* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+
+/**
+ * @file wmadec.c
+ * WMA compatible decoder.
+ * This decoder handles Microsoft Windows Media Audio data, versions 1 & 2.
+ * WMA v1 is identified by audio format 0x160 in Microsoft media files
+ * (ASF/AVI/WAV). WMA v2 is identified by audio format 0x161.
+ *
+ * To use this decoder, a calling application must supply the extra data
+ * bytes provided with the WMA data. These are the extra, codec-specific
+ * bytes at the end of a WAVEFORMATEX data structure. Transmit these bytes
+ * to the decoder using the extradata[_size] fields in AVCodecContext. There
+ * should be 4 extra bytes for v1 data and 6 extra bytes for v2 data.
+ */
+
#include "avcodec.h"
+#include "bitstream.h"
#include "dsputil.h"
-//#define DEBUG_PARAMS
-//#define DEBUG_TRACE
-
/* size of blocks */
#define BLOCK_MIN_BITS 7
#define BLOCK_MAX_BITS 11
int block_pos; /* current position in frame */
uint8_t ms_stereo; /* true if mid/side stereo mode */
uint8_t channel_coded[MAX_CHANNELS]; /* true if channel is coded */
- float exponents[MAX_CHANNELS][BLOCK_MAX_SIZE];
+ float exponents[MAX_CHANNELS][BLOCK_MAX_SIZE] __attribute__((aligned(16)));
float max_exponent[MAX_CHANNELS];
int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
- float coefs[MAX_CHANNELS][BLOCK_MAX_SIZE];
+ float coefs[MAX_CHANNELS][BLOCK_MAX_SIZE] __attribute__((aligned(16)));
MDCTContext mdct_ctx[BLOCK_NB_SIZES];
float *windows[BLOCK_NB_SIZES];
- FFTSample mdct_tmp[BLOCK_MAX_SIZE]; /* temporary storage for imdct */
+ FFTSample mdct_tmp[BLOCK_MAX_SIZE] __attribute__((aligned(16))); /* temporary storage for imdct */
/* output buffer for one frame and the last for IMDCT windowing */
- float frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE * 2];
+ float frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE * 2] __attribute__((aligned(16)));
/* last frame info */
uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4]; /* padding added */
int last_bitoffset;
float lsp_pow_e_table[256];
float lsp_pow_m_table1[(1 << LSP_POW_BITS)];
float lsp_pow_m_table2[(1 << LSP_POW_BITS)];
+
+#ifdef TRACE
+ int frame_count;
+#endif
} WMADecodeContext;
typedef struct CoefVLCTable {
#include "wmadata.h"
-#ifdef DEBUG_TRACE
-
-int frame_count;
-
-static FILE *flog;
-
-void trace(const char *fmt, ...)
-{
- va_list ap;
-
-
- if (!flog) {
- flog = fopen("/tmp/out.log", "w");
- setlinebuf(flog);
- }
-
- va_start(ap, fmt);
- vfprintf(flog, fmt, ap);
- va_end(ap);
-}
-
-#define get_bits(s, n) get_bits_trace(s, n)
-#define get_vlc(s, vlc) get_vlc_trace(s, vlc)
-
-unsigned int get_bits_trace(GetBitContext *s, int n)
-{
- unsigned int val;
- val = (get_bits)(s, n);
- trace("get_bits(%d) : 0x%x\n", n, val);
- return val;
-}
-
-static int get_vlc_trace(GetBitContext *s, VLC *vlc)
-{
- int code;
- code = (get_vlc)(s, vlc);
- trace("get_vlc() : %d\n", code);
- return code;
-}
-
+#ifdef TRACE
static void dump_shorts(const char *name, const short *tab, int n)
{
int i;
- trace("%s[%d]:\n", name, n);
+ tprintf("%s[%d]:\n", name, n);
for(i=0;i<n;i++) {
if ((i & 7) == 0)
- trace("%4d: ", i);
- trace(" %5d.0", tab[i]);
+ tprintf("%4d: ", i);
+ tprintf(" %5d.0", tab[i]);
if ((i & 7) == 7)
- trace("\n");
+ tprintf("\n");
}
}
{
int i;
- trace("%s[%d]:\n", name, n);
+ tprintf("%s[%d]:\n", name, n);
for(i=0;i<n;i++) {
if ((i & 7) == 0)
- trace("%4d: ", i);
- trace(" %8.*f", prec, tab[i]);
+ tprintf("%4d: ", i);
+ tprintf(" %8.*f", prec, tab[i]);
if ((i & 7) == 7)
- trace("\n");
+ tprintf("\n");
}
if ((i & 7) != 0)
- trace("\n");
+ tprintf("\n");
}
-
-#else
-
-#define trace(fmt, ...)
