RC4: Allocate 8 extra bytes for send buffer.
[paraslash.git] / ogg_afh.c
index ba0b64b..4b44ea1 100644 (file)
--- a/ogg_afh.c
+++ b/ogg_afh.c
 /*
- * Copyright (C) 2004-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2004-2010 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
-/** \file ogg_afh.c para_server's ogg vorbis audio format handler */
+
+/** \file ogg_afh.c Audio format handler for ogg vorbis files. */
 
 #include <inttypes.h>
 #include <ogg/ogg.h>
 #include <vorbis/codec.h>
-#include <vorbis/vorbisfile.h>
+#include <regex.h>
 
 #include "para.h"
 #include "afh.h"
 #include "error.h"
 #include "string.h"
-#include "afs.h"
-#include "server.h"
-
-/** must be big enough to hold header */
-#define CHUNK_SIZE 32768
-static double chunk_time = 0.25;
-
-/** describes a memory-mapped ogg vorbis file */
-struct ogg_datasource {
-       /** the memory mapping */
-       char *map;
-       /** this size of the mapping */
-       off_t numbytes;
-       /** the current position in the mapping */
-       off_t fpos;
-};
-
-static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
-{
-       struct ogg_datasource *ods = datasource;
-       size_t copy = PARA_MIN(ods->numbytes - ods->fpos, size * nmemb),
-               ret = copy / size;
-       if (!ret)
-               return 0;
-       memcpy(buf, ods->map + ods->fpos, copy);
-//     PARA_INFO_LOG("size: %zd, nmemb: %zd, ret: %zd\n", size, nmemb, ret);
-       ods->fpos += ret * size;
-       return ret;
-}
 
-static int cb_seek(void *datasource, ogg_int64_t offset,
-               int whence)
+/* Taken from decoder_example.c of libvorbis-1.2.3. */
+static int read_vorbis_comment(ogg_sync_state *oss, ogg_stream_state *stream,
+               vorbis_info *vi, vorbis_comment *vc)
 {
-       struct ogg_datasource *ods = datasource;
-       switch (whence) {
-       case SEEK_SET:
-               if (offset >= 0 && offset <= ods->numbytes) {
-                       ods->fpos = offset;
-                       return 0;
-               }
-               errno = EINVAL;
-               return -1;
-               break;
-       case SEEK_END:
-               if (offset <= 0 && -offset <= ods->numbytes) {
-                       ods->fpos = ods->numbytes + offset;
-                       return 0;
-               }
-               errno = EINVAL;
-               return -1;
-               break;
-       case SEEK_CUR:
-               if ((offset >= 0 && offset + ods->fpos > ods->numbytes) ||
-                               (offset < 0 && offset + ods->fpos < 0)) {
-                       errno = EINVAL;
-                       return -1;
+       ogg_page page;
+       ogg_packet packet;
+       int i = 0;
+
+       while (i < 2) {
+               while (i < 2) {
+                       int ret = ogg_sync_pageout(oss, &page);
+                       if (ret == 0)
+                               break; /* Need more data */
+                       if (ret != 1)
+                               continue;
+                       /*
+                        * We can ignore any errors here as they'll also become
+                        * apparent at packetout.
+                        */
+                       ogg_stream_pagein(stream, &page);
+                       while (i < 2) {
+                               ret = ogg_stream_packetout(stream, &packet);
+                               if (ret == 0)
+                                       break;
+                               if (ret < 0)
+                                       return -E_STREAM_PACKETOUT;
+                               ret = vorbis_synthesis_headerin(vi, vc,
+                                       &packet);
+                               if (ret < 0)
+                                       return -E_VORBIS;
+                               i++;
+                       }
                }
-               ods->fpos += offset;
-               return 0;
        }
-       errno = EINVAL;
-       return -1;
-}
-
-/* don't do anything as vss still needs the open filehandle */
-static int cb_close(__a_unused void *datasource)
-{
-       return 0;
-}
-
-static long cb_tell(void *datasource)
-{
-       struct ogg_datasource *ods = datasource;
-       return (unsigned long)ods->fpos;
-}
-
-static int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
-{
-       int ret = ov_open_callbacks(datasource, vf,
-               NULL, /* no initial buffer */
-               0, /* no initial bytes */
-               c); /* the ov_open_callbacks */
-
-       if (ret == OV_EREAD)
-               return -E_OGG_READ;
-       if (ret == OV_ENOTVORBIS)
-               return -E_VORBIS;
-       if (ret == OV_EVERSION)
-               return -E_OGG_VERSION;
-       if (ret == OV_EBADHEADER)
-               return -E_OGG_BAD_HEADER;
-       if (ret < 0)
-               return -E_OGG_UNKNOWN_ERROR;
        return 1;
-
 }
 
