2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file oggdec_filter.c Paraslash's ogg vorbis decoder. */
10 #include <vorbis/vorbisfile.h>
14 #include "oggdec_filter.cmdline.h"
18 #include "buffer_tree.h"
23 /** Determine byte sex. */
24 #ifdef WORDS_BIGENDIAN
30 /** Data specific to the oggdec filter. */
31 struct private_oggdec_data {
32 /** Describes an ogg vorbis file. */
34 /** The number of bytes consumed from the input buffer. */
36 /** When to start producing output. */
37 struct timeval stream_start;
38 /** The number of channels of the current stream. */
39 unsigned int channels;
40 /** Current sample rate in Hz. */
41 unsigned int samplerate;
44 static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
46 struct filter_node *fn = datasource;
47 struct private_oggdec_data *pod = fn->private_data;
48 struct btr_node *btrn = fn->btrn;
50 size_t nbytes = btr_next_buffer(btrn, &btr_buf), tmp;
53 * oggvorbis always uses size == 1. Other sizes would complicate the code
54 * for no real gain. So we simply don't support size != 1.
57 assert(pod->converted <= nbytes);
58 tmp = nbytes - pod->converted;
59 PARA_DEBUG_LOG("vorbis requests %zu bytes have %zu\n", nmemb, tmp);
60 tmp = PARA_MIN(tmp, nmemb);
63 memcpy(buf, btr_buf + pod->converted, tmp);
64 pod->converted += tmp;
69 * Custom data seeking function.
71 * Since we want the data source to be treated as unseekable at all
72 * times, the provided seek callback always returns -1 (failure).
74 static int cb_seek(__a_unused void *datasource, __a_unused ogg_int64_t offset,
75 __a_unused int whence)
80 static int cb_close(__a_unused void *datasource)
85 static const ov_callbacks ovc = {
88 .close_func = cb_close,
90 * The tell function need not be provided if the data IO abstraction is
96 static void ogg_open(struct filter_node *fn)
98 struct private_oggdec_data *pod = para_calloc(
99 sizeof(struct private_oggdec_data));
101 fn->private_data = pod;
105 static void ogg_close(struct filter_node *fn)
107 struct private_oggdec_data *pod = fn->private_data;
109 PARA_DEBUG_LOG("ov_clearing %p, pod = %p\n", pod->vf, pod);
114 PARA_DEBUG_LOG("nothing to close\n");
115 free(fn->private_data);
116 fn->private_data = NULL;
119 #define OGGDEC_OUTPUT_CHUNK_SIZE (64 * 1024)
121 static int oggdec_execute(struct btr_node *btrn, const char *cmd, char **result)
123 struct filter_node *fn = btr_context(btrn);
124 struct private_oggdec_data *pod = fn->private_data;
126 if (!strcmp(cmd, "samplerate")) {
127 if (pod->samplerate == 0)
128 return -ERRNO_TO_PARA_ERROR(ENAVAIL);
129 *result = make_message("%u", pod->samplerate);
132 if (!strcmp(cmd, "channels")) {
133 if (pod->channels == 0)
134 return -ERRNO_TO_PARA_ERROR(ENAVAIL);
135 *result = make_message("%u", pod->channels);
138 return -ERRNO_TO_PARA_ERROR(ENOTSUP);
141 static int ogg_init(struct filter_node *fn)
143 struct private_oggdec_data *pod = fn->private_data;
144 struct btr_node *btrn = fn->btrn;
147 struct timeval delay = {0, 500 * 1000};
149 pod->vf = para_malloc(sizeof(struct OggVorbis_File));
150 PARA_NOTICE_LOG("iqs: %zu, min_iqs: %zu, opening ov callbacks\n",
151 btr_get_input_queue_size(btrn), fn->min_iqs);
153 oret = ov_open_callbacks(fn, pod->vf,
154 NULL, /* no initial buffer */
155 0, /* no initial bytes */
156 ovc); /* the ov_open_callbacks */
157 if (oret == OV_ENOTVORBIS || oret == OV_EBADHEADER) {
158 /* this might be due to the input buffer being too small */
159 if (!btr_no_parent(btrn)) {
161 iqs = btr_get_input_queue_size(btrn);
163 if (iqs < fn->min_iqs)
165 PARA_CRIT_LOG("iqs: %zu\n", iqs);
166 btr_merge(btrn, fn->min_iqs);
170 ret = (oret == OV_ENOTVORBIS)?
171 -E_OGGDEC_NOTVORBIS : -E_OGGDEC_BADHEADER;
174 ret = -E_OGGDEC_READ;
175 if (oret == OV_EREAD)
177 ret = -E_OGGDEC_VERSION;
178 if (oret == OV_EVERSION)
180 ret = -E_OGGDEC_FAULT;
183 pod->channels = ov_info(pod->vf, 0)->channels;
184 pod->samplerate = ov_info(pod->vf, 0)->rate;
185 PARA_NOTICE_LOG("%d channels, %d Hz\n", pod->channels,
187 /* wait a bit to avoid buffer underruns */
188 tv_add(now, &delay, &pod->stream_start);
195 btr_consume(btrn, pod->converted);
202 static void ogg_post_select(__a_unused struct sched *s, struct task *t)
204 struct filter_node *fn = container_of(t, struct filter_node, task);
205 struct private_oggdec_data *pod = fn->private_data;
206 struct btr_node *btrn = fn->btrn;
213 ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
216 btr_merge(btrn, fn->min_iqs);
217 len = btr_next_buffer(btrn, &in);
218 iqs = btr_get_input_queue_size(btrn);
225 char *out = para_malloc(OGGDEC_OUTPUT_CHUNK_SIZE);
226 ssize_t read_ret = ov_read(pod->vf, out, OGGDEC_OUTPUT_CHUNK_SIZE,
227 ENDIAN, 2 /* 16 bit */, 1 /* signed */, NULL);
228 btr_consume(btrn, pod->converted);
233 if (btr_no_parent(btrn))
240 if (read_ret == OV_HOLE)
242 ret = -E_OGGDEC_BADLINK;
245 btr_add_output(out, read_ret, btrn);
246 if (btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL) == 0)
247 return; /* enough data for the moment */
252 btr_remove_node(btrn);
256 static int oggdec_parse_config(int argc, char **argv, void **config)
259 struct oggdec_filter_args_info *ogg_conf;
261 ogg_conf = para_calloc(sizeof(*ogg_conf));
262 ret = -E_OGGDEC_SYNTAX;
263 if (oggdec_cmdline_parser(argc, argv, ogg_conf))
265 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
266 if (ogg_conf->bufsize_arg < 0)
268 if (ogg_conf->bufsize_arg >= INT_MAX / 1024)
270 if (ogg_conf->initial_buffer_arg < 0)
272 if (ogg_conf->initial_buffer_arg >= INT_MAX / 1024)
281 static void oggdec_free_config(void *conf)
283 oggdec_cmdline_parser_free(conf);
287 * The init function of the ogg vorbis decoder.
289 * \param f Its fields are filled in by the function.
291 void oggdec_filter_init(struct filter *f)
293 struct oggdec_filter_args_info dummy;
295 oggdec_cmdline_parser_init(&dummy);
297 f->close = ogg_close;
298 f->pre_select = generic_filter_pre_select;
299 f->post_select = ogg_post_select;
300 f->parse_config = oggdec_parse_config;
301 f->free_config = oggdec_free_config;
302 f->execute = oggdec_execute;
303 f->help = (struct ggo_help) {
304 .short_help = oggdec_filter_args_info_help,
305 .detailed_help = oggdec_filter_args_info_detailed_help