-
#endif
/* XXX: use same run/length optimization as mpeg decoders */
const uint16_t *p;
int i, l, j, level;
- init_vlc(vlc, 9, n, table_bits, 1, 1, table_codes, 4, 4);
+ init_vlc(vlc, 9, n, table_bits, 1, 1, table_codes, 4, 4, 0);
- run_table = malloc(n * sizeof(uint16_t));
- level_table = malloc(n * sizeof(uint16_t));
+ run_table = av_malloc(n * sizeof(uint16_t));
+ level_table = av_malloc(n * sizeof(uint16_t));
p = levels_table;
i = 2;
level = 1;
int i, flags1, flags2;
float *window;
uint8_t *extradata;
- float bps1, high_freq, bps;
+ float bps1, high_freq;
+ volatile float bps;
int sample_rate1;
int coef_vlc_table;
s->bit_rate = avctx->bit_rate;
s->block_align = avctx->block_align;
- if (avctx->codec_id == CODEC_ID_WMAV1) {
+ if (avctx->codec->id == CODEC_ID_WMAV1) {
s->version = 1;
} else {
s->version = 2;
}
s->frame_len = 1 << s->frame_len_bits;
if (s->use_variable_block_len) {
- s->nb_block_sizes = s->frame_len_bits - BLOCK_MIN_BITS + 1;
+ int nb_max, nb;
+ nb = ((flags2 >> 3) & 3) + 1;
+ if ((s->bit_rate / s->nb_channels) >= 32000)
+ nb += 2;
+ nb_max = s->frame_len_bits - BLOCK_MIN_BITS;
+ if (nb > nb_max)
+ nb = nb_max;
+ s->nb_block_sizes = nb + 1;
} else {
s->nb_block_sizes = 1;
}
high_freq = high_freq * 0.5;
}
}
-#ifdef DEBUG_PARAMS
- printf("flags1=0x%x flags2=0x%x\n", flags1, flags2);
- printf("version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
+ dprintf("flags1=0x%x flags2=0x%x\n", flags1, flags2);
+ dprintf("version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
s->version, s->nb_channels, s->sample_rate, s->bit_rate,
s->block_align);
- printf("bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
+ dprintf("bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
bps, bps1, high_freq, s->byte_offset_bits);
- printf("use_noise_coding=%d use_exp_vlc=%d\n",
- s->use_noise_coding, s->use_exp_vlc);
-#endif
+ dprintf("use_noise_coding=%d use_exp_vlc=%d nb_block_sizes=%d\n",
+ s->use_noise_coding, s->use_exp_vlc, s->nb_block_sizes);
/* compute the scale factor band sizes for each MDCT block size */
{
}
s->exponent_high_sizes[k] = j;
#if 0
- trace("%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",
+ tprintf("%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",
s->frame_len >> k,
s->coefs_end[k],
s->high_band_start[k],
s->exponent_high_sizes[k]);
for(j=0;j<s->exponent_high_sizes[k];j++)
- trace(" %d", s->exponent_high_bands[k][j]);
- trace("\n");
+ tprintf(" %d", s->exponent_high_bands[k][j]);
+ tprintf("\n");
#endif
}
}
-#ifdef DEBUG_TRACE
+#ifdef TRACE
{
int i, j;
for(i = 0; i < s->nb_block_sizes; i++) {
- trace("%5d: n=%2d:",
+ tprintf("%5d: n=%2d:",
s->frame_len >> i,
s->exponent_sizes[i]);
for(j=0;j<s->exponent_sizes[i];j++)
- trace(" %d", s->exponent_bands[i][j]);
- trace("\n");
+ tprintf(" %d", s->exponent_bands[i][j]);
+ tprintf("\n");
}
}
#endif
else
s->noise_mult = 0.04;
-#if defined(DEBUG_TRACE)
+#ifdef TRACE
for(i=0;i<NOISE_TAB_SIZE;i++)
s->noise_table[i] = 1.0 * s->noise_mult;
#else
#endif
init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits),
hgain_huffbits, 1, 1,
- hgain_huffcodes, 2, 2);
+ hgain_huffcodes, 2, 2, 0);
}
if (s->use_exp_vlc) {
init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits),
scale_huffbits, 1, 1,
- scale_huffcodes, 4, 4);
+ scale_huffcodes, 4, 4, 0);
} else {
wma_lsp_to_curve_init(s, s->frame_len);
}
int n, v, a, ch, code, bsize;
int coef_nb_bits, total_gain, parse_exponents;
float window[BLOCK_MAX_SIZE * 2];
+// XXX: FIXME!! there's a bug somewhere which makes this mandatory under altivec
+#ifdef HAVE_ALTIVEC
+ volatile int nb_coefs[MAX_CHANNELS] __attribute__((aligned(16)));
+#else
int nb_coefs[MAX_CHANNELS];
+#endif
float mdct_norm;
- trace("***decode_block: %d:%d\n", frame_count - 1, s->block_num);