-static int ogg_compute_header_len(char *map, size_t numbytes,
-               struct afh_info *afhi)
+static int read_vorbis_info(ogg_sync_state *oss, struct afh_info *afhi)
 {
-       int ret;
-       size_t len = PARA_MIN(numbytes, CHUNK_SIZE);
-       int serial;
-       char *buf;
-
-       ogg_page page;
-       ogg_packet packet;
        vorbis_comment vc;
        vorbis_info vi;
-       ogg_stream_state *stream_in = para_malloc(sizeof(ogg_stream_state));
-       ogg_stream_state *stream_out = para_malloc(sizeof(ogg_stream_state));
-       ogg_sync_state *sync_in = para_malloc(sizeof(ogg_sync_state));
+       ogg_packet packet;
+       ogg_stream_state stream;
+       ogg_page page;
+       int ret;
 
-       ogg_sync_init(sync_in);
        vorbis_info_init(&vi);
        vorbis_comment_init(&vc);
-       buf = ogg_sync_buffer(sync_in, (long)len);
-       memcpy(buf, map, len);
-       ogg_sync_wrote(sync_in, (long)len);
+
        ret = -E_SYNC_PAGEOUT;
-       if (ogg_sync_pageout(sync_in, &page) <= 0) {
-               free(stream_in);
-               free(stream_out);
-               goto err1;
-       }
-       serial = ogg_page_serialno(&page);
-       ogg_stream_init(stream_in, serial);
-       ogg_stream_init(stream_out, serial);
-       ret = ogg_stream_pagein(stream_in, &page);
-       if (ret < 0) {
-               ret = -E_STREAM_PAGEIN;
-               goto err2;
-       }
-       ret = ogg_stream_packetout(stream_in, &packet);
-       if (ret != 1) {
-               ret = -E_STREAM_PACKETOUT;
-               goto err2;
-       }
-       ret = -E_VORBIS;
-       if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
-               goto err2;
-       PARA_DEBUG_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
-       ogg_stream_packetin(stream_out, &packet);
+       if (ogg_sync_pageout(oss, &page) != 1)
+               goto out;
 
-       ret = ogg_sync_pageout(sync_in, &page);
-       if (ret <= 0) {
-               ret = -E_SYNC_PAGEOUT;
-               goto err2;
-       }
-       ogg_stream_pagein(stream_in, &page);
-       ogg_stream_packetout(stream_in, &packet);
-       ogg_stream_packetin(stream_out, &packet);
+       ret = ogg_page_serialno(&page);
+       ogg_stream_init(&stream, ret);
 
-       ret = ogg_sync_pageout(sync_in, &page);
-       if (ret <= 0) {
-               ret = -E_SYNC_PAGEOUT;
-               goto err2;
-       }
-       ogg_stream_pagein(stream_in, &page);
-       ogg_stream_packetout(stream_in, &packet);
-       ogg_stream_packetin(stream_out, &packet);
+       ret = -E_STREAM_PAGEIN;
+       if (ogg_stream_pagein(&stream, &page) < 0)
+               goto out;
+
+       ret = -E_STREAM_PACKETOUT;
+       if (ogg_stream_packetout(&stream, &packet) != 1)
+               goto out;
+
+       ret = -E_VORBIS;
+       if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
+               goto out;
+       if (vi.rate == 0)
+               goto out;
+       afhi->channels = vi.channels;
+       afhi->frequency = vi.rate;
+       afhi->bitrate = vi.bitrate_nominal / 1000;
+       PARA_DEBUG_LOG("channels: %i, sampling rate: %i, bitrate: %i\n",
+               afhi->channels, afhi->frequency, afhi->bitrate);
+       ret = read_vorbis_comment(oss, &stream, &vi, &vc);
+       if (ret < 0)
+               goto out;
+       afhi->tags.artist = para_strdup(vorbis_comment_query(&vc, "artist", 0));
+       afhi->tags.title = para_strdup(vorbis_comment_query(&vc, "title", 0));
+       afhi->tags.album = para_strdup(vorbis_comment_query(&vc, "album", 0));
+       afhi->tags.year = para_strdup(vorbis_comment_query(&vc, "year", 0));
+       afhi->tags.comment = para_strdup(vorbis_comment_query(&vc, "comment", 0));
 
