format_vorbis.c 7.98 KB
Newer Older
Jack Moffitt's avatar
Jack Moffitt committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14
/* format_vorbis.c
**
** format plugin for vorbis
**
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <ogg/ogg.h>
#include <vorbis/codec.h>

#include "refbuf.h"
Michael Smith's avatar
Michael Smith committed
15 16
#include "source.h"
#include "client.h"
Jack Moffitt's avatar
Jack Moffitt committed
17

Michael Smith's avatar
Michael Smith committed
18
#include "stats.h"
Jack Moffitt's avatar
Jack Moffitt committed
19 20
#include "format.h"

21 22 23
#define CATMODULE "format-vorbis"
#include "logging.h"

Michael Smith's avatar
Michael Smith committed
24 25
#define MAX_HEADER_PAGES 10

Jack Moffitt's avatar
Jack Moffitt committed
26 27
typedef struct _vstate_tag
{
28 29 30 31 32 33 34 35 36 37
    ogg_sync_state oy;
    ogg_stream_state os;
    vorbis_info vi;
    vorbis_comment vc;

    ogg_page og;
    unsigned long serialno;
    int header;
    refbuf_t *headbuf[MAX_HEADER_PAGES];
    int packets;
Jack Moffitt's avatar
Jack Moffitt committed
38 39
} vstate_t;

40 41 42 43
static void format_vorbis_free_plugin(format_plugin_t *self);
static int format_vorbis_get_buffer(format_plugin_t *self, char *data, 
        unsigned long len, refbuf_t **buffer);
static refbuf_queue_t *format_vorbis_get_predata(format_plugin_t *self);
Michael Smith's avatar
Michael Smith committed
44 45 46 47
static void *format_vorbis_create_client_data(format_plugin_t *self,
        source_t *source, client_t *client);
static void format_vorbis_send_headers(format_plugin_t *self,
        source_t *source, client_t *client);
Jack Moffitt's avatar
Jack Moffitt committed
48 49 50

format_plugin_t *format_vorbis_get_plugin(void)
{
51 52
    format_plugin_t *plugin;
    vstate_t *state;
Jack Moffitt's avatar
Jack Moffitt committed
53

54
    plugin = (format_plugin_t *)malloc(sizeof(format_plugin_t));
55

56 57 58 59
    plugin->type = FORMAT_TYPE_VORBIS;
    plugin->has_predata = 1;
    plugin->get_buffer = format_vorbis_get_buffer;
    plugin->get_predata = format_vorbis_get_predata;
60 61
    plugin->write_buf_to_client = format_generic_write_buf_to_client;
    plugin->create_client_data = format_vorbis_create_client_data;
Michael Smith's avatar
Michael Smith committed
62
    plugin->client_send_headers = format_vorbis_send_headers;
63
    plugin->free_plugin = format_vorbis_free_plugin;
64
    plugin->format_description = "Ogg Vorbis";
Jack Moffitt's avatar
Jack Moffitt committed
65

66 67
    state = (vstate_t *)calloc(1, sizeof(vstate_t));
    ogg_sync_init(&state->oy);
Jack Moffitt's avatar
Jack Moffitt committed
68

69
    plugin->_state = (void *)state;
Jack Moffitt's avatar
Jack Moffitt committed
70

71
    return plugin;
Jack Moffitt's avatar
Jack Moffitt committed
72 73
}

74 75
void format_vorbis_free_plugin(format_plugin_t *self)
{
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97
    int i;
    vstate_t *state = (vstate_t *)self->_state;

    /* free memory associated with this plugin instance */

    /* free state memory */
    ogg_sync_clear(&state->oy);
    ogg_stream_clear(&state->os);
    vorbis_comment_clear(&state->vc);
    vorbis_info_clear(&state->vi);
    
    for (i = 0; i < MAX_HEADER_PAGES; i++) {
        if (state->headbuf[i]) {
            refbuf_release(state->headbuf[i]);
            state->headbuf[i] = NULL;
        }
    }

    free(state);

    /* free the plugin instance */
    free(self);
98 99
}

Michael Smith's avatar
Michael Smith committed
100
int format_vorbis_get_buffer(format_plugin_t *self, char *data, unsigned long len, refbuf_t **buffer)
Jack Moffitt's avatar
Jack Moffitt committed
101
{
102 103 104 105
    char *buf;
    int i, result;
    ogg_packet op;
    char *tag;
Michael Smith's avatar
Michael Smith committed
106
    refbuf_t *refbuf;
107
    vstate_t *state = (vstate_t *)self->_state;
108 109 110 111
#ifdef USE_YP
    source_t *source;
    time_t current_time;
#endif
Jack Moffitt's avatar
Jack Moffitt committed
112

113 114 115
    if (data) {
        /* write the data to the buffer */
        buf = ogg_sync_buffer(&state->oy, len);
Michael Smith's avatar
Michael Smith committed
116
        memcpy(buf, data, len);
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
        ogg_sync_wrote(&state->oy, len);
    }

    refbuf = NULL;
    if (ogg_sync_pageout(&state->oy, &state->og) == 1) {
        refbuf = refbuf_new(state->og.header_len + state->og.body_len);
        memcpy(refbuf->data, state->og.header, state->og.header_len);
        memcpy(&refbuf->data[state->og.header_len], state->og.body, state->og.body_len);

        if (state->serialno != ogg_page_serialno(&state->og)) {
            /* this is a new logical bitstream */
            state->header = 0;
            state->packets = 0;

