X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=ogg_afh.c;h=eaed16210678d7c9ba6082f733b54264db7e325f;hp=3056a819b209eff6118748b60137bc92dc684e5a;hb=99054bc0013b3592b311027662bbacb6df49a4e2;hpb=2df9761968e46b0e12106f2a0586a3a69103c4f1

diff --git a/ogg_afh.c b/ogg_afh.c
index 3056a819..eaed1621 100644
--- a/ogg_afh.c
+++ b/ogg_afh.c
@@ -25,7 +25,6 @@
 #include "server.cmdline.h"
 #include "server.h"
 #include "vss.h"
-#include "afh.h"
 #include "error.h"
 #include "string.h"
 
@@ -33,23 +32,57 @@
 #define CHUNK_SIZE 32768
 static double chunk_time = 0.25;
 
-FILE *audio_file;
-static int header_len;
-static char *header;
-static ssize_t *chunk_table;
-static struct audio_format_handler *af;
+struct ogg_datasource {
+	char *map;
+	off_t numbytes;
+	off_t fpos;
+};
 
 static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
 {
-	FILE *f = datasource;
-	return fread(buf, size, nmemb, f);
+	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(__a_unused void *datasource, ogg_int64_t offset,
+static int cb_seek(void *datasource, ogg_int64_t offset,
 		int whence)
 {
-	FILE *f = datasource;
-	return fseek(f, offset, whence);
+	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;
+		}
+		ods->fpos += offset;
+		return 0;
+	}
+	errno = EINVAL;
+	return -1;
 }
 
 /* don't do anything as vss still needs the open filehandle */
@@ -58,13 +91,13 @@ static int cb_close(__a_unused void *datasource)
 	return 0;
 }
 
-long cb_tell(void *datasource)
+static long cb_tell(void *datasource)
 {
-	FILE *f = datasource;
-	return ftell(f);
+	struct ogg_datasource *ods = datasource;
+	return (unsigned long)ods->fpos;
 }
 
-int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
+static int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
 {
 	int ret = ov_open_callbacks(datasource, vf,
 		NULL, /* no initial buffer */
@@ -86,9 +119,16 @@ int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
 
 }
 
-static int ogg_compute_header_len(FILE *file)
+static void ogg_save_header(char *map, struct audio_format_info *afi)
+{
+	afi->header = para_malloc(afi->header_len);
+	memcpy(afi->header, map, afi->header_len);
+}
+
+static int ogg_compute_header_len(char *map, off_t numbytes,
+		struct audio_format_info *afi)
 {
-	int ret, len, in = fileno(file);
+	int ret, len = PARA_MIN(numbytes, CHUNK_SIZE);
 	unsigned int serial;
 	char *buf;
 	ogg_page page;
@@ -102,11 +142,8 @@ static int ogg_compute_header_len(FILE *file)
 	ogg_sync_init(sync_in);
 	vorbis_info_init(&vi);
 	vorbis_comment_init(&vc);
-	buf = ogg_sync_buffer(sync_in, CHUNK_SIZE);
-	len = read(in, buf, CHUNK_SIZE);
-	ret = -E_OGG_READ;
-	if (len <= 0)
-		goto err1;
+	buf = ogg_sync_buffer(sync_in, len);
+	memcpy(buf, map, len);
 	ogg_sync_wrote(sync_in, len);
 	ret = -E_SYNC_PAGEOUT;
 	if (ogg_sync_pageout(sync_in, &page) <= 0)
@@ -148,11 +185,12 @@ static int ogg_compute_header_len(FILE *file)
 	ogg_stream_packetout(stream_in, &packet);
 	ogg_stream_packetin(stream_out, &packet);
 
-	header_len = 0;
+	afi->header_len = 0;
 	while (ogg_stream_flush(stream_out, &page))
-		header_len += page.body_len + page.header_len;
-	ret = len;
-	PARA_INFO_LOG("header_len = %d\n", header_len);
+		afi->header_len += page.body_len + page.header_len;
+	PARA_INFO_LOG("header_len = %d\n", afi->header_len);
+	ogg_save_header(map, afi);
+	ret = 1;
 err2:
 	ogg_stream_destroy(stream_in);
 	ogg_stream_destroy(stream_out);
@@ -163,38 +201,13 @@ err1:
 	return ret;
 }
 
