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authorSascha Sommer <saschasommer@freenet.de>2009-09-05 09:56:06 +0000
committerSascha Sommer <saschasommer@freenet.de>2009-09-05 09:56:06 +0000
commit201693247247cfef89cbc8cb80f0b14bb1552b88 (patch)
tree99389c8b0db95f2e1f0da336c92544e7a2a0be43 /libavcodec/wmaprodec.c
parentd2a47a578edde9020575fbe8029912ad219f927e (diff)
downloadffmpeg-201693247247cfef89cbc8cb80f0b14bb1552b88.tar.gz
store packet GetBitContext in the decoder context
Originally committed as revision 19762 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/wmaprodec.c')
-rw-r--r--libavcodec/wmaprodec.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 495e27a324..cf8fa32619 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -188,6 +188,7 @@ typedef struct WMAProDecodeCtx {
int16_t subwoofer_cutoffs[WMAPRO_BLOCK_SIZES]; ///< subwoofer cutoff values
/* packet decode state */
+ GetBitContext pgb; ///< bitstream reader context for the packet
uint8_t packet_sequence_number; ///< current packet number
int num_saved_bits; ///< saved number of bits
int frame_offset; ///< frame offset in the bit reservoir
@@ -1441,8 +1442,8 @@ static void save_bits(WMAProDecodeCtx *s, GetBitContext* gb, int len,
static int decode_packet(AVCodecContext *avctx,
void *data, int *data_size, AVPacket* avpkt)
{
- GetBitContext gb;
WMAProDecodeCtx *s = avctx->priv_data;
+ GetBitContext* gb = &s->pgb;
const uint8_t* buf = avpkt->data;
int buf_size = avpkt->size;
int more_frames = 1;
@@ -1463,12 +1464,12 @@ static int decode_packet(AVCodecContext *avctx,
buf_size = avctx->block_align;
/** parse packet header */
- init_get_bits(&gb, buf, s->buf_bit_size);
- packet_sequence_number = get_bits(&gb, 4);
- skip_bits(&gb, 2);
+ init_get_bits(gb, buf, s->buf_bit_size);
+ packet_sequence_number = get_bits(gb, 4);
+ skip_bits(gb, 2);
/** get number of bits that need to be added to the previous frame */
- num_bits_prev_frame = get_bits(&gb, s->log2_frame_size);
+ num_bits_prev_frame = get_bits(gb, s->log2_frame_size);
dprintf(avctx, "packet[%d]: nbpf %x\n", avctx->frame_number,
num_bits_prev_frame);
@@ -1484,7 +1485,7 @@ static int decode_packet(AVCodecContext *avctx,
if (num_bits_prev_frame > 0) {
/** append the previous frame data to the remaining data from the
previous packet to create a full frame */
- save_bits(s, &gb, num_bits_prev_frame, 1);
+ save_bits(s, gb, num_bits_prev_frame, 1);
dprintf(avctx, "accumulated %x bits of frame data\n",
s->num_saved_bits - s->frame_offset);
@@ -1499,12 +1500,12 @@ static int decode_packet(AVCodecContext *avctx,
s->packet_loss = 0;
/** decode the rest of the packet */
while (!s->packet_loss && more_frames &&
- remaining_bits(s, &gb) > s->log2_frame_size) {
- int frame_size = show_bits(&gb, s->log2_frame_size);
+ remaining_bits(s, gb) > s->log2_frame_size) {
+ int frame_size = show_bits(gb, s->log2_frame_size);
/** there is enough data for a full frame */
- if (remaining_bits(s, &gb) >= frame_size && frame_size > 0) {
- save_bits(s, &gb, frame_size, 0);
+ if (remaining_bits(s, gb) >= frame_size && frame_size > 0) {
+ save_bits(s, gb, frame_size, 0);
/** decode the frame */
more_frames = decode_frame(s);
@@ -1516,10 +1517,10 @@ static int decode_packet(AVCodecContext *avctx,
more_frames = 0;
}
- if (!s->packet_loss && remaining_bits(s, &gb) > 0) {
+ if (!s->packet_loss && remaining_bits(s, gb) > 0) {
/** save the rest of the data so that it can be decoded
with the next packet */
- save_bits(s, &gb, remaining_bits(s, &gb), 0);
+ save_bits(s, gb, remaining_bits(s, gb), 0);
}
*data_size = (int8_t *)s->samples - (int8_t *)data;