X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=aacdec.c;h=c7bec16479ae1373f05cfa0118da8af36eee0c72;hp=315f338ced283c063d9012e20040fb0b3f0b82a1;hb=ede4d4615c5a0e41a1dffc83ad78e9aabe1d57a3;hpb=d2f8a4ab39aa44d565ef04e2d4792b1dea49ab0e

diff --git a/aacdec.c b/aacdec.c
index 315f338c..c7bec164 100644
--- a/aacdec.c
+++ b/aacdec.c
@@ -21,7 +21,7 @@
  * Ahead Software AG
  */
 
-/** \file aacdec.c paraslash's mp3 decoder */
+/** \file aacdec.c paraslash's aac (m4a) decoder */
 
 #include "para.h"
 
@@ -31,8 +31,8 @@
 #include "string.h"
 #include "aac.h"
 
-/** the output buffer size */
 #define MAX_CHANNELS 6
+/** the output buffer size */
 #define AAC_OUTBUF_SIZE (FAAD_MIN_STREAMSIZE * MAX_CHANNELS)
 
 /**
@@ -40,51 +40,49 @@
  *
  * \sa filter, filter_node
  */
-struct private_mp4dec_data {
-	NeAACDecHandle decoder;
+struct private_aacdec_data {
+	NeAACDecHandle handle;
 	NeAACDecFrameInfo frame_info;
 
 	int initialized;
 	int decoder_length;
-	int consumed;
 	long unsigned consumed_total;
-
 	long unsigned entry;
 };
 
-static ssize_t mp4dec(char *input_buffer, size_t len, struct filter_node *fn)
+static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn)
 {
-	struct private_mp4dec_data *padd = fn->private_data;
+	struct private_aacdec_data *padd = fn->private_data;
 	struct filter_chain_info *fci = fn->fci;
-	unsigned long rate = 0;
-	unsigned char channels = 0;
 	int i, ret, skip;
 	unsigned char *p, *outbuffer;
 	unsigned char *inbuf = (unsigned char*)input_buffer;
+	size_t consumed = 0;
 
 	if (fn->loaded > fn->bufsize * 4 / 5)
 		return 0;
 	if (len < 1000 && !*fci->eof)
 		return 0;
-	padd->consumed = 0;
 