-static void tunetable(long unsigned num_chunks)
-{
-	int i = 1, j = -1, lp = 1;
-	while (i < num_chunks) {
-		if (chunk_table[i] == chunk_table[lp]) {
-			i++;
-			continue;
-		}
-		if (j < 0)
-			tv_scale(i, &af->chunk_tv, &af->eof_tv);
-		for (j = lp; j < i; j++)
-			chunk_table[j] = chunk_table[i];
-		lp = i;
-	}
-#if 1
-	for (i = 2; i < num_chunks; i++)
-		if (chunk_table[i] != chunk_table[1])
-			break;
-	lp = i;
-	for (i = 2; i < num_chunks - lp; i++)
-		chunk_table[i] = chunk_table[i + lp];
-#endif
-}
-
-
 /*
  * 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,
-	double time_total)
+	struct audio_format_info *afi, double time_total)
 {
 	int i, ret, num;
 	ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
@@ -205,8 +218,8 @@ static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
 	num = time_total / chunk_time + 3;
 	PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
 		chunk_time, num);
-	chunk_table = para_malloc(num * sizeof(size_t));
-	chunk_table[0] = 0;
+	afi->chunk_table = para_malloc(num * sizeof(size_t));
+	afi->chunk_table[0] = 0;
 	max_chunk_len = 0;
 	for (i = 1; ret == 0; i++) {
 		ogg_int64_t diff;
@@ -217,46 +230,25 @@ static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
 		diff = pos - old_pos;
 		max_chunk_len = PARA_MAX(max_chunk_len, diff);
 		min = (i == 1)? diff : PARA_MIN(min, diff);
-		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);
+		afi->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;
-	chunk_table[i] = pos;
-//	tunetable(num_chunks);
+	afi->chunk_table[i] = pos;
 	PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
 		num_chunks, chunk_time, max_chunk_len, min);
 	return num_chunks;
 }
 
-static void ogg_close_audio_file(void)
-{
-	free(header);
-	free(chunk_table);
-	fclose(audio_file);
-}
-
-static int ogg_save_header(FILE *file, int len)
-{
-	int ret;
-
-	header = para_malloc(len);
-	rewind(file);
-	ret = read(fileno(file), header, len);
-	if (ret == len)
-		return 1;
-	free(header);
-	return -E_OGG_READ;
-}
-
 /*
  * Init oggvorbis file and write some tech data to given pointers.
  */
-static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
-	int *seconds, size_t **vss_chunk_table)
+static int ogg_get_file_info(char *map, off_t numbytes,
+		struct audio_format_info *afi)
 {
 	int ret;
 	double time_total;
@@ -264,23 +256,18 @@ static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
 	ogg_int64_t raw_total;
 	long vi_sampling_rate, vi_bitrate;
 	OggVorbis_File of;
-	static const ov_callbacks ovc = {
+	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};
 
-	if (!file)
-		return -E_OGG_NO_FILE;
-	ret = ogg_compute_header_len(file);
-	if (ret < 0)
-		return ret;
-	ret = ogg_save_header(file, header_len);
+	ret = ogg_compute_header_len(map, numbytes, afi);
 	if (ret < 0)
 		return ret;
-	rewind(file);
-	ret = ogg_open_callbacks(file, &of, ovc);
+	ret = ogg_open_callbacks(&ods, &of, ovc);
 	if (ret < 0)
 		goto err;
 	ret = -E_OGG_INFO;
@@ -289,50 +276,37 @@ static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
 		goto err;
 	time_total = ov_time_total(&of, -1);
 	raw_total = ov_raw_total(&of, -1);
-	*seconds = time_total;
+	afi->seconds_total = time_total;
 	vi_sampling_rate = vi->rate;
 	vi_bitrate = ov_bitrate(&of, 0);
-	rewind(file);
-	*frames = ogg_compute_chunk_table(&of, time_total);
-	rewind(file);
-	*vss_chunk_table = chunk_table;
-	sprintf(info_str, "audio_file_info1:%lu x %lu, %ldkHz, %d channels, %ldkbps\n"
+	afi->chunks_total = ogg_compute_chunk_table(&of, afi, time_total);
+	sprintf(afi->info_string, "audio_file_info1:%lu x %lu, %ldkHz, "
+		"%d channels, %ldkbps\n"
 		"audio_file_info2: \n"
 		"audio_file_info3: \n",
-		*frames, (long unsigned) (chunk_time * 1000 * 1000),
+		afi->chunks_total, (long unsigned) (chunk_time * 1000 * 1000),
 		vi_sampling_rate / 1000, vi->channels, vi_bitrate / 1000
 		);
-	rewind(file);
-	audio_file = file;
+	afi->chunk_tv.tv_sec = 0;
+	afi->chunk_tv.tv_usec = 250 * 1000;
+	tv_scale(3, &afi->chunk_tv, &afi->eof_tv);
 	ret = 1;
 err:
 	ov_clear(&of); /* keeps the file open */
 	if (ret < 0)
-		free(header);
+		free(afi->header);
 	return ret;
 }
 
-static char *ogg_get_header_info(int *len)
-{
-	*len = header_len;
-	return header;
-}
-
 static const char* ogg_suffixes[] = {"ogg", NULL};
 
 /**
  * the init function of the ogg vorbis audio format handler
  *
- * \param p pointer to the struct to initialize
+ * \param afh pointer to the struct to initialize
  */
-void ogg_init(struct audio_format_handler *p)
+void ogg_init(struct audio_format_handler *afh)
 {
-	af = p;
-	af->get_file_info = ogg_get_file_info,
-	af->close_audio_file = ogg_close_audio_file;
-	af->get_header_info = ogg_get_header_info;
-	af->chunk_tv.tv_sec = 0;
-	af->chunk_tv.tv_usec = 250 * 1000;
-	tv_scale(3, &af->chunk_tv, &af->eof_tv);
-	af->suffixes = ogg_suffixes;
+	afh->get_file_info = ogg_get_file_info,
+	afh->suffixes = ogg_suffixes;
 }