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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
#ifndef DEPENDENCY_AUDIO_DECODE_MP3
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// Stubs:
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//(none required)
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#else
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extern "C" {
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# ifdef QB64_BACKSLASH_FILESYSTEM
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# include "src\\minimp3.h"
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# else
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# include "src/minimp3.h"
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# endif
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}
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snd_sequence_struct *snd_decode_mp3(uint8 *buffer, int32 bytes) {
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mp3_decoder_t mp3;
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mp3_info_t info;
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memset(&info, 0, sizeof(mp3_info_t));
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unsigned char *stream_pos;
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int bytes_left;
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int bytes_read;
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int sample_buffer_allocated_bytes = 2000000;
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int16 *sample_buffer = (int16 *)malloc(2000000);
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int16 *sample_buffer_offset;
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bytes_left = bytes;
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stream_pos = (unsigned char *)buffer;
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mp3 = mp3_create();
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int bytes_out = 0;
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int firstTry = 1;
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sample_buffer_offset = sample_buffer;
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mp3getmore:
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bytes_read = mp3_decode((void **)mp3, stream_pos, bytes_left, sample_buffer_offset, &info);
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if (firstTry == 1 && info.audio_bytes <= 0) {
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free(sample_buffer);
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return NULL;
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}
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firstTry = 0;
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bytes_left -= bytes_read;
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stream_pos += bytes_read;
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sample_buffer_offset = (int16 *)(((uint8 *)sample_buffer_offset) + info.audio_bytes);
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bytes_out += info.audio_bytes;
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if (bytes_out + 1000000 > sample_buffer_allocated_bytes) {
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sample_buffer_allocated_bytes += 1000000;
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sample_buffer = (int16 *)realloc(sample_buffer, sample_buffer_allocated_bytes);
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sample_buffer_offset = (int16 *)(((uint8 *)sample_buffer) + bytes_out);
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}
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if (bytes_left > 0 && bytes_read != 0)
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goto mp3getmore;
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// attach bufout to new sequence
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static int32 seq_handle;
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seq_handle = list_add(snd_sequences);
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static snd_sequence_struct *seq;
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seq = (snd_sequence_struct *)list_get(snd_sequences, seq_handle);
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memset(seq, 0, sizeof(snd_sequence_struct));
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seq->references = 1;
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seq->data = (uint16 *)sample_buffer;
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seq->data_size = bytes_out;
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seq->channels = info.channels;
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seq->endian = 0; // native
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seq->is_unsigned = 0;
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seq->sample_rate = info.sample_rate;
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seq->bits_per_sample = 16;
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return seq;
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}
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#endif
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