#include "error.h"
#include "string.h"
#include "ogg_afh_common.h"
-
+#include "fd.h"
/* Taken from decoder_example.c of libvorbis-1.2.3. */
static int process_packets_2_and_3(ogg_sync_state *oss,
ogg_sync_clear(&oss);
return ret;
}
+
+static int write_ogg_page(int fd, const ogg_page *op)
+{
+ int ret;
+
+ PARA_DEBUG_LOG("header/body: %lu/%lu\n", op->header_len, op->body_len);
+ ret = xwrite(fd, (const char *)op->header, op->header_len);
+ if (ret < 0)
+ return ret;
+ return xwrite(fd, (const char *)op->body, op->body_len);
+}
+
+/**
+ * Change meta tags of ogg files.
+ *
+ * \param map The (read-only) memory map of the input file.
+ * \param map_sz The size of the input file in bytes.
+ * \param fd The output file descriptor.
+ * \param meta_packet Codec-specific packet containing modified tags.
+ * \param meta_sz Size of the metadata packet.
+ *
+ * This function writes a new ogg file content using file descriptor \a fd,
+ * which must correspond to a file which has been opened for writing. The
+ * second packet is supposed to contain the metadata, and is replaced by \a
+ * meta_packet. This output file has to be closed by the caller.
+ *
+ * \return Standard.
+ */
+int ogg_rewrite_tags(const char *map, size_t map_sz, int fd,
+ char *meta_packet, size_t meta_sz)
+{
+ ogg_sync_state oss_in, oss_out;
+ ogg_stream_state stream_in, stream_out, *si = NULL, *so = NULL;
+ ogg_packet packet;
+ ogg_page op;
+ char *buf;
+ int serial, ret;
+ long len = map_sz;
+
+ ogg_sync_init(&oss_in);
+ ogg_sync_init(&oss_out);
+
+ ret = -E_OGG_SYNC;
+ buf = ogg_sync_buffer(&oss_in, len);
+ if (!buf)
+ goto out;
+ memcpy(buf, map, len);
+ ret = -E_OGG_SYNC;
+ if (ogg_sync_wrote(&oss_in, len) < 0)
+ goto out;
+ if (ogg_sync_pageout(&oss_in, &op) != 1)
+ goto out;
+ ret = ogg_page_serialno(&op);
+ serial = ret;
+
+ si = &stream_in;
+ ogg_stream_init(si, serial);
+ /* Packet #0 goes to an own page */
+ ret = -E_STREAM_PAGEIN;
+ if (ogg_stream_pagein(si, &op) < 0)
+ goto out;
+ ret = -E_STREAM_PACKETOUT;
+ if (ogg_stream_packetout(si, &packet) != 1)
+ goto out;
+ ret = -E_STREAM_PACKETIN;
+ so = &stream_out;
+ ogg_stream_init(so, serial);
+ if (ogg_stream_packetin(so, &packet) != 0)
+ goto out;
+ ret = ogg_stream_flush(so, &op);
+ assert(ret != 0);
+ /* packets have been flushed into the page. */
+ ret = write_ogg_page(fd, &op);
+ if (ret < 0)
+ goto out;
+ /*
+ * For all supported ogg/xxx audio formats the meta data packet is
+ * packet #1. Write out our modified version of this packet.
+ */
+ packet.packetno = 1;
+ packet.b_o_s = packet.e_o_s = 0;
+ packet.packet = (typeof(packet.packet))meta_packet;
+ packet.bytes = meta_sz;
+ ret = -E_STREAM_PACKETIN;
+ if (ogg_stream_packetin(so, &packet) != 0)
+ goto out;
+ /* Copy ogg packets, ignoring the meta data packet. */
+ for (;;) {
+ ret = ogg_stream_packetout(si, &packet);
+ if (ret == -1)
+ break;
+ if (ret != 1) {
+ ret = -E_STREAM_PAGEOUT;
+ if (ogg_sync_pageout(&oss_in, &op) < 0)
+ goto out;
+ ret = -E_STREAM_PAGEIN;
+ if (ogg_stream_pagein(si, &op))
+ goto out;
+ continue;
+ }
+ PARA_DEBUG_LOG("packet: bytes: %d, granule: %d, packetno: %u\n",
+ (int)packet.bytes, (int)packet.granulepos,
+ (int)packet.packetno);
+ /* ignore meta data packet which we replaced */
+ if (packet.packetno == 1)
+ continue;
+ ret = -E_STREAM_PACKETIN;
+ if (ogg_stream_packetin(so, &packet) != 0)
+ goto out;
+ /* only create a new ogg page if granulepos is valid */
+ if (packet.granulepos == -1)
+ continue;
+ /* force remaining packets into a page */
+ for (;;) {
+#ifdef HAVE_OGG_STREAM_FLUSH_FILL
+ ret = ogg_stream_flush_fill(so, &op, INT_MAX);
+#else
+ ret = ogg_stream_flush(so, &op);
+#endif
+ if (ret <= 0)
+ break;
+ PARA_DEBUG_LOG("writing page (%lu bytes)\n",
+ op.header_len + op.body_len);
+ ret = write_ogg_page(fd, &op);
+ if (ret < 0)
+ goto out;
+ }
+ }
+ if (ogg_stream_flush(so, &op)) {
+ /* write remaining data */
+ ret = write_ogg_page(fd, &op);
+ if (ret < 0)
+ goto out;
+ }
+ ret = 1;
+out:
+ ogg_sync_clear(&oss_in);
+ ogg_sync_clear(&oss_out);
+ if (si)
+ ogg_stream_clear(si);
+ if (so)
+ ogg_stream_clear(so);
+ return ret;
+}