+++ /dev/null
-/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-
-/** \file oggdec.c Paraslash's ogg vorbis decoder. */
-
-#include "para.h"
-
-#include "oggdec_filter.cmdline.h"
-#include "list.h"
-#include "sched.h"
-#include "filter.h"
-#include "error.h"
-#include "string.h"
-
-#include <vorbis/vorbisfile.h>
-
-/** Determine byte sex. */
-#ifdef WORDS_BIGENDIAN
-#define ENDIAN 1
-#else
-#define ENDIAN 0
-#endif
-
-/** Data specific to the oggdec filter. */
-struct private_oggdec_data {
- /** Describes an ogg vorbis file. */
- OggVorbis_File *vf;
- /** The input buffer. */
- char *inbuf;
- /** The length of \a inbuf. */
- size_t inbuf_len;
- /** The number of bytes consumed from the input buffer. */
- size_t converted;
-};
-
-static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
-{
- struct filter_node *fn = datasource;
- struct private_oggdec_data *pod = fn->private_data;
- size_t ret, have = pod->inbuf_len - pod->converted;
- char *p = pod->inbuf + pod->converted;
-
-// PARA_DEBUG_LOG("pod = %p\n", pod);
-// PARA_DEBUG_LOG("vorbis requests %d bytes, have %d\n", size * nmemb, have);
- if (pod->inbuf_len < size) {
- if (*fn->fc->input_error)
- return 0;
- errno = EAGAIN;
- return (size_t)-1;
- }
- ret = PARA_MIN(nmemb, have / size) * size;
- memcpy(buf, p, ret);
- pod->converted += ret;
- return ret;
-}
-
-/*
- * Custom data seeking function.
- *
- * Since we want the data source to be treated as unseekable at all
- * times, the provided seek callback always returns -1 (failure).
- */
-static int cb_seek(__a_unused void *datasource, __a_unused ogg_int64_t offset,
- __a_unused int whence)
-{
- return -1;
-}
-
-static int cb_close(__a_unused void *datasource)
-{
- return 0;
-}
-
-static const ov_callbacks ovc = {
- .read_func = cb_read,
- .seek_func = cb_seek,
- .close_func = cb_close,
- /*
- * The tell function need not be provided if the data IO abstraction is
- * not seekable
- */
- .tell_func = NULL
-};
-
-static void ogg_open(struct filter_node *fn)
-{
- struct private_oggdec_data *pod = para_calloc(
- sizeof(struct private_oggdec_data));
- struct oggdec_filter_args_info *conf = fn->conf;
-
- fn->private_data = pod;
- fn->bufsize = conf->bufsize_arg * 1024;
- fn->buf = para_malloc(fn->bufsize);
-}
-
-static void ogg_close(struct filter_node *fn)
-{
- struct private_oggdec_data *pod = fn->private_data;
- if (pod->vf) {
- PARA_DEBUG_LOG("ov_clearing %p, pod = %p\n", pod->vf, pod);
- ov_clear(pod->vf);
- free(pod->vf);
- pod->vf = NULL;
- } else
- PARA_DEBUG_LOG("nothing to close in fc %p, pod = %p\n", pod->vf, pod);
- free(fn->buf);
- fn->buf = NULL;
- free(fn->private_data);
- fn->private_data = NULL;
-}
-
-static ssize_t ogg_convert(char *inbuffer, size_t len, struct filter_node *fn)
-{
- ssize_t ret;
- struct private_oggdec_data *pod = fn->private_data;
- struct oggdec_filter_args_info *conf = fn->conf;
- /* make the buffer known to the read callback cb_read() */
- pod->inbuf = inbuffer;
- pod->inbuf_len = len;
- pod->converted = 0;
-
- if (!pod->vf) {
- int ib = 1024 * conf->initial_buffer_arg; /* initial buffer */
- if (len <ib && !*fn->fc->input_error) {
- PARA_DEBUG_LOG("initial input buffer %zd/%d, "
- "waiting for more data\n", len, ib);
- return 0;
- }
- pod->vf = para_malloc(sizeof(struct OggVorbis_File));
- PARA_NOTICE_LOG("input buffer: %zd, opening ov callbacks\n", len);
- ret = ov_open_callbacks(fn, pod->vf,
- NULL, /* no initial buffer */
- 0, /* no initial bytes */
- ovc); /* the ov_open_callbacks */
- if (ret == OV_EREAD)
- return -E_OGGDEC_READ;
- if (ret == OV_ENOTVORBIS)
- return -E_OGGDEC_NOTVORBIS;
- if (ret == OV_EVERSION)
- return -E_OGGDEC_VERSION;
- if (ret == OV_EBADHEADER)
- return -E_OGGDEC_BADHEADER;
- if (ret < 0)
- return -E_OGGDEC_FAULT;
- fn->fc->channels = ov_info(pod->vf, 0)->channels;
- fn->fc->samplerate = ov_info(pod->vf, 0)->rate;
- PARA_NOTICE_LOG("%d channels, %d Hz\n", fn->fc->channels,
- fn->fc->samplerate);
- }
- while (fn->loaded < fn->bufsize) {
- int length = fn->bufsize - fn->loaded;
- long read_ret = ov_read(pod->vf, fn->buf + fn->loaded, length,
- ENDIAN, 2 /* 16 bit */, 1 /* signed */, NULL);
- if (read_ret == OV_HOLE || !read_ret)
- return pod->converted;
- if (read_ret < 0)
- return -E_OGGDEC_BADLINK;
- fn->loaded += read_ret;
- }
- return pod->converted;
-}
-
-static int oggdec_parse_config(int argc, char **argv, void **config)
-{
- int ret;
- struct oggdec_filter_args_info *ogg_conf;
-
- ogg_conf = para_calloc(sizeof(*ogg_conf));
- ret = -E_OGGDEC_SYNTAX;
- if (oggdec_cmdline_parser(argc, argv, ogg_conf))
- goto err;
- ret = -ERRNO_TO_PARA_ERROR(EINVAL);
- if (ogg_conf->bufsize_arg < 0)
- goto err;
- if (ogg_conf->bufsize_arg >= INT_MAX / 1024)
- goto err;
- if (ogg_conf->initial_buffer_arg < 0)
- goto err;
- if (ogg_conf->initial_buffer_arg >= INT_MAX / 1024)
- goto err;
- *config = ogg_conf;
- return 1;
-err:
- free(ogg_conf);
- return ret;
-}
-
-/**
- * The init function of the ogg vorbis decoder.
- *
- * \param f Its fields are filled in by the function.
- */
-void oggdec_filter_init(struct filter *f)
-{
- f->open = ogg_open;
- f->close = ogg_close;
- f->convert = ogg_convert;
- f->print_help = oggdec_cmdline_parser_print_help;
- f->parse_config = oggdec_parse_config;
-}
projects / paraslash.git / blobdiff