diff options
Diffstat (limited to 'flow/gsl/gslloader-oggvorbis.c')
| -rw-r--r-- | flow/gsl/gslloader-oggvorbis.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/flow/gsl/gslloader-oggvorbis.c b/flow/gsl/gslloader-oggvorbis.c new file mode 100644 index 0000000..3ec3d88 --- /dev/null +++ b/flow/gsl/gslloader-oggvorbis.c @@ -0,0 +1,178 @@ +/* GSL - Generic Sound Layer + * Copyright (C) 1998, 2000, 2001 Tim Janik + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General + * Public License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307, USA. + */ +#include "gsl/gslloader.h" + +#if GSL_HAVE_OGGVORBIS +#include <gsl/gsldatahandle.h> +#include "gsldatahandle-vorbis.h" + +#include <vorbis/vorbisfile.h> +#include <string.h> +#include <unistd.h> + + +/* --- structures --- */ +typedef struct +{ + GslWaveFileInfo wfi; + OggVorbis_File ofile; +} FileInfo; + + +/* --- functions --- */ +static GslWaveFileInfo* +oggv_load_file_info (gpointer data, + const gchar *file_name, + GslErrorType *error_p) +{ + FileInfo *fi = gsl_new_struct0 (FileInfo, 1); + FILE *file; + gint err, i; + + file = fopen (file_name, "r"); + if (!file) + { + *error_p = GSL_ERROR_OPEN_FAILED; + return NULL; + } + + fi = gsl_new_struct0 (FileInfo, 1); + err = ov_open (file, &fi->ofile, NULL, 0); + if (err) + { + fclose (file); + gsl_delete_struct (FileInfo, fi); + *error_p = GSL_ERROR_CODEC_FAILURE; + return NULL; + } + + fi->wfi.n_waves = ov_streams (&fi->ofile); + fi->wfi.waves = g_malloc0 (sizeof (fi->wfi.waves[0]) * fi->wfi.n_waves); + for (i = 0; i < fi->wfi.n_waves; i++) + { + vorbis_comment *vc = ov_comment (&fi->ofile, i); + guint n; + + for (n = 0; n < vc->comments; n++) + if (strcmp (vc->user_comments[n], "title=") == 0) + break; + if (n < vc->comments) + fi->wfi.waves[i].name = g_strdup (vc->user_comments[n] + 6); + else + fi->wfi.waves[i].name = g_strdup_printf ("Unnamed-%u", i); + } + + return &fi->wfi; +} + +static void +oggv_free_file_info (gpointer data, + GslWaveFileInfo *file_info) +{ + FileInfo *fi = (FileInfo*) file_info; + guint i; + + for (i = 0; i < fi->wfi.n_waves; i++) + g_free (fi->wfi.waves[i].name); + g_free (fi->wfi.waves); + ov_clear (&fi->ofile); + gsl_delete_struct (FileInfo, fi); +} + +static GslWaveDsc* +oggv_load_wave_dsc (gpointer data, + GslWaveFileInfo *file_info, + guint nth_wave, + GslErrorType *error_p) +{ + FileInfo *fi = (FileInfo*) file_info; + GslWaveDsc *wdsc = gsl_new_struct0 (GslWaveDsc, 1); + vorbis_info *vi = ov_info (&fi->ofile, nth_wave); + + wdsc->name = g_strdup (fi->wfi.waves[nth_wave].name); + wdsc->n_channels = vi->channels; + wdsc->n_chunks = 1; + wdsc->chunks = g_new0 (GslWaveChunkDsc, 1); + wdsc->chunks[0].osc_freq = 440.0; /* FIXME */ + wdsc->chunks[0].mix_freq = vi->rate; + wdsc->chunks[0].loader_offset = nth_wave; /* lbitstream */ + + return wdsc; +} + +static void +oggv_free_wave_dsc (gpointer data, + GslWaveDsc *wdsc) +{ + g_free (wdsc->name); + g_free (wdsc->chunks); + gsl_delete_struct (GslWaveDsc, wdsc); +} + +static GslDataHandle* +oggv_create_chunk_handle (gpointer data, + GslWaveDsc *wdsc, + guint nth_chunk, + GslErrorType *error_p) +{ + FileInfo *fi = (FileInfo*) wdsc->file_info; + GslDataHandle *dhandle; + + g_return_val_if_fail (nth_chunk == 0, NULL); + + dhandle = gsl_data_handle_new_ogg_vorbis (fi->wfi.file_name, + wdsc->chunks[0].loader_offset); /* lbitstream */ + if (!dhandle) + *error_p = GSL_ERROR_OPEN_FAILED; + return dhandle; +} + +void +_gsl_init_loader_oggvorbis (void) +{ + static const gchar *file_exts[] = { "ogg", NULL, }; + static const gchar *mime_types[] = { "application/x-ogg", "audio/x-vorbis", "audio/x-ogg", NULL, }; + static const gchar *magics[] = { "0 string OggS\n" "29 string vorbis", NULL, }; + static GslLoader loader = { + "Ogg/Vorbis", + file_exts, + mime_types, + magics, + 0, /* priority */ + NULL, + oggv_load_file_info, + oggv_free_file_info, + oggv_load_wave_dsc, + oggv_free_wave_dsc, + oggv_create_chunk_handle, + }; + static gboolean initialized = FALSE; + + g_assert (initialized == FALSE); + initialized = TRUE; + + gsl_loader_register (&loader); +} +#else +void +_gsl_init_loader_oggvorbis (void) +{ + /* dummy */ +} +#endif /* GSL_HAVE_OGGVORBIS */ |