 	if (!padd->initialized) {
+		unsigned long rate = 0;
+		unsigned char channels = 0;
 		padd->decoder_length = aac_find_esds(inbuf, len, &skip);
 		PARA_INFO_LOG("decoder len: %d\n", padd->decoder_length);
 		if (padd->decoder_length < 0) {
-			ret = NeAACDecInit(padd->decoder, inbuf,
+			ret = NeAACDecInit(padd->handle, inbuf,
 				len, &rate, &channels);
 			PARA_INFO_LOG("decoder init: %d\n", ret);
 			if (ret < 0) {
 				ret = -E_AACDEC_INIT;
 				goto out;
 			}
-			padd->consumed = ret;
+			consumed = ret;
 		} else {
-			padd->consumed += skip;
-			p = inbuf + padd->consumed;
+			consumed += skip;
+			p = inbuf + consumed;
 			ret = -E_AACDEC_INIT;
-			if (NeAACDecInit2(padd->decoder, p,
+			if (NeAACDecInit2(padd->handle, p,
 					padd->decoder_length, &rate,
 					&channels) < 0)
 				goto out;
@@ -96,44 +94,44 @@ static ssize_t mp4dec(char *input_buffer, size_t len, struct filter_node *fn)
 		padd->initialized = 1;
 	}
 	if (padd->decoder_length > 0) {
-		padd->consumed = 0;
+		consumed = 0;
 		if (!padd->entry) {
-			ret = aac_find_stco(inbuf + padd->consumed,
-				len - padd->consumed, &skip);
+			ret = aac_find_stco(inbuf + consumed, len - consumed,
+				&skip);
 			if (ret < 0) {
 				ret = len;
 				goto out;
 			}
-			padd->consumed += skip;
-			padd->entry = aac_read_int32(inbuf + padd->consumed);
+			consumed += skip;
+			padd->entry = aac_read_int32(inbuf + consumed);
 			PARA_INFO_LOG("entry: %lu\n", padd->entry);
 		}
 		ret = len;
 		if (padd->consumed_total + len < padd->entry)
 			goto out;
 		if (padd->consumed_total < padd->entry)
-			padd->consumed = padd->entry - padd->consumed_total;
+			consumed = padd->entry - padd->consumed_total;
 	}
-	for (; padd->consumed < len; padd->consumed++)
-		if ((inbuf[padd->consumed] & 0xfe) == 0x20)
+	for (; consumed < len;consumed++)
+		if ((inbuf[consumed] & 0xfe) == 0x20)
 			break;
-	if (padd->consumed >= len)
+	if (consumed >= len)
 		goto success;
-	p = inbuf + padd->consumed;
-	outbuffer = NeAACDecDecode(padd->decoder, &padd->frame_info, p,
-		len - padd->consumed);
+	p = inbuf + consumed;
+	outbuffer = NeAACDecDecode(padd->handle, &padd->frame_info, p,
+		len - consumed);
 	ret = -E_AAC_DECODE;
 	if (padd->frame_info.error != 0) {
 		PARA_ERROR_LOG("frame_error: %d, consumed: %lu + %d + %lu\n",
 			padd->frame_info.error, padd->consumed_total,
-			padd->consumed, padd->frame_info.bytesconsumed);
+			consumed, padd->frame_info.bytesconsumed);
 		PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
 			padd->frame_info.error));
-		padd->consumed++; /* catch 21 */
+		consumed++; /* catch 21 */
 		goto success;
 	}
-	padd->consumed += padd->frame_info.bytesconsumed;
-	ret = padd->consumed;
+	consumed += padd->frame_info.bytesconsumed;
+	ret = consumed;
 	if (!padd->frame_info.samples)
 		goto out;
 	for (i = 0; i < padd->frame_info.samples; i++) {
@@ -142,28 +140,28 @@ static ssize_t mp4dec(char *input_buffer, size_t len, struct filter_node *fn)
 		fn->buf[fn->loaded++] = (s[i] >> 8) & 0xff;
 	}
 success:
-	ret = padd->consumed;
+	ret = consumed;
 out:
 	if (ret > 0)
 		padd->consumed_total += ret;
 	return ret;
 }
 
-static void mp4dec_open(struct filter_node *fn)
+static void aacdec_open(struct filter_node *fn)
 {
-	fn->private_data = para_calloc(sizeof(struct private_mp4dec_data));
-	struct private_mp4dec_data *padd = fn->private_data;
+	fn->private_data = para_calloc(sizeof(struct private_aacdec_data));
+	struct private_aacdec_data *padd = fn->private_data;
 
 	fn->bufsize = AAC_OUTBUF_SIZE;
 	fn->buf = para_calloc(fn->bufsize);
-	padd->decoder = aac_open();
+	padd->handle = aac_open();
 }
 
-static void mp4dec_close(struct filter_node *fn)
+static void aacdec_close(struct filter_node *fn)
 {
-	struct private_mp4dec_data *padd = fn->private_data;
+	struct private_aacdec_data *padd = fn->private_data;
 
-	NeAACDecClose(padd->decoder);
+	NeAACDecClose(padd->handle);
 	free(fn->buf);
 	fn->buf = NULL;
 	free(padd);
@@ -171,13 +169,13 @@ static void mp4dec_close(struct filter_node *fn)
 }
 
 /**
- * the init function of the mp3dec filter
+ * the init function of the aacdec filter
  *
  * \sa filter::init
  */
 void aacdec_init(struct filter *f)
 {
-	f->open = mp4dec_open;
-	f->convert = mp4dec;
-	f->close = mp4dec_close;
+	f->open = aacdec_open;
+	f->convert = aacdec;
+	f->close = aacdec_close;
 }