-       afhi->header_len = 0;
-       while (ogg_stream_flush(stream_out, &page))
-               afhi->header_len += page.body_len + page.header_len;
-       PARA_DEBUG_LOG("header_len = %d\n", afhi->header_len);
        afhi->header_offset = 0;
+       afhi->header_len = oss->returned;
        ret = 1;
-err2:
-       ogg_stream_destroy(stream_in);
-       ogg_stream_destroy(stream_out);
-err1:
-       ogg_sync_destroy(sync_in);
+out:
        vorbis_info_clear(&vi);
        vorbis_comment_clear(&vc);
+       //ogg_stream_clear(&stream);
        return ret;
 }
 
-/*
- * Alloc and fill array table of byte offsets. chunk_table[i] is the
- * offset in the current input file at which the sample containing time i *
- * CHUNK_TIME begins. Always successful.
- */
-static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
-       struct afh_info *afhi, long unsigned time_total)
+static void set_chunk_tv(int num_frames, int num_chunks, int frequency,
+               struct timeval *result)
 {
-       int i, ret, num;
-       ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
-       long unsigned num_chunks;
+       uint64_t x = (uint64_t)num_frames * 1000 * 1000
+               / frequency / num_chunks;
 
-       old_pos = 0;
-       ret = 0;
-       num = time_total / chunk_time + 3;
-       PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
-               chunk_time, num);
-       afhi->chunk_table = para_malloc((num + 1) * sizeof(size_t));
-       afhi->chunk_table[0] = 0;
-       max_chunk_len = 0;
-       for (i = 1; ret <= num; i++) {
-               ogg_int64_t diff;
-               ret = ov_time_seek(of, i * chunk_time);
-               if (ret)
-                       break;
-               pos = ov_raw_tell(of);
-               diff = pos - old_pos;
-               max_chunk_len = PARA_MAX(max_chunk_len, diff);
-               min = (i == 1)? diff : PARA_MIN(min, diff);
-               afhi->chunk_table[i] = pos;
-//             if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
-//                     PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
-//                             "size: %zd\n", i - 1,
-//                             i * chunk_time, pos, pos - old_pos);
-               old_pos = pos;
-       }
-       num_chunks = i - 1;
-//fi->chunk_table[i] = pos;
-       PARA_DEBUG_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
-               num_chunks, chunk_time, max_chunk_len, min);
-       return num_chunks;
+       result->tv_sec = x / 1000 / 1000;
+       result->tv_usec = x % (1000 * 1000);
+       PARA_INFO_LOG("%d chunks, chunk time: %lums\n", num_chunks,
+               tv2ms(result));
 }
 
