almixer_isolated: Isolated/SoundDecoder.c comparison

comparison Isolated/SoundDecoder.c @ 38:71b465ff0622

Added support files.

author	Eric Wing <ewing@anscamobile.com>
date	Thu, 28 Apr 2011 16:22:30 -0700
parents
children	5c9eaf0cc385

comparison

equal deleted inserted replaced

-:b346b6608eab
+:71b465ff0622
+#ifndef ALMIXER_COMPILED_WITH_SDL
+#include "SoundDecoder.h"
+#include "SoundDecoder_Internal.h"
+#include "tErrorLib.h"
+#include "LinkedList.h"
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#ifdef ANDROID_NDK
+#include <android/log.h>
+#endif
+/* A partial shim reimplementation of SDL_sound to work around the LGPL issues.
+* This implementation is more limited than SDL_sound.
+* For example, there is no generic software conversion routines.
+* Functions are also not necessarily thread safe.
+* This implementation relies on the back-end decoder much more heavily
+* than SDL_sound. (For example, I bypass the internal->buffer.)
+*/
+static LinkedList* s_listOfLoadedSamples = NULL;
+static signed char s_isInitialized = 0;
+static TErrorPool* s_errorPool = NULL;
+static const SoundDecoder_DecoderInfo** s_availableDecoders = NULL;
+#ifdef __APPLE__
+//extern const SoundDecoder_DecoderFunctions __SoundDecoder_DecoderFunctions_CoreAudio;
+extern const Sound_DecoderFunctions __Sound_DecoderFunctions_CoreAudio;
+#endif
+#ifdef ANDROID_NDK
+#ifdef SOUND_SUPPORTS_WAV
+extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV;
+#endif
+#ifdef SOUND_SUPPORTS_MPG123
+extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MPG123;
+#endif
+#ifdef SOUND_SUPPORTS_OGG
+extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG;
+#endif
+#endif
+typedef struct
+{
+int available;
+const SoundDecoder_DecoderFunctions* funcs;
+} SoundElement;
+static SoundElement s_linkedDecoders[] =
+{
+#if defined(__APPLE__)
+{ 0, &__Sound_DecoderFunctions_CoreAudio },
+#endif
+#if defined(ANDROID_NDK)
+#ifdef SOUND_SUPPORTS_WAV
+{ 0, &__Sound_DecoderFunctions_WAV },
+#endif
+#ifdef SOUND_SUPPORTS_MPG123
+{ 0, &__Sound_DecoderFunctions_MPG123 },
+#endif
+#ifdef SOUND_SUPPORTS_OGG
+{ 0, &__Sound_DecoderFunctions_OGG },
+#endif
+#endif
+{ 0, NULL }
+};
+#include <ctype.h>
+int SoundDecoder_strcasecmp(const char* str1, const char* str2)
+{
+	int the_char1;
+	int the_char2;
+	int i = 0;
+	if(str1 == str2)
+	{
+		return 0;
+	}
+	if(NULL == str1)
+	{
+		return -1;
+	}
+	if(NULL == str2)
+	{
+		return 1;
+	}
+	do
+	{
+		the_char1 = tolower(str1[i]);
+		the_char2 = tolower(str2[i]);
+		if(the_char1 < the_char2)
+		{
+			return -1;
+		}
+		else if(the_char1 > the_char2)
+		{
+			return 1;
+		}
+		i++;
+	} while( (0 != the_char1) && (0 != the_char2) );
+	return 0;
+}
+#ifdef ANDROID_NDK
+#include <stdarg.h>
+#include <android/log.h>
+int SoundDecoder_DebugPrint(const char* format, ...)
+{
+	va_list arg_list;
+	int ret_val;
+	va_start(arg_list, format);
+	ret_val = __android_log_vprint(ANDROID_LOG_INFO, "SoundDecoder", format, arg_list);
+	va_end(arg_list);
+	return ret_val;
+}
+#endif
+const char* SoundDecoder_GetError()
+{
+	const char* error_string = NULL;
+	if(NULL == s_errorPool)
+	{
+		return "Error: You should not call SoundDecoder_GetError while Sound is not initialized";
+	}
+	error_string = TError_GetLastErrorStr(s_errorPool);
+	/* SDL returns empty strings instead of NULL */
+	if(NULL == error_string)
+	{
+		return "";
+	}
+	else
+	{
+		return error_string;
+	}
+}
+void SoundDecoder_ClearError()
+{
+	if(NULL == s_errorPool)
+	{
+		return;
+	}
+	TError_SetError(s_errorPool, 0, NULL);
+}
+void SoundDecoder_SetError(const char* err_str, ...)
