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59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
#ifndef _ZSND_STREAMFILE_H_
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#define _ZSND_STREAMFILE_H_
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#include "../streamfile.h"
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typedef struct {
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off_t max_offset;
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} zsnd_io_data;
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static size_t zsnd_io_read(STREAMFILE *streamfile, uint8_t *dest, off_t offset, size_t length, zsnd_io_data* data) {
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size_t bytes_read, bytes_to_do;
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int i;
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/* clamp reads */
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bytes_to_do = length;
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if (offset > data->max_offset)
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offset = data->max_offset;
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if (offset + length > data->max_offset)
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bytes_to_do = data->max_offset - offset;
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bytes_read = streamfile->read(streamfile, dest, offset, bytes_to_do);
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/* pretend we got data after max_offset */
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if (bytes_read < length) {
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for (i = bytes_read; i < length; i++) {
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dest[i] = 0;
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}
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bytes_read = length;
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}
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return bytes_read;
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}
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/* ZSND removes last interleave data from the file if blank, but codecs still need to read after it.
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* This data could be from next stream or from EOF, so return blank data instead. */
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static STREAMFILE* setup_zsnd_streamfile(STREAMFILE *streamFile, off_t start_offset, size_t stream_size) {
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STREAMFILE *temp_streamFile = NULL, *new_streamFile = NULL;
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zsnd_io_data io_data = {0};
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size_t io_data_size = sizeof(zsnd_io_data);
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io_data.max_offset = start_offset + stream_size;
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/* setup custom streamfile */
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new_streamFile = open_wrap_streamfile(streamFile);
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if (!new_streamFile) goto fail;
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temp_streamFile = new_streamFile;
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new_streamFile = open_io_streamfile(temp_streamFile, &io_data,io_data_size, zsnd_io_read,NULL);
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if (!new_streamFile) goto fail;
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temp_streamFile = new_streamFile;
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return temp_streamFile;
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fail:
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close_streamfile(temp_streamFile);
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return NULL;
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}
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#endif /* _ZSND_STREAMFILE_H_ */
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