-/*
- * Init oggvorbis file and write some tech data to given pointers.
- */
-static int ogg_get_file_info(char *map, size_t numbytes,
+/* Write tech data to given audio format handler struct. */
+static int ogg_get_file_info(char *map, size_t numbytes, __a_unused int fd,
                struct afh_info *afhi)
 {
-       int ret;
-       vorbis_info *vi;
-       OggVorbis_File of;
-       const ov_callbacks ovc = {
-               .read_func = cb_read,
-               .seek_func = cb_seek,
-               .close_func = cb_close,
-               .tell_func = cb_tell
-       };
-       struct ogg_datasource ods = {.map = map, .numbytes = numbytes, .fpos = 0};
-
-       ret = ogg_compute_header_len(map, numbytes, afhi);
-       if (ret < 0)
-               return ret;
-       ret = ogg_open_callbacks(&ods, &of, ovc);
+       ogg_sync_state oss;
+       ogg_page op;
+       long len = numbytes;
+       char *buf;
+       int ret, i, j, frames_per_chunk, ct_size;
+       long long unsigned num_frames = 0;
+
+       ogg_sync_init(&oss);
+       ret = -E_OGG_SYNC;
+       buf = ogg_sync_buffer(&oss, len);
+       if (!buf)
+               goto out;
+       memcpy(buf, map, len);
+       ret = -E_OGG_SYNC;
+       if (ogg_sync_wrote(&oss, len) < 0)
+               goto out;
+       ret = read_vorbis_info(&oss, afhi);
        if (ret < 0)
-               goto err;
-       ret = -E_OGG_INFO;
-       vi = ov_info(&of, 0);
-       if (!vi)
-               goto err;
-       afhi->seconds_total = ov_time_total(&of, -1);
-       afhi->frequency = vi->rate;
-       afhi->bitrate = ov_bitrate(&of, 0) / 1000;
-       afhi->channels = vi->channels;
-       afhi->chunks_total = ogg_compute_chunk_table(&of, afhi, afhi->seconds_total);
-       afhi->info_string[0] = '\0';
-       sprintf(afhi->info_string, "%s:\n%s:\n%s:\n",
-               status_item_list[SI_AUDIO_FILE_INFO],
-               status_item_list[SI_TAGINFO1],
-               status_item_list[SI_TAGINFO2]
-       );
-       afhi->chunk_tv.tv_sec = 0;
-       afhi->chunk_tv.tv_usec = 250 * 1000;
-       tv_scale(10 / afhi->channels, &afhi->chunk_tv, &afhi->eof_tv);
-       ret = 1;
-err:
-       ov_clear(&of); /* keeps the file open */
+               goto out;
+       oss.returned = 0;
+       oss.fill = numbytes;
+       /* count ogg packages and get duration of the file */
+       for (i = 0; ogg_sync_pageseek(&oss, &op) > 0; i++)
+               num_frames = ogg_page_granulepos(&op);
+       PARA_INFO_LOG("%d pages, %llu frames\n", i, num_frames);
+       ret = -E_OGG_EMPTY;
+       if (i == 0)
+               goto out;
+       afhi->seconds_total = num_frames / afhi->frequency;
+       /* use roughly one page per chunk */
+       frames_per_chunk = num_frames / i;
+       PARA_INFO_LOG("%lu seconds, %d frames/chunk\n",
+               afhi->seconds_total, frames_per_chunk);
+       ct_size = 250;
+       afhi->chunk_table = para_malloc(ct_size * sizeof(uint32_t));
+       afhi->chunk_table[0] = 0;
+       afhi->chunk_table[1] = afhi->header_len;
+       oss.returned = afhi->header_len;
+       oss.fill = numbytes;
+       for (i = 0, j = 1; ogg_sync_pageseek(&oss, &op) > 0; i++) {
+               int granule = ogg_page_granulepos(&op);
+
+               while (granule > j * frames_per_chunk) {
+                       j++;
+                       if (j >= ct_size) {
+                               ct_size *= 2;
+                               afhi->chunk_table = para_realloc(
+                                       afhi->chunk_table,
+                                       ct_size * sizeof(uint32_t));
+                       }
+                       afhi->chunk_table[j] = oss.returned;
+               }
+       }
+       afhi->chunks_total = j;
+       set_chunk_tv(num_frames, j, afhi->frequency, &afhi->chunk_tv);
+       ret = 0;
+out:
+       ogg_sync_clear(&oss);
        return ret;
 }
 
 static const char* ogg_suffixes[] = {"ogg", NULL};
 
 /**
- * the init function of the ogg vorbis audio format handler
+ * The init function of the ogg vorbis audio format handler.
  *
- * \param afh pointer to the struct to initialize
+ * \param afh Pointer to the struct to initialize.
  */
 void ogg_init(struct audio_format_handler *afh)
 {