+{
+	if(NULL == s_errorPool)
+	{
+		fprintf(stderr, "Error: You should not call SoundDecoder_SetError while Sound is not initialized\n");
+		return;
+	}
+	va_list argp;
+	va_start(argp, err_str);
+	// SDL_SetError which I'm emulating has no number parameter.
+	TError_SetErrorv(s_errorPool, 1, err_str, argp);
+	va_end(argp);
+#ifdef ANDROID_NDK
+	__android_log_print(ANDROID_LOG_INFO, "SoundDecoder_SetError", TError_GetLastErrorStr(s_errorPool));
+#endif
+}
+void SoundDecoder_GetLinkedVersion(SoundDecoder_Version* the_version)
+{
+	if(NULL != the_version)
+	{
+		the_version->major = SOUNDDECODER_VER_MAJOR;
+		the_version->minor = SOUNDDECODER_VER_MINOR;
+		the_version->patch = SOUNDDECODER_VER_PATCH;
+	}
+}
+const SoundDecoder_DecoderInfo** SoundDecoder_AvailableDecoders()
+{
+return(s_availableDecoders);
+}
+int SoundDecoder_Init()
+{
+	size_t total_number_of_decoders;
+	size_t i;
+	size_t current_pos = 0;
+	if(1 == s_isInitialized)
+	{
+		return 1;
+	}
+	if(NULL == s_errorPool)
+	{
+		s_errorPool = TError_CreateErrorPool();
+	}
+	if(NULL == s_errorPool)
+	{
+		return 0;
+	}
+	total_number_of_decoders = sizeof(s_linkedDecoders) / sizeof(s_linkedDecoders[0]);
+	s_availableDecoders = (const SoundDecoder_DecoderInfo **)malloc((total_number_of_decoders) * sizeof(SoundDecoder_DecoderInfo*));
+	if(NULL == s_availableDecoders)
+	{
+		SoundDecoder_SetError(ERR_OUT_OF_MEMORY);
+		return 0;
+	}
+	/* Allocate memory for linked list of sound samples. */
+	s_listOfLoadedSamples = LinkedList_Create();
+	if(NULL == s_listOfLoadedSamples)
+	{
+		free(s_availableDecoders);
+		s_availableDecoders = NULL;
+		SoundDecoder_SetError(ERR_OUT_OF_MEMORY);
+		return 0;
+	}
+	for(i = 0; s_linkedDecoders[i].funcs != NULL; i++)
+	{
+		s_linkedDecoders[i].available = s_linkedDecoders[i].funcs->init();
+		if(s_linkedDecoders[i].available)
+		{
+			s_availableDecoders[current_pos] = &(s_linkedDecoders[i].funcs->info);
+			current_pos++;
+		}
+	}
+	s_availableDecoders[current_pos] = NULL;
+	s_isInitialized = 1;
+	return 1;
+}
+void SoundDecoder_Quit()
+{
+size_t i;
+	if(0 == s_isInitialized)
+	{
+		return;
+	}
+	/*
+	 * SDL_sound actually embeds the linked list in the internal data structure.
+	 * So any sample can potentially reach any other sample.
+	 * But I'm keeping my own separate list.
+	 */
+	while(LinkedList_Size(s_listOfLoadedSamples) > 0)
+	{
+		SoundDecoder_Sample* sound_sample = (SoundDecoder_Sample*)LinkedList_PopBack(s_listOfLoadedSamples);
+		SoundDecoder_FreeSample(sound_sample);
+	}
+	LinkedList_Free(s_listOfLoadedSamples);
+	s_listOfLoadedSamples = NULL;
+for(i = 0; s_linkedDecoders[i].funcs != NULL; i++)
+{
+if (s_linkedDecoders[i].available)
+{
+s_linkedDecoders[i].funcs->quit();
+s_linkedDecoders[i].available = 0;
+}
+}
+if(NULL != s_availableDecoders)
+	{
+free(s_availableDecoders);
+	}
+	s_availableDecoders = NULL;
+	/* Remember: ALmixer_SetError/GetError calls will not work while this is gone. */
+	TError_FreeErrorPool(s_errorPool);
+	s_errorPool = NULL;
+	s_isInitialized = 0;
+}
+void SoundDecoder_FreeSample(SoundDecoder_Sample* sound_sample)
+{
+	SoundDecoder_SampleInternal* sample_internal;
+	/* Quit unloads all samples, so it is not possible to free a sample
+	 * when not initialized.
