file_encoder.c

这是著名的TCPMP播放器在WINDWOWS,和WINCE下编译通过的源程序.笔者对其中的LIBMAD库做了针对ARM MPU的优化. 并增加了词幕功能.

/* libFLAC - Free Lossless Audio Codec library
 * Copyright (C) 2002,2003,2004,2005  Josh Coalson
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Xiph.org Foundation nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h> /* for malloc() */
#include <string.h> /* for strlen(), strcpy() */
#include "FLAC/assert.h"
#include "protected/file_encoder.h"

#ifdef max
#undef max
#endif
#define max(x,y) ((x)>(y)?(x):(y))

/***********************************************************************
 *
 * Private class method prototypes
 *
 ***********************************************************************/

/* unpublished debug routines */
extern FLAC__bool FLAC__seekable_stream_encoder_disable_constant_subframes(FLAC__SeekableStreamEncoder *encoder, FLAC__bool value);
extern FLAC__bool FLAC__seekable_stream_encoder_disable_fixed_subframes(FLAC__SeekableStreamEncoder *encoder, FLAC__bool value);
extern FLAC__bool FLAC__seekable_stream_encoder_disable_verbatim_subframes(FLAC__SeekableStreamEncoder *encoder, FLAC__bool value);

static void set_defaults_(FLAC__FileEncoder *encoder);
static FLAC__SeekableStreamEncoderSeekStatus seek_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
static FLAC__SeekableStreamEncoderTellStatus tell_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
static FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);

/***********************************************************************
 *
 * Private class data
 *
 ***********************************************************************/

typedef struct FLAC__FileEncoderPrivate {
	FLAC__FileEncoderProgressCallback progress_callback;
	void *client_data;
	char *filename;
	FLAC__uint64 bytes_written;
	FLAC__uint64 samples_written;
	unsigned frames_written;
	unsigned total_frames_estimate;
	FLAC__SeekableStreamEncoder *seekable_stream_encoder;
	FILE *file;
} FLAC__FileEncoderPrivate;

/***********************************************************************
 *
 * Public static class data
 *
 ***********************************************************************/

FLAC_API const char * const FLAC__FileEncoderStateString[] = {
	"FLAC__FILE_ENCODER_OK",
	"FLAC__FILE_ENCODER_NO_FILENAME",
	"FLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR",
	"FLAC__FILE_ENCODER_FATAL_ERROR_WHILE_WRITING",
	"FLAC__FILE_ENCODER_ERROR_OPENING_FILE",
	"FLAC__FILE_ENCODER_MEMORY_ALLOCATION_ERROR",
	"FLAC__FILE_ENCODER_ALREADY_INITIALIZED",
	"FLAC__FILE_ENCODER_UNINITIALIZED"
};


/***********************************************************************
 *
 * Class constructor/destructor
 *
 ***********************************************************************/

FLAC_API FLAC__FileEncoder *FLAC__file_encoder_new()
{
	FLAC__FileEncoder *encoder;

	FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */

	encoder = (FLAC__FileEncoder*)calloc(1, sizeof(FLAC__FileEncoder));
	if(encoder == 0) {
		return 0;
	}

	encoder->protected_ = (FLAC__FileEncoderProtected*)calloc(1, sizeof(FLAC__FileEncoderProtected));
	if(encoder->protected_ == 0) {
		free(encoder);
		return 0;
	}

	encoder->private_ = (FLAC__FileEncoderPrivate*)calloc(1, sizeof(FLAC__FileEncoderPrivate));
	if(encoder->private_ == 0) {
		free(encoder->protected_);
		free(encoder);
		return 0;
	}

	encoder->private_->seekable_stream_encoder = FLAC__seekable_stream_encoder_new();
	if(0 == encoder->private_->seekable_stream_encoder) {
		free(encoder->private_);
		free(encoder->protected_);
		free(encoder);
		return 0;
	}

	encoder->private_->file = 0;

	set_defaults_(encoder);

	encoder->protected_->state = FLAC__FILE_ENCODER_UNINITIALIZED;

	return encoder;
}

FLAC_API void FLAC__file_encoder_delete(FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->protected_);
	FLAC__ASSERT(0 != encoder->private_);
	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);

