Rename struct rtp_payload to rtp_sbc_payload as it is specific for SBC
codec. Add proper checks for endianity in rtp.h header and use uint8_t type
where appropriated. And because rtp_sbc_payload structure is not parsed by
decoder there is no support for fragmented SBC frames. Add warning for it.
---
src/modules/bluetooth/a2dp-codec-sbc.c | 16 ++++++----
src/modules/bluetooth/rtp.h | 58 +++++++++++++++++++---------------
2 files changed, 42 insertions(+), 32 deletions(-)
diff --git a/src/modules/bluetooth/a2dp-codec-sbc.c b/src/modules/bluetooth/a2dp-codec-sbc.c
index f339b570d..6ab0b46cd 100644
--- a/src/modules/bluetooth/a2dp-codec-sbc.c
+++ b/src/modules/bluetooth/a2dp-codec-sbc.c
@@ -480,7 +480,7 @@ static void reset(void *codec_info) {
static void get_buffer_size(void *codec_info, size_t link_mtu, size_t *decoded_buffer_size, size_t *encoded_buffer_size) {
struct sbc_info *sbc_info = (struct sbc_info *) codec_info;
- size_t rtp_size = sizeof(struct rtp_header) + sizeof(struct rtp_payload);
+ size_t rtp_size = sizeof(struct rtp_header) + sizeof(struct rtp_sbc_payload);
size_t num_of_frames = (link_mtu - rtp_size) / sbc_info->frame_length;
*decoded_buffer_size = num_of_frames * sbc_info->codesize;
@@ -510,14 +510,14 @@ static int reduce_encoder_bitrate(void *codec_info) {
static size_t encode_buffer(void *codec_info, uint32_t timestamp, const uint8_t *input_buffer, size_t input_size, uint8_t *output_buffer, size_t output_size, size_t *processed) {
struct sbc_info *sbc_info = (struct sbc_info *) codec_info;
struct rtp_header *header;
- struct rtp_payload *payload;
+ struct rtp_sbc_payload *payload;
uint8_t *d;
const uint8_t *p;
size_t to_write, to_encode;
unsigned frame_count;
header = (struct rtp_header*) output_buffer;
- payload = (struct rtp_payload*) (output_buffer + sizeof(*header));
+ payload = (struct rtp_sbc_payload*) (output_buffer + sizeof(*header));
frame_count = 0;
@@ -562,7 +562,7 @@ static size_t encode_buffer(void *codec_info, uint32_t timestamp, const uint8_t
} PA_ONCE_END;
/* write it to the fifo */
- memset(output_buffer, 0, sizeof(*header) + sizeof(*payload));
+ pa_memzero(output_buffer, sizeof(*header) + sizeof(*payload));
header->v = 2;
/* A2DP spec: "A payload type in the RTP dynamic range shall be chosen".
@@ -583,13 +583,17 @@ static size_t decode_buffer(void *codec_info, const uint8_t *input_buffer, size_
struct sbc_info *sbc_info = (struct sbc_info *) codec_info;
struct rtp_header *header;
- struct rtp_payload *payload;
+ struct rtp_sbc_payload *payload;
const uint8_t *p;
uint8_t *d;
size_t to_write, to_decode;
header = (struct rtp_header *) input_buffer;
- payload = (struct rtp_payload*) (input_buffer + sizeof(*header));
+ payload = (struct rtp_sbc_payload*) (input_buffer + sizeof(*header));
+
+ /* TODO: Add support for decoding fragmented SBC frames */
+ if (payload->is_fragmented)
+ pa_log_warn("SBC frame is fragmented, decoding may fail");
p = input_buffer + sizeof(*header) + sizeof(*payload);
to_decode = input_size - sizeof(*header) - sizeof(*payload);
diff --git a/src/modules/bluetooth/rtp.h b/src/modules/bluetooth/rtp.h
index 20694c1e1..813d9e390 100644
--- a/src/modules/bluetooth/rtp.h
+++ b/src/modules/bluetooth/rtp.h
@@ -3,6 +3,7 @@
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@xxxxxxxxxxxx>
+ * Copyright (C) 2019 Pali Rohár <pali.rohar@xxxxxxxxx>
*
*
* This library is free software; you can redistribute it and/or
@@ -19,16 +20,20 @@
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#include <endian.h>
+#include <stdint.h>
+
+#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
+ __BYTE_ORDER == __LITTLE_ENDIAN
struct rtp_header {
- unsigned cc:4;
- unsigned x:1;
- unsigned p:1;
- unsigned v:2;
+ uint8_t cc:4;
+ uint8_t x:1;
+ uint8_t p:1;
+ uint8_t v:2;
- unsigned pt:7;
- unsigned m:1;
+ uint8_t pt:7;
+ uint8_t m:1;
uint16_t sequence_number;
uint32_t timestamp;
@@ -36,24 +41,25 @@ struct rtp_header {
uint32_t csrc[0];
} __attribute__ ((packed));
-struct rtp_payload {
- unsigned frame_count:4;
- unsigned rfa0:1;
- unsigned is_last_fragment:1;
- unsigned is_first_fragment:1;
- unsigned is_fragmented:1;
+struct rtp_sbc_payload {
+ uint8_t frame_count:4;
+ uint8_t rfa0:1;
+ uint8_t is_last_fragment:1;
+ uint8_t is_first_fragment:1;
+ uint8_t is_fragmented:1;
} __attribute__ ((packed));
-#elif __BYTE_ORDER == __BIG_ENDIAN
+#elif defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \
+ __BYTE_ORDER == __BIG_ENDIAN
struct rtp_header {
- unsigned v:2;
- unsigned p:1;
- unsigned x:1;
- unsigned cc:4;
+ uint8_t v:2;
+ uint8_t p:1;
+ uint8_t x:1;
+ uint8_t cc:4;
- unsigned m:1;
- unsigned pt:7;
+ uint8_t m:1;
+ uint8_t pt:7;
uint16_t sequence_number;
uint32_t timestamp;
@@ -61,12 +67,12 @@ struct rtp_header {
uint32_t csrc[0];
} __attribute__ ((packed));
-struct rtp_payload {
- unsigned is_fragmented:1;
- unsigned is_first_fragment:1;
- unsigned is_last_fragment:1;
- unsigned rfa0:1;
- unsigned frame_count:4;
+struct rtp_sbc_payload {
+ uint8_t is_fragmented:1;
+ uint8_t is_first_fragment:1;
+ uint8_t is_last_fragment:1;
+ uint8_t rfa0:1;
+ uint8_t frame_count:4;
} __attribute__ ((packed));
#else
--
2.11.0
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