+	 */
+	if(0 == s_isInitialized)
+	{
+		return;
+	}
+	if(sound_sample == NULL)
+	{
+		return;
+	}
+	/* SDL_sound keeps a linked list of all the loaded samples.
+	 * We want to remove the current sample from that list.
+	 */
+	LinkedListNode* the_node = LinkedList_Find(s_listOfLoadedSamples, sound_sample, NULL);
+	if(NULL == the_node)
+	{
+		SoundDecoder_SetError("SoundDecoder_FreeSample: Internal Error, sample does not exist in linked list.");
+		return;
+	}
+	LinkedList_Remove(s_listOfLoadedSamples, the_node);
+	sample_internal = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+	/* Ugh...SDL_sound has a lot of pointers.
+	 * I hope I didn't miss any dynamic memory.
+	 */
+	/* Call close on the decoder */
+	sample_internal->funcs->close(sound_sample);
+	if(NULL != sample_internal->rw)
+	{
+		sample_internal->rw->close(sample_internal->rw);
+	}
+	/* Ooops. The public buffer might be shared with the internal buffer.
+	 * Make sure to not accidentally double delete.
+	 */
+	if((NULL != sample_internal->buffer)
+		&& (sample_internal->buffer != sound_sample->buffer)
+	)
+	{
+		free(sample_internal->buffer);
+	}
+	free(sample_internal);
+	if(NULL != sound_sample->buffer)
+	{
+		free(sound_sample->buffer);
+	}
+	free(sound_sample);
+}
+static int Internal_LoadSample(const SoundDecoder_DecoderFunctions *funcs,
+	SoundDecoder_Sample* sound_sample, const char *ext
+)
+{
+SoundDecoder_SampleInternal* internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+long current_file_position = internal_sample->rw->seek(internal_sample->rw, 0, SEEK_CUR);
+/* fill in the funcs for this decoder... */
+sound_sample->decoder = &funcs->info;
+	internal_sample->funcs = funcs;
+	if (!funcs->open(sound_sample, ext))
+	{
+		internal_sample->rw->seek(internal_sample->rw, current_file_position, SEEK_SET);
+		return 0;
+	}
+	/* we found a compatible decoder */
+	/* SDL_sound normally goes on to setup a bunch of things to
+	 * support format conversion via SDL APIs.
+	 * I am not porting any of that stuff.
+	 * My goal is to simply setup the struct properties to values
+	 * that will not cause any confusion with other parts of the implementation.
+	 */
+	if(0 == sound_sample->desired.format)
+	{
+		sound_sample->desired.format = sound_sample->actual.format;
+	}
+	if(0 == sound_sample->desired.channels)
+	{
+		sound_sample->desired.channels = sound_sample->actual.channels;
+	}
+	if(0 == sound_sample->desired.rate)
+	{
+		sound_sample->desired.rate = sound_sample->actual.rate;
+	}
+	/* I'm a little confused at the difference between the internal
+	 * public buffer. I am going to make them the same.
+	 * I assume I already allocated the public buffer.
+	 */
+	internal_sample->buffer = sound_sample->buffer;
+	internal_sample->buffer_size = sound_sample->buffer_size;
+	/* Insert the new sample into the linked list of samples. */
+	LinkedList_PushBack(s_listOfLoadedSamples, sound_sample);
+	return 1;
+}
+SoundDecoder_Sample* SoundDecoder_NewSampleFromFile(const char* file_name,
+SoundDecoder_AudioInfo* desired_format,
+size_t buffer_size)
+{
+const char* file_extension;
+ALmixer_RWops* rw_ops;
+	if(0 == s_isInitialized)
+	{
+		SoundDecoder_SetError(ERR_NOT_INITIALIZED);
+		return NULL;
+	}
+	if(NULL == file_name)
+	{
+		SoundDecoder_SetError("No file specified");
+		return NULL;
+	}
+file_extension = strrchr(file_name, '.');
+	if(NULL != file_extension)
+	{
+file_extension++;
+	}
+rw_ops = ALmixer_RWFromFile(file_name, "rb");
+return SoundDecoder_NewSample(rw_ops, file_extension, desired_format, buffer_size);
+}
+SoundDecoder_Sample* SoundDecoder_NewSample(ALmixer_RWops* rw_ops, const char* file_extension, SoundDecoder_AudioInfo* desired_format, size_t buffer_size)
+{
+SoundDecoder_Sample* new_sample;
+SoundDecoder_SampleInternal* internal_sample;
+SoundElement* current_decoder;
+	if(0 == s_isInitialized)
+	{
+		SoundDecoder_SetError(ERR_NOT_INITIALIZED);
+		return NULL;
+	}
+	if(NULL == rw_ops)
+	{
+		SoundDecoder_SetError("No file specified");
+		return NULL;
+	}
+	new_sample = (SoundDecoder_Sample*)calloc(1, sizeof(SoundDecoder_Sample));
+	if(NULL == new_sample)
+	{
+		SoundDecoder_SetError(ERR_OUT_OF_MEMORY);
+		return NULL;
+	}
+	internal_sample = (SoundDecoder_SampleInternal*)calloc(1, sizeof(SoundDecoder_SampleInternal));