+#ifdef TRACE
+ tprintf("***decode_block: %d:%d\n", s->frame_count - 1, s->block_num);
+#endif
/* compute current block length */
if (s->use_variable_block_len) {
}
exp_power[j] = e2 / n;
last_high_band = j;
- trace("%d: power=%f (%d)\n", j, exp_power[j], n);
+ tprintf("%d: power=%f (%d)\n", j, exp_power[j], n);
}
exp_ptr += n;
}
}
}
-#ifdef DEBUG_TRACE
+#ifdef TRACE
for(ch = 0; ch < s->nb_channels; ch++) {
if (s->channel_coded[ch]) {
dump_floats("exponents", 3, s->exponents[ch], s->block_len);
/* no need to optimize this case because it should almost
never happen */
if (!s->channel_coded[0]) {
-#ifdef DEBUG_TRACE
- trace("rare ms-stereo case happened\n");
-#endif
+ tprintf("rare ms-stereo case happened\n");
memset(s->coefs[0], 0, sizeof(float) * s->block_len);
s->channel_coded[0] = 1;
}
for(ch = 0; ch < s->nb_channels; ch++) {
if (s->channel_coded[ch]) {
- FFTSample output[BLOCK_MAX_SIZE * 2];
+ FFTSample output[BLOCK_MAX_SIZE * 2] __attribute__((aligned(16)));
float *ptr;
int i, n4, index, n;
int16_t *ptr;
float *iptr;
- trace("***decode_frame: %d size=%d\n", frame_count++, s->frame_len);
+#ifdef TRACE
+ tprintf("***decode_frame: %d size=%d\n", s->frame_count++, s->frame_len);
+#endif
/* read each block */
s->block_num = 0;
s->frame_len * sizeof(float));
}
-#ifdef DEBUG_TRACE
+#ifdef TRACE
dump_shorts("samples", samples, n * s->nb_channels);
#endif
return 0;
static int wma_decode_superframe(AVCodecContext *avctx,
void *data, int *data_size,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
WMADecodeContext *s = avctx->priv_data;
int nb_frames, bit_offset, i, pos, len;
uint8_t *q;
int16_t *samples;
- trace("***decode_superframe:\n");
+ tprintf("***decode_superframe:\n");
+ if(buf_size==0){
+ s->last_superframe_len = 0;
+ return 0;
+ }
+
samples = data;
- init_get_bits(&s->gb, buf, buf_size);
+ init_get_bits(&s->gb, buf, buf_size*8);
if (s->use_bit_reservoir) {
/* read super frame header */
/* add bit_offset bits to last frame */
if ((s->last_superframe_len + ((bit_offset + 7) >> 3)) >
MAX_CODED_SUPERFRAME_SIZE)
- return -1;
+ goto fail;
q = s->last_superframe + s->last_superframe_len;
len = bit_offset;
while (len > 0) {
}
/* XXX: bit_offset bits into last frame */
- init_get_bits(&s->gb, s->last_superframe, MAX_CODED_SUPERFRAME_SIZE);
+ init_get_bits(&s->gb, s->last_superframe, MAX_CODED_SUPERFRAME_SIZE*8);
/* skip unused bits */
if (s->last_bitoffset > 0)
skip_bits(&s->gb, s->last_bitoffset);
/* this frame is stored in the last superframe and in the
current one */
if (wma_decode_frame(s, samples) < 0)
- return -1;
+ goto fail;
samples += s->nb_channels * s->frame_len;
}
/* read each frame starting from bit_offset */
pos = bit_offset + 4 + 4 + s->byte_offset_bits + 3;
- init_get_bits(&s->gb, buf + (pos >> 3), MAX_CODED_SUPERFRAME_SIZE - (pos >> 3));
+ init_get_bits(&s->gb, buf + (pos >> 3), (MAX_CODED_SUPERFRAME_SIZE - (pos >> 3))*8);
len = pos & 7;
if (len > 0)
skip_bits(&s->gb, len);
s->reset_block_lengths = 1;
for(i=0;i<nb_frames;i++) {
if (wma_decode_frame(s, samples) < 0)
- return -1;
+ goto fail;
samples += s->nb_channels * s->frame_len;
}
s->last_bitoffset = pos & 7;
pos >>= 3;
len = buf_size - pos;
- if (len > MAX_CODED_SUPERFRAME_SIZE) {
- return -1;
+ if (len > MAX_CODED_SUPERFRAME_SIZE || len < 0) {
+ goto fail;
}
s->last_superframe_len = len;
memcpy(s->last_superframe, buf + pos, len);
} else {
/* single frame decode */
if (wma_decode_frame(s, samples) < 0)
- return -1;
+ goto fail;
samples += s->nb_channels * s->frame_len;
}
*data_size = (int8_t *)samples - (int8_t *)data;
return s->block_align;
+ fail:
+ /* when error, we reset the bit reservoir */
+ s->last_superframe_len = 0;
+ return -1;
}
static int wma_decode_end(AVCodecContext *avctx)
projects / ffmpeg / blobdiff