-/*
- * Copyright (C) 2004-2014 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2004 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file ogg_afh_common.c Functions common to all ogg/ codecs. */
#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_stream_state *stream, struct afh_info *afhi,
- struct ogg_afh_callback_info *ci)
+ struct oac_callback_info *ci)
{
ogg_page page;
ogg_packet packet;
}
static int process_ogg_packets(ogg_sync_state *oss, struct afh_info *afhi,
- struct ogg_afh_callback_info *ci)
+ struct oac_callback_info *ci)
{
ogg_packet packet;
ogg_stream_state stream;
*
* \return Standard.
*/
-int ogg_get_file_info(char *map, size_t numbytes, struct afh_info *afhi,
- struct ogg_afh_callback_info *ci)
+int oac_get_file_info(char *map, size_t numbytes, struct afh_info *afhi,
+ struct oac_callback_info *ci)
{
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);
+ buf = ogg_sync_buffer(&oss, numbytes);
if (!buf)
goto out;
- memcpy(buf, map, len);
+ memcpy(buf, map, numbytes);
ret = -E_OGG_SYNC;
- if (ogg_sync_wrote(&oss, len) < 0)
+ if (ogg_sync_wrote(&oss, numbytes) < 0)
goto out;
ret = process_ogg_packets(&oss, afhi, ci);
if (ret < 0)
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",
+ PARA_INFO_LOG("%" PRIu32 " 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->chunks_total = j;
+ set_max_chunk_size(afhi);
set_chunk_tv(frames_per_chunk, afhi->frequency, &afhi->chunk_tv);
ret = 0;
out:
ogg_sync_clear(&oss);
return ret;
}
+
+static int write_ogg_page(int fd, const ogg_page *op)
+{
+ int ret;
+
+ PARA_DEBUG_LOG("header/body: %li/%li\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 oac_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: %d\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 (%li 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;
+}
+
+/* Structure for providing custom headers for streaming. */
+struct oac_custom_header {
+ char *buf;
+ size_t len;
+ ogg_stream_state oss;
+};
+
+/**
+ * Allocate and return a custom header structure.
+ *
+ * For some audio codecs which employ the ogg container format, the server side
+ * wants to replace the meta tags at the beginning of the file because they are
+ * not needed for streaming and can be arbitrary large. The structure returned
+ * by this function is typically used as the ->private field of struct \ref
+ * oac_callback_info for \ref oac_get_file_info(). This allows the audio format
+ * handler to set up a custom header which is identical to the original header,
+ * but with the meta data part replaced by fixed length dummy contents.
+ *
+ * \return The returned memory must be initialized with the serial number of
+ * the ogg stream before ogg packets can be submitted to it. This is not done
+ * here because the header structure is allocated before \ref
+ * oac_get_file_info() is called, and the serial number is not known at this
+ * point.
+ *
+ * \sa \ref oac_custom_header_init().
+ */
+struct oac_custom_header *oac_custom_header_new(void)
+{
+ return para_calloc(sizeof(struct oac_custom_header));
+}
+
+/**
+ * Set the serial number of an allocated header structure.
+ *
+ * \param serial Passed to the callback function.
+ * \param h As returned from \ref oac_custom_header_new().
+ *
+ * This function must be called before any packets are submitted.
+ */
+void oac_custom_header_init(int serial, struct oac_custom_header *h)
+{
+ ogg_stream_init(&h->oss, serial);
+}
+
+/**
+ * Submit an ogg packet to a custom header structure.
+ *
+ * \param op The packet to append.
+ * \param h Must be initialized.
+ *
+ * The packet may be the one which was passed to the callback, or a completely
+ * different one, like a dummy metadata packet.
+ *
+ * \return Standard.
+ */
+int oac_custom_header_append(ogg_packet *op, struct oac_custom_header *h)
+{
+ return ogg_stream_packetin(&h->oss, op) < 0? -E_OGG_PACKET_IN : 1;
+}
+
+/**
+ * Force remaining packets into an ogg page.
+ *
+ * \param h Should contain submitted but not yet flushed packets.
+ *
+ * This is called after the first packet has been submitted with \ref
+ * oac_custom_header_append() to make sure the first ogg page contains only
+ * this packet. Also when header processing is complete, the callbacks call
+ * this to force the previously submitted packets into a page.
+ */
+void oac_custom_header_flush(struct oac_custom_header *h)
+{
+ ogg_page og;
+
+ while (ogg_stream_flush(&h->oss, &og)) {
+ size_t len = og.header_len + og.body_len;
+ h->buf = para_realloc(h->buf, h->len + len);
+ memcpy(h->buf + h->len, og.header, og.header_len);
+ memcpy(h->buf + h->len + og.header_len, og.body, og.body_len);
+ h->len += len;
+ }
+}
+
+/**
+ * Return the custom header buffer and deallocate resources.
+ *
+ * This is called after the ogg packets which comprise the header have been
+ * submitted and flushed.
+ *
+ * \param buf Result pointer.
+ * \param h Must not be used any more after the call.
+ *
+ * \return The size of the header. This is the sum of the sizes of all ogg
+ * pages that have been flushed out.
+ */
+size_t oac_custom_header_get(char **buf, struct oac_custom_header *h)
+{
+ size_t ret = h->len;
+
+ *buf = h->buf;
+ ogg_stream_clear(&h->oss);
+ free(h);
+ return ret;
+}
projects / paraslash.git / blobdiff