+	if(NULL == internal_sample)
+	{
+		free(new_sample);
+		SoundDecoder_SetError(ERR_OUT_OF_MEMORY);
+		return NULL;
+	}
+	new_sample->buffer = calloc(1, buffer_size);
+	if(NULL == new_sample->buffer)
+	{
+		free(internal_sample);
+		free(new_sample);
+		SoundDecoder_SetError(ERR_OUT_OF_MEMORY);
+		return NULL;
+	}
+	new_sample->buffer_size = buffer_size;
+if(NULL != desired_format)
+	{
+		memcpy(&new_sample->desired, desired_format, sizeof(SoundDecoder_AudioInfo));
+	}
+	internal_sample->rw = rw_ops;
+	new_sample->opaque = internal_sample;
+if(NULL != file_extension)
+{
+for(current_decoder = &s_linkedDecoders[0]; current_decoder->funcs != NULL; current_decoder++)
+{
+if(current_decoder->available)
+{
+const char** decoder_file_extension = current_decoder->funcs->info.extensions;
+while(*decoder_file_extension)
+{
+if(0 == (SoundDecoder_strcasecmp(*decoder_file_extension, file_extension)))
+{
+if(Internal_LoadSample(current_decoder->funcs, new_sample, file_extension))
+						{
+							return(new_sample);
+						}
+break;  /* go to the next decoder */
+}
+					decoder_file_extension++;
+}
+}
+}
+}
+/* no direct file_extensionension match? Try everything we've got... */
+	for(current_decoder = &s_linkedDecoders[0]; current_decoder->funcs != NULL; current_decoder++)
+	{
+		if(current_decoder->available)
+		{
+			int already_tried_decoder = 0;
+			const char** decoder_file_extension = current_decoder->funcs->info.extensions;
+			/* skip decoders we already tried from the above loop */
+			while(*decoder_file_extension)
+			{
+				if(SoundDecoder_strcasecmp(*decoder_file_extension, file_extension) == 0)
+				{
+					already_tried_decoder = 1;
+					break;
+				}
+				decoder_file_extension++;
+			}
+			if(0 == already_tried_decoder)
+			{
+				if (Internal_LoadSample(current_decoder->funcs, new_sample, file_extension))
+				{
+					return new_sample;
+				}
+			}
+		}
+	}
+	/* could not find a decoder */
+	SoundDecoder_SetError(ERR_UNSUPPORTED_FORMAT);
+	/* clean up the memory */
+	free(new_sample->opaque);
+	if(NULL != new_sample->buffer)
+	{
+		free(new_sample->buffer);
+	}
+	free(new_sample);
+	rw_ops->close(rw_ops);
+	return NULL;
+}
+int SoundDecoder_SetBufferSize(SoundDecoder_Sample* sound_sample, size_t new_buffer_size)
+{
+	SoundDecoder_SampleInternal* internal_sample = NULL;
+	void* new_buffer_ptr = NULL;
+BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0);
+	BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0);
+internal_sample = ((SoundDecoder_SampleInternal*)sound_sample->opaque);
+new_buffer_ptr = realloc(sound_sample->buffer, new_buffer_size);
+BAIL_IF_MACRO(NULL == new_buffer_ptr, ERR_OUT_OF_MEMORY, 0);
+	sound_sample->buffer = new_buffer_ptr;
+sound_sample->buffer_size = new_buffer_size;
+	internal_sample->buffer = sound_sample->buffer;
+	internal_sample->buffer_size = sound_sample->buffer_size;
+return 1;
+}
+size_t SoundDecoder_Decode(SoundDecoder_Sample* sound_sample)
+{
+SoundDecoder_SampleInternal* internal_sample = NULL;
+size_t bytes_read = 0;
+BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0);
+	BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0);
+	BAIL_IF_MACRO(sound_sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREVIOUS_SAMPLE_ERROR, 0);
+	BAIL_IF_MACRO(sound_sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_ALREADY_AT_EOF_ERROR, 0);
+internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+assert(sound_sample->buffer != NULL);
+assert(sound_sample->buffer_size > 0);
+assert(internal_sample->buffer != NULL);
+assert(internal_sample->buffer_size > 0);
+	/* reset EAGAIN. Decoder can flip it back on if it needs to. */
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN;
+bytes_read = internal_sample->funcs->read(sound_sample);
+return bytes_read;
+}
+size_t SoundDecoder_DecodeAll(SoundDecoder_Sample* sound_sample)
+{
+SoundDecoder_SampleInternal* internal_sample = NULL;
+void* data_buffer = NULL;
+size_t updated_buffer_size = 0;
+BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0);
+	BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0);
+	/* My original thought was to call SetBufferSize and resize to
+	 * the size needed to hold the entire decoded file utilizing total_time,
+	 * but it appears SDL_sound simply loops on SoundDecoder_Decode.
