diff options
Diffstat (limited to 'examples/c/decode/file')
| -rw-r--r-- | examples/c/decode/file/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | examples/c/decode/file/Makefile.am | 29 | ||||
| -rw-r--r-- | examples/c/decode/file/Makefile.in | 662 | ||||
| -rw-r--r-- | examples/c/decode/file/main.c | 200 |
4 files changed, 893 insertions, 0 deletions
diff --git a/examples/c/decode/file/CMakeLists.txt b/examples/c/decode/file/CMakeLists.txt new file mode 100644 index 0000000..53a2991 --- /dev/null +++ b/examples/c/decode/file/CMakeLists.txt @@ -0,0 +1,2 @@ +add_executable(decode_file main.c) +target_link_libraries(decode_file FLAC) diff --git a/examples/c/decode/file/Makefile.am b/examples/c/decode/file/Makefile.am new file mode 100644 index 0000000..b74a782 --- /dev/null +++ b/examples/c/decode/file/Makefile.am @@ -0,0 +1,29 @@ +# example_c_decode_file - Simple FLAC file decoder using libFLAC +# Copyright (C) 2007-2009 Josh Coalson +# Copyright (C) 2011-2023 Xiph.Org Foundation +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +EXTRA_DIST = \ + CMakeLists.txt + +AM_CPPFLAGS = -I$(top_builddir) -I$(srcdir)/include -I$(top_srcdir)/include +noinst_PROGRAMS = example_c_decode_file +example_c_decode_file_LDADD = \ + $(top_builddir)/src/libFLAC/libFLAC.la + +example_c_decode_file_SOURCES = main.c + +CLEANFILES = example_c_decode_file.exe diff --git a/examples/c/decode/file/Makefile.in b/examples/c/decode/file/Makefile.in new file mode 100644 index 0000000..2e80162 --- /dev/null +++ b/examples/c/decode/file/Makefile.in @@ -0,0 +1,662 @@ +# Makefile.in generated by automake 1.16.5 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2021 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# example_c_decode_file - Simple FLAC file decoder using libFLAC +# Copyright (C) 2007-2009 Josh Coalson +# Copyright (C) 2011-2023 Xiph.Org Foundation +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* + * This example shows how to use libFLAC to decode a FLAC file to a WAVE + * file. It only supports 16-bit stereo files. + * + * Complete API documentation can be found at: + * http://xiph.org/flac/api/ + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include "share/compat.h" +#include "FLAC/stream_decoder.h" + +static FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); +static void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); +static void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); + +static FLAC__uint64 total_samples = 0; +static unsigned sample_rate = 0; +static unsigned channels = 0; +static unsigned bps = 0; + +static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 x) +{ + return + fputc(x, f) != EOF && + fputc(x >> 8, f) != EOF + ; +} + +static FLAC__bool write_little_endian_int16(FILE *f, FLAC__int16 x) +{ + return write_little_endian_uint16(f, (FLAC__uint16)x); +} + +static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 x) +{ + return + fputc(x, f) != EOF && + fputc(x >> 8, f) != EOF && + fputc(x >> 16, f) != EOF && + fputc(x >> 24, f) != EOF + ; +} + +int main(int argc, char *argv[]) +{ + FLAC__bool ok = true; + FLAC__StreamDecoder *decoder = 0; + FLAC__StreamDecoderInitStatus init_status; + FILE *fout; + + if(argc != 3) { + fprintf(stderr, "usage: %s infile.flac outfile.wav\n", argv[0]); + return 1; + } + + if((fout = fopen(argv[2], "wb")) == NULL) { + fprintf(stderr, "ERROR: opening %s for output\n", argv[2]); + return 1; + } + + if((decoder = FLAC__stream_decoder_new()) == NULL) { + fprintf(stderr, "ERROR: allocating decoder\n"); + fclose(fout); + return 1; + } + + (void)FLAC__stream_decoder_set_md5_checking(decoder, true); + + init_status = FLAC__stream_decoder_init_file(decoder, argv[1], write_callback, metadata_callback, error_callback, /*client_data=*/fout); + if(init_status != FLAC__STREAM_DECODER_INIT_STATUS_OK) { + fprintf(stderr, "ERROR: initializing decoder: %s\n", FLAC__StreamDecoderInitStatusString[init_status]); + ok = false; + } + + if(ok) { + ok = FLAC__stream_decoder_process_until_end_of_stream(decoder); + fprintf(stderr, "decoding: %s\n", ok? "succeeded" : "FAILED"); + fprintf(stderr, " state: %s\n", FLAC__StreamDecoderStateString[FLAC__stream_decoder_get_state(decoder)]); + } + + FLAC__stream_decoder_delete(decoder); + fclose(fout); + + return 0; +} + +FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) +{ + FILE *f = (FILE*)client_data; + const FLAC__uint32 total_size = (FLAC__uint32)(total_samples * channels * (bps/8)); + size_t i; + + (void)decoder; + + if(total_samples == 0) { + fprintf(stderr, "ERROR: this example only works for FLAC files that have a total_samples count in STREAMINFO\n"); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + if(channels != 2 || bps != 16) { + fprintf(stderr, "ERROR: this example only supports 16bit stereo streams\n"); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + if(frame->header.channels != 2) { + fprintf(stderr, "ERROR: This frame contains %u channels (should be 2)\n", frame->header.channels); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + if(buffer [0] == NULL) { + fprintf(stderr, "ERROR: buffer [0] is NULL\n"); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + if(buffer [1] == NULL) { + fprintf(stderr, "ERROR: buffer [1] is NULL\n"); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + + /* write WAVE header before we write the first frame */ + if(frame->header.number.sample_number == 0) { + if( + fwrite("RIFF", 1, 4, f) < 4 || + !write_little_endian_uint32(f, total_size + 36) || + fwrite("WAVEfmt ", 1, 8, f) < 8 || + !write_little_endian_uint32(f, 16) || + !write_little_endian_uint16(f, 1) || + !write_little_endian_uint16(f, (FLAC__uint16)channels) || + !write_little_endian_uint32(f, sample_rate) || + !write_little_endian_uint32(f, sample_rate * channels * (bps/8)) || + !write_little_endian_uint16(f, (FLAC__uint16)(channels * (bps/8))) || /* block align */ + !write_little_endian_uint16(f, (FLAC__uint16)bps) || + fwrite("data", 1, 4, f) < 4 || + !write_little_endian_uint32(f, total_size) + ) { + fprintf(stderr, "ERROR: write error\n"); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + } + + /* write decoded PCM samples */ + for(i = 0; i < frame->header.blocksize; i++) { + if( + !write_little_endian_int16(f, (FLAC__int16)buffer[0][i]) || /* left channel */ + !write_little_endian_int16(f, (FLAC__int16)buffer[1][i]) /* right channel */ + ) { + fprintf(stderr, "ERROR: write error\n"); + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + } + + return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; +} + +void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) +{ + (void)decoder, (void)client_data; + + /* print some stats */ + if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) { + /* save for later */ + total_samples = metadata->data.stream_info.total_samples; + sample_rate = metadata->data.stream_info.sample_rate; + channels = metadata->data.stream_info.channels; + bps = metadata->data.stream_info.bits_per_sample; + + fprintf(stderr, "sample rate : %u Hz\n", sample_rate); + fprintf(stderr, "channels : %u\n", channels); + fprintf(stderr, "bits per sample: %u\n", bps); + fprintf(stderr, "total samples : %" PRIu64 "\n", total_samples); + } +} + +void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) +{ + (void)decoder, (void)client_data; + + fprintf(stderr, "Got error callback: %s\n", FLAC__StreamDecoderErrorStatusString[status]); +} |