	(void)FLAC__file_encoder_finish(encoder);

	FLAC__seekable_stream_encoder_delete(encoder->private_->seekable_stream_encoder);

	free(encoder->private_);
	free(encoder->protected_);
	free(encoder);
}

/***********************************************************************
 *
 * Public class methods
 *
 ***********************************************************************/

FLAC_API FLAC__FileEncoderState FLAC__file_encoder_init(FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);

	if(encoder->protected_->state != FLAC__FILE_ENCODER_UNINITIALIZED)
		return encoder->protected_->state = FLAC__FILE_ENCODER_ALREADY_INITIALIZED;

	if(0 == encoder->private_->filename)
		return encoder->protected_->state = FLAC__FILE_ENCODER_NO_FILENAME;

	encoder->private_->file = fopen(encoder->private_->filename, "w+b");

	if(encoder->private_->file == 0)
		return encoder->protected_->state = FLAC__FILE_ENCODER_ERROR_OPENING_FILE;

	encoder->private_->bytes_written = 0;
	encoder->private_->samples_written = 0;
	encoder->private_->frames_written = 0;

	FLAC__seekable_stream_encoder_set_seek_callback(encoder->private_->seekable_stream_encoder, seek_callback_);
	FLAC__seekable_stream_encoder_set_tell_callback(encoder->private_->seekable_stream_encoder, tell_callback_);
	FLAC__seekable_stream_encoder_set_write_callback(encoder->private_->seekable_stream_encoder, write_callback_);
	FLAC__seekable_stream_encoder_set_client_data(encoder->private_->seekable_stream_encoder, encoder);

	if(FLAC__seekable_stream_encoder_init(encoder->private_->seekable_stream_encoder) != FLAC__SEEKABLE_STREAM_ENCODER_OK)
		return encoder->protected_->state = FLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR;

	{
		unsigned blocksize = FLAC__file_encoder_get_blocksize(encoder);

		FLAC__ASSERT(blocksize != 0);
		encoder->private_->total_frames_estimate = (unsigned)((FLAC__file_encoder_get_total_samples_estimate(encoder) + blocksize - 1) / blocksize);
	}

	return encoder->protected_->state = FLAC__FILE_ENCODER_OK;
}

FLAC_API void FLAC__file_encoder_finish(FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);

	if(encoder->protected_->state == FLAC__FILE_ENCODER_UNINITIALIZED)
		return;

	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);

	/* FLAC__seekable_stream_encoder_finish() might write data so we must close the file after it. */

	FLAC__seekable_stream_encoder_finish(encoder->private_->seekable_stream_encoder);

	if(0 != encoder->private_->file) {
		fclose(encoder->private_->file);
		encoder->private_->file = 0;
	}

	if(0 != encoder->private_->filename) {
		free(encoder->private_->filename);
		encoder->private_->filename = 0;
	}

	set_defaults_(encoder);

	encoder->protected_->state = FLAC__FILE_ENCODER_UNINITIALIZED;
}

FLAC_API FLAC__bool FLAC__file_encoder_set_verify(FLAC__FileEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	FLAC__ASSERT(0 != encoder->protected_);
	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);
	if(encoder->protected_->state != FLAC__FILE_ENCODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_encoder_set_verify(encoder->private_->seekable_stream_encoder, value);
}

FLAC_API FLAC__bool FLAC__file_encoder_set_streamable_subset(FLAC__FileEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	FLAC__ASSERT(0 != encoder->protected_);
	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);
	if(encoder->protected_->state != FLAC__FILE_ENCODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_encoder_set_streamable_subset(encoder->private_->seekable_stream_encoder, value);
}

FLAC_API FLAC__bool FLAC__file_encoder_set_do_mid_side_stereo(FLAC__FileEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	FLAC__ASSERT(0 != encoder->protected_);
	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);
	if(encoder->protected_->state != FLAC__FILE_ENCODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_encoder_set_do_mid_side_stereo(encoder->private_->seekable_stream_encoder, value);