+	 * I suppose it is possible to partially decode or seek a file, and then
+	 * call DecodeAll so you won't have the whole thing in which case
+	 * my idea would waste memory.
+	 */
+while( (0 == (sound_sample->flags & SOUND_SAMPLEFLAG_EOF) )
+		&& (0 == (sound_sample->flags & SOUND_SAMPLEFLAG_ERROR))
+	)
+{
+size_t bytes_decoded = SoundDecoder_Decode(sound_sample);
+void* realloced_ptr = realloc(data_buffer, updated_buffer_size + bytes_decoded);
+if(NULL == realloced_ptr)
+{
+sound_sample->flags |= SOUND_SAMPLEFLAG_ERROR;
+SoundDecoder_SetError(ERR_OUT_OF_MEMORY);
+			if(NULL != data_buffer)
+			{
+				free(data_buffer);
+			}
+			return bytes_decoded;
+}
+		data_buffer = realloced_ptr;
+		/* copy the chunk of decoded PCM to the end of our new data buffer */
+		memcpy( ((char*)data_buffer) + updated_buffer_size, sound_sample->buffer, bytes_decoded );
+		updated_buffer_size += bytes_decoded;
+}
+internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+	if(internal_sample->buffer != sound_sample->buffer)
+	{
+		free(internal_sample->buffer);
+	}
+free(sound_sample->buffer);
+	sound_sample->buffer = data_buffer;
+	sound_sample->buffer_size = updated_buffer_size;
+	internal_sample->buffer = sound_sample->buffer;
+	internal_sample->buffer_size = sound_sample->buffer_size;
+return sound_sample->buffer_size;
+}
+int SoundDecoder_Rewind(SoundDecoder_Sample* sound_sample)
+{
+SoundDecoder_SampleInternal* internal_sample;
+	int ret_val;
+BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0);
+	BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0);
+internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+	ret_val = internal_sample->funcs->rewind(sound_sample);
+if(0 == ret_val)
+{
+sound_sample->flags |= SOUND_SAMPLEFLAG_ERROR;
+		SoundDecoder_SetError("Rewind failed");
+return 0;
+}
+	/* reset flags */
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN;
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_ERROR;
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_EOF;
+return 1;
+}
+int SoundDecoder_Seek(SoundDecoder_Sample* sound_sample, size_t ms)
+{
+SoundDecoder_SampleInternal* internal_sample;
+	int ret_val;
+BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0);
+	BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0);
+	BAIL_IF_MACRO(!(sound_sample->flags & SOUND_SAMPLEFLAG_CANSEEK), "Sound sample is not seekable", 0);
+internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+	ret_val = internal_sample->funcs->seek(sound_sample, ms);
+	if(0 == ret_val)
+	{
+sound_sample->flags |= SOUND_SAMPLEFLAG_ERROR;
+		SoundDecoder_SetError("Seek failed");
+		return 0;
+	}
+	/* reset flags */
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN;
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_ERROR;
+sound_sample->flags &= ~SOUND_SAMPLEFLAG_EOF;
+return 1;
+}
+ptrdiff_t SoundDecoder_GetDuration(SoundDecoder_Sample* sound_sample)
+{
+SoundDecoder_SampleInternal* internal_sample;
+BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, -1);
+	BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0);
+internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque;
+return internal_sample->total_time;
+}
+#endif

Mercurial > almixer_isolated

comparison Isolated/SoundDecoder.c @ 38:71b465ff0622