            /* release old headers, stream state, vorbis data */
            for (i = 0; i < MAX_HEADER_PAGES; i++) {
                if (state->headbuf[i]) {
                    refbuf_release(state->headbuf[i]);
                    state->headbuf[i] = NULL;
                }
            }
138
            /* Clear old stuff. Rarely but occasionally needed. */
139 140 141
            ogg_stream_clear(&state->os);
            vorbis_comment_clear(&state->vc);
            vorbis_info_clear(&state->vi);
Jack Moffitt's avatar
Jack Moffitt committed
142

143 144 145 146 147
            state->serialno = ogg_page_serialno(&state->og);
            ogg_stream_init(&state->os, state->serialno);
            vorbis_info_init(&state->vi);
            vorbis_comment_init(&state->vc);
        }
Jack Moffitt's avatar
Jack Moffitt committed
148

149
        if (state->header >= 0) {
Michael Smith's avatar
Michael Smith committed
150 151 152 153
            /* FIXME: In some streams (non-vorbis ogg streams), this could get
             * extras pages beyond the header. We need to collect the pages
             * here anyway, but they may have to be discarded later.
             */
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
            if (ogg_page_granulepos(&state->og) <= 0) {
                state->header++;
            } else {
                /* we're done caching headers */
                state->header = -1;

                /* put known comments in the stats */
                tag = vorbis_comment_query(&state->vc, "TITLE", 0);
                if (tag) stats_event(self->mount, "title", tag);
                else stats_event(self->mount, "title", "unknown");
                tag = vorbis_comment_query(&state->vc, "ARTIST", 0);
                if (tag) stats_event(self->mount, "artist", tag);
                else stats_event(self->mount, "artist", "unknown");

                /* don't need these now */
                ogg_stream_clear(&state->os);
                vorbis_comment_clear(&state->vc);
                vorbis_info_clear(&state->vi);
172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189
#ifdef USE_YP
                /* If we get an update on the mountpoint, force a
                   yp touch */
                avl_tree_rlock(global.source_tree);
                source = source_find_mount(self->mount);
                avl_tree_unlock(global.source_tree);

                if (source) {
                    /* If we get an update on the mountpoint, force a
                       yp touch */
                    current_time = time(NULL);
                    for (i=0; i<source->num_yp_directories; i++) {
                        source->ypdata[i]->yp_last_touch = current_time -
                            source->ypdata[i]->yp_touch_interval + 2;
                    }
                }
#endif

190 191 192 193 194
            }
        }

        /* cache header pages */
        if (state->header > 0 && state->packets < 3) {
Michael Smith's avatar
Michael Smith committed
195 196
            if(state->header > MAX_HEADER_PAGES) {
                refbuf_release(refbuf);
197 198
                ERROR1("Bad vorbis input: header is more than %d pages long", MAX_HEADER_PAGES);

Michael Smith's avatar
Michael Smith committed
199 200
                return -1;
            }
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
            refbuf_addref(refbuf);
            state->headbuf[state->header - 1] = refbuf;

            if (state->packets >= 0 && state->packets < 3) {
                ogg_stream_pagein(&state->os, &state->og);
                while (state->packets < 3) {
                    result = ogg_stream_packetout(&state->os, &op);
                    if (result == 0) break; /* need more data */
                    if (result < 0) {
                        state->packets = -1;
                        break;
                    }

                    state->packets++;

                    if (vorbis_synthesis_headerin(&state->vi, &state->vc, &op) < 0) {
                        state->packets = -1;
                        break;
                    }
                }
            }
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
224

Michael Smith's avatar
Michael Smith committed
225
    *buffer = refbuf;
226
    return 0;
Jack Moffitt's avatar
Jack Moffitt committed
227 228 229 230
}

refbuf_queue_t *format_vorbis_get_predata(format_plugin_t *self)
{
231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
    refbuf_queue_t *queue;
    int i;
    vstate_t *state = (vstate_t *)self->_state;

    queue = NULL;
    for (i = 0; i < MAX_HEADER_PAGES; i++) {
        if (state->headbuf[i]) {
            refbuf_addref(state->headbuf[i]);
            refbuf_queue_add(&queue, state->headbuf[i]);
        } else {
            break;
        }
    }

    return queue;
Jack Moffitt's avatar
Jack Moffitt committed
246 247
}

Michael Smith's avatar
Michael Smith committed
248 249 250
static void *format_vorbis_create_client_data(format_plugin_t *self,
        source_t *source, client_t *client) 
{
251 252
    return NULL;
}
Jack Moffitt's avatar
Jack Moffitt committed
253

Michael Smith's avatar
Michael Smith committed
254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269
static void format_vorbis_send_headers(format_plugin_t *self,
        source_t *source, client_t *client)
{
    int bytes;
    
    client->respcode = 200;
    bytes = sock_write(client->con->sock, 
            "HTTP/1.0 200 OK\r\n" 
            "Content-Type: %s\r\n", 
            format_get_mimetype(source->format->type));

    if(bytes > 0) client->con->sent_bytes += bytes;

    format_send_general_headers(self, source, client);
}

Jack Moffitt's avatar
Jack Moffitt committed
270