read_callback - handle reads from the input - * stream - *------------------------------------------------- - */ - -#define MIN(x, y) ((x) < (y) ? (x) : (y)) - -FLAC__StreamDecoderReadStatus flac_decoder_read_callback_static(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data) -{ - return flac_decoder_read_callback(client_data, buffer, bytes); -} - -FLAC__StreamDecoderReadStatus flac_decoder_read_callback(void* client_data, FLAC__byte buffer[], size_t *bytes) -{ - flac_decoder* decoder = (flac_decoder*)client_data; - - uint32_t expected = *bytes; - - /* copy from primary buffer first */ - uint32_t outputpos = 0; - if (outputpos < *bytes && decoder->compressed_offset < decoder->compressed_length) - { - uint32_t bytes_to_copy = MIN(*bytes - outputpos, decoder->compressed_length - decoder->compressed_offset); - memcpy(&buffer[outputpos], decoder->compressed_start + decoder->compressed_offset, bytes_to_copy); - outputpos += bytes_to_copy; - decoder->compressed_offset += bytes_to_copy; - } - - /* once we're out of that, copy from the secondary buffer */ - if (outputpos < *bytes && decoder->compressed_offset < decoder->compressed_length + decoder->compressed2_length) - { - uint32_t bytes_to_copy = MIN(*bytes - outputpos, decoder->compressed2_length - (decoder->compressed_offset - decoder->compressed_length)); - memcpy(&buffer[outputpos], decoder->compressed2_start + decoder->compressed_offset - decoder->compressed_length, bytes_to_copy); - outputpos += bytes_to_copy; - decoder->compressed_offset += bytes_to_copy; - } - *bytes = outputpos; - - /* return based on whether we ran out of data */ - return (*bytes < expected) ? FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM : FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; -} - -/*------------------------------------------------- - * metadata_callback - handle STREAMINFO metadata - *------------------------------------------------- - */ - -void flac_decoder_metadata_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) -{ - flac_decoder *fldecoder; - /* ignore all but STREAMINFO metadata */ - if (metadata->type != FLAC__METADATA_TYPE_STREAMINFO) - return; - - /* parse out the data we care about */ - fldecoder = (flac_decoder *)(client_data); - fldecoder->sample_rate = metadata->data.stream_info.sample_rate; - fldecoder->bits_per_sample = metadata->data.stream_info.bits_per_sample; - fldecoder->channels = metadata->data.stream_info.channels; -} - -/*------------------------------------------------- - * tell_callback - handle requests to find out - * where in the input stream we are - *------------------------------------------------- - */ - -FLAC__StreamDecoderTellStatus flac_decoder_tell_callback_static(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data) -{ - *absolute_byte_offset = ((flac_decoder *)client_data)->compressed_offset; - return FLAC__STREAM_DECODER_TELL_STATUS_OK; -} - -/*------------------------------------------------- - * write_callback - handle writes to the output - * stream - *------------------------------------------------- - */ - -FLAC__StreamDecoderWriteStatus flac_decoder_write_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) -{ - return flac_decoder_write_callback(client_data, frame, buffer); -} - -FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(void *client_data, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]) -{ - int sampnum, chan; - int shift, blocksize; - flac_decoder * decoder = (flac_decoder *)client_data; - - assert(frame->header.channels == channels(decoder)); - - /* interleaved case */ - shift = decoder->uncompressed_swap ? 8 : 0; - blocksize = frame->header.blocksize; - if (decoder->uncompressed_start[1] == NULL) - { - int16_t *dest = decoder->uncompressed_start[0] + decoder->uncompressed_offset * frame->header.channels; - for (sampnum = 0; sampnum < blocksize && decoder->uncompressed_offset < decoder->uncompressed_length; sampnum++, decoder->uncompressed_offset++) - for (chan = 0; chan < frame->header.channels; chan++) - *dest++ = (int16_t)((((uint16_t)buffer[chan][sampnum]) << shift) | (((uint16_t)buffer[chan][sampnum]) >> shift)); - } - - /* non-interleaved case */ - else - { - for (sampnum = 0; sampnum < blocksize && decoder->uncompressed_offset < decoder->uncompressed_length; sampnum++, decoder->uncompressed_offset++) - for (chan = 0; chan < frame->header.channels; chan++) - if (decoder->uncompressed_start[chan] != NULL) - decoder->uncompressed_start[chan][decoder->uncompressed_offset] = (int16_t) ( (((uint16_t)(buffer[chan][sampnum])) << shift) | ( ((uint16_t)(buffer[chan][sampnum])) >> shift) ); - } - return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; -} - -/** - * @fn void flac_decoder::error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) - * - * @brief ------------------------------------------------- - * error_callback - handle errors (ignore them) - * -------------------------------------------------. - * - * @param decoder The decoder. - * @param status The status. - * @param [in,out] client_data If non-null, information describing the client. - */ - -void flac_decoder_error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) -{ -} |