Author: faust3
Date: Thu Jun 11 17:42:34 2009
New Revision: 4428
Log:
get rid of wma3.h
Deleted:
wmapro/wma3.h
Modified:
wmapro/wma3dec.c
Modified: wmapro/wma3dec.c
==============================================================================
--- wmapro/wma3dec.c Thu Jun 11 17:32:19 2009 (r4427)
+++ wmapro/wma3dec.c Thu Jun 11 17:42:34 2009 (r4428)
@@ -77,7 +77,29 @@
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
-#include "wma3.h"
+#include "wma3data.h"
+#include "dsputil.h"
+
+#ifdef TRACE
+#define DBG av_log
+#else
+#define DBG(...)
+#endif
+
+/** current decoder limitations */
+#define MAX_CHANNELS 8 ///< max number
of handled channels
+#define MAX_SUBFRAMES 32 ///< max number
of subframes per channel
+#define MAX_BANDS 29 ///< max number
of scale factor bands
+#define MAX_FRAMESIZE 16384 ///< maximum
compressed frame size
+#define MAX_FRAMEBITS (MAX_FRAMESIZE << 3) ///< maximum
frame size in bits
+
+/** size of block defines taken from wma.h */
+#define BLOCK_MIN_BITS 7 ///< log2 of min
block size
+#define BLOCK_MAX_BITS 12 ///< log2 of max
block size
+#define BLOCK_MIN_SIZE (1 << BLOCK_MIN_BITS) ///< minimum
block size
+#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS) ///< maximum
block size
+#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1) ///< possible
block sizes
+
#define VLCBITS 9
#define SCALEVLCBITS 8
@@ -95,11 +117,105 @@ static VLC vec1_vlc;
static VLC coef_vlc[2]; ///< coefficient run length vlc codes
static float sin64[33]; ///< sinus table for decorrelation
-#ifdef TRACE
-#define DBG av_log
-#else
-#define DBG(...)
-#endif
+/**
+ * @brief decoder context for a single channel
+ */
+typedef struct {
+ int16_t prev_block_len; ///< length of the
previous block
+ uint8_t transmit_coefs; ///< transmit
coefficients
+ uint8_t num_subframes; ///< number of subframes
+ uint16_t subframe_len[MAX_SUBFRAMES]; ///< subframe length in
samples
+ uint16_t subframe_offset[MAX_SUBFRAMES]; ///< subframe position
+ uint8_t cur_subframe; ///< subframe index
+ uint16_t channel_len; ///< channel length in
samples
+ uint16_t decoded_samples; ///< already processed
samples
+ uint8_t grouped; ///< channel is part of
a group
+ int quant_step; ///< quantization step
+ int8_t transmit_sf; ///< transmit scale
factors
+ int8_t reuse_sf; ///< share scale factors
between subframes
+ int8_t scale_factor_step; ///< scaling step
+ int max_scale_factor; ///< maximum scale factor
+ int scale_factors[MAX_BANDS]; ///< scale factor values
+ int resampled_scale_factors[MAX_BANDS]; ///< scale factors from
a previous block
+ int16_t scale_factor_block_len; ///< scale factor
reference block length
+ float* coeffs; ///< pointer to the
decode buffer
+ DECLARE_ALIGNED_16(float, out[2*BLOCK_MAX_SIZE]); ///< output buffer
+} WMA3ChannelCtx;
+
+/**
+ * @brief channel group for channel transformations
+ */
+typedef struct {
+ uint8_t num_channels; ///< number of
channels in the group
+ int8_t transform; ///< controls
the type of the transform
+ int8_t transform_band[MAX_BANDS]; ///< controls if
the transform is enabled for a certain band
+ float decorrelation_matrix[MAX_CHANNELS*MAX_CHANNELS]; ///<
decorrelation matrix
+ float* channel_data[MAX_CHANNELS]; ///<
transformation coefficients
+} WMA3ChannelGroup;
+
+/**
+ * @brief main decoder context
+ */
+typedef struct WMA3DecodeContext {
+ /** generic decoder variables */
+ AVCodecContext* avctx; ///< codec context for
av_log
+ DSPContext dsp; ///< accelerated dsp
functions
+ uint8_t frame_data[MAX_FRAMESIZE +
+ FF_INPUT_BUFFER_PADDING_SIZE];///< compressed frame data
+ MDCTContext mdct_ctx[BLOCK_NB_SIZES]; ///< MDCT context per
block size
+ DECLARE_ALIGNED_16(float, tmp[BLOCK_MAX_SIZE]); ///< imdct output buffer
+ float* windows[BLOCK_NB_SIZES]; ///< window per block size
+ int coef_max[2]; ///< max length of vlc
codes
+
+ /** frame size dependent frame information (set during initialization) */
+ uint8_t lossless; ///< lossless mode
+ uint32_t decode_flags; ///< used compression
features
+ uint8_t len_prefix; ///< frame is prefixed
with its length
+ uint8_t dynamic_range_compression; ///< frame contains DRC
data
+ uint8_t sample_bit_depth; ///< bits per sample
+ uint16_t samples_per_frame; ///< number of samples to
output
+ uint16_t log2_frame_size; ///< frame size
+ int8_t num_channels; ///< number of channels
+ int8_t lfe_channel; ///< lfe channel index
+ uint8_t max_num_subframes; ///< maximum number of
subframes
+ int8_t num_possible_block_sizes; ///< nb of supported block
sizes
+ uint16_t min_samples_per_subframe; ///< minimum samples per
subframe
+ int8_t* num_sfb; ///< scale factor bands
per block size
+ int16_t* sfb_offsets; ///< scale factor band
offsets
+ int16_t* sf_offsets; ///< scale factor resample
matrix
+ int16_t* subwoofer_cutoffs; ///< subwoofer cutoff
values
+
+ /** packet decode state */
+ 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
+ int subframe_offset; ///< subframe offset in
the bit reservoir
+ uint8_t packet_loss; ///< set in case of
bitstream error
+
+ /** frame decode state */
+ uint32_t frame_num; ///< current frame number
+ GetBitContext gb; ///< bitstream reader
context
+ int buf_bit_size; ///< buffer size in bits
+ int16_t* samples; ///< current samplebuffer
pointer
+ int16_t* samples_end; ///< maximum samplebuffer
pointer
+ uint8_t drc_gain; ///< gain for the DRC tool
+ int8_t skip_frame; ///< skip output step
+ int8_t parsed_all_subframes; ///< all subframes decoded?
+
+ /** subframe/block decode state */
+ int16_t subframe_len; ///< current subframe
length
+ int8_t channels_for_cur_subframe; ///< number of channels
that contain the subframe
+ int8_t channel_indexes_for_cur_subframe[MAX_CHANNELS];
+ int16_t cur_subwoofer_cutoff; ///< subwoofer cutoff value
+ int8_t num_bands; ///< number of scale
factor bands
+ int16_t* cur_sfb_offsets; ///< sfb offsets for the
current block
+ int8_t esc_len; ///< length of escaped
coefficients
+
+ uint8_t num_chgroups; ///< number of channel
groups
+ WMA3ChannelGroup chgroup[MAX_CHANNELS]; ///< channel group
information
+
+ WMA3ChannelCtx channel[MAX_CHANNELS]; ///< per channel data
+} WMA3DecodeContext;
/**
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