/*
- * Copyright (C) 2004-2011 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2004 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
vorbis_comment vc;
};
+/*
+ * Vorbis uses three header packets, all of which are required: the
+ * identification header, the comments header, and the setup header.
+ *
+ * The identification header identifies the bitstream as Vorbis. It contains
+ * the Vorbis version and simple audio characteristics of the stream such as
+ * sample rate and number of channels.
+ *
+ * The comment header includes user text comments (tags) and a vendor string
+ * for the application/library that produced the bitstream.
+ *
+ * The setup header includes extensive CODEC setup information as well as the
+ * complete VQ and Huffman codebooks needed for decoding.
+ */
static int vorbis_packet_callback(ogg_packet *packet, int packet_num,
- struct afh_info *afhi, void *private_data)
+ __a_unused int serial, struct afh_info *afhi, void *private_data)
{
struct private_vorbis_data *pvd = private_data;
return ret;
}
-static const char* ogg_suffixes[] = {"ogg", NULL};
+struct vorbis_get_header_data {
+ ogg_stream_state os;
+ char *buf;
+ size_t len;
+};
+
+static void add_ogg_page(ogg_page *og, struct vorbis_get_header_data *vghd)
+{
+ size_t old_len = vghd->len;
+ size_t new_len = vghd->len + og->header_len + og->body_len;
+ char *buf = para_realloc(vghd->buf, new_len), *p = buf + old_len;
+
+ memcpy(p, og->header, og->header_len);
+ memcpy(p + og->header_len, og->body, og->body_len);
+ vghd->buf = buf;
+ vghd->len = new_len;
+ PARA_DEBUG_LOG("header/body/old/new: %li/%li/%zu/%zu\n",
+ og->header_len, og->body_len, old_len, new_len);
+}
+
+static int vorbis_get_header_callback(ogg_packet *packet, int packet_num,
+ int serial, __a_unused struct afh_info *afhi, void *private_data)
+{
+ int ret;
+ struct vorbis_get_header_data *vghd = private_data;
+ ogg_page og;
+ static unsigned char dummy_packet[] = {
+ 0x03,
+ 'v', 'o', 'r', 'b', 'i', 's',
+ 0x06, 0x00, 0x00, 0x00,
+ 'd', 'u', 'm', 'm', 'y', '\0',
+ 0x00, 0x00, 0x00, 0x00, /* no comment :) */
+ 0xff /* framing bit */
+ };
+
+ PARA_DEBUG_LOG("processing ogg packet #%d\n", packet_num);
+ if (packet_num > 2)
+ return 0;
+ if (packet_num == 0) {
+ ogg_stream_init(&vghd->os, serial);
+ ret = ogg_stream_packetin(&vghd->os, packet);
+ if (ret < 0)
+ goto out;
+ ret = -E_OGG_STREAM_FLUSH;
+ if (ogg_stream_flush(&vghd->os, &og) == 0)
+ goto out;
+ add_ogg_page(&og, vghd);
+ return 1;
+ }
+ if (packet_num == 1) {
+ ogg_packet replacement = *packet;
+ PARA_INFO_LOG("replacing metadata packet\n");
+ replacement.packet = dummy_packet;
+ replacement.bytes = sizeof(dummy_packet);
+ ret = ogg_stream_packetin(&vghd->os, &replacement);
+ if (ret >= 0)
+ return 1;
+ ret = -E_OGG_PACKET_IN;
+ goto out;
+ }
+ ret = -E_OGG_PACKET_IN;
+ if (ogg_stream_packetin(&vghd->os, packet) < 0)
+ goto out;
+ while (ogg_stream_flush(&vghd->os, &og))
+ add_ogg_page(&og, vghd);
+ ret = 0;
+out:
+ ogg_stream_clear(&vghd->os);
+ return ret;
+}
+
+static void vorbis_get_header(void *map, size_t mapsize, char **buf,
+ size_t *len)
+{
+ int ret;
+ struct vorbis_get_header_data vghd = {.len = 0};
+ struct ogg_afh_callback_info cb = {
+ .packet_callback = vorbis_get_header_callback,
+ .private_data = &vghd,
+ };
+
+ ret = ogg_get_file_info(map, mapsize, NULL, &cb);
+ if (ret < 0)
+ goto fail;
+ *buf = vghd.buf;
+ *len = vghd.len;
+ PARA_INFO_LOG("created %zu byte ogg vorbis header\n", *len);
+ return;
+fail:
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+}
+
+static int vorbis_make_meta_packet(struct taginfo *tags, ogg_packet *result)
+{
+ vorbis_comment vc;
+ int ret;
+
+ vorbis_comment_init(&vc);
+ vorbis_comment_add_tag(&vc, "artist", tags->artist);
+ vorbis_comment_add_tag(&vc, "title", tags->title);
+ vorbis_comment_add_tag(&vc, "album", tags->album);
+ vorbis_comment_add_tag(&vc, "year", tags->year);
+ vorbis_comment_add_tag(&vc, "comment", tags->comment);
+ ret = vorbis_commentheader_out(&vc, result);
+ vorbis_comment_clear(&vc);
+ if (ret != 0)
+ return -E_VORBIS_COMMENTHEADER;
+ return 1;
+}
+
+static int vorbis_rewrite_tags(const char *map, size_t mapsize,
+ struct taginfo *tags, int output_fd,
+ __a_unused const char *filename)
+{
+ int ret;
+ ogg_packet packet;
+
+ ret = vorbis_make_meta_packet(tags, &packet);
+ if (ret < 0)
+ return ret;
+ ret = ogg_rewrite_tags(map, mapsize, output_fd, (char *)packet.packet,
+ packet.bytes);
+ free(packet.packet);
+ return ret;
+}
+
+static const char * const ogg_suffixes[] = {"ogg", NULL};
/**
* The init function of the ogg vorbis audio format handler.
*/
void ogg_init(struct audio_format_handler *afh)
{
- afh->get_file_info = ogg_vorbis_get_file_info,
+ afh->get_file_info = ogg_vorbis_get_file_info;
+ afh->get_header = vorbis_get_header;
afh->suffixes = ogg_suffixes;
+ afh->rewrite_tags = vorbis_rewrite_tags;
}
projects / paraslash.git / blobdiff