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-rw-r--r--apps/codecs/libffmpegFLAC/SOURCES1
-rw-r--r--apps/codecs/libffmpegFLAC/decoder.c14
-rw-r--r--apps/codecs/libffmpegFLAC/golomb.h35
-rw-r--r--apps/codecs/libffmpegFLAC/shndec.c404
-rw-r--r--apps/codecs/libffmpegFLAC/shndec.h36
5 files changed, 475 insertions, 15 deletions
diff --git a/apps/codecs/libffmpegFLAC/SOURCES b/apps/codecs/libffmpegFLAC/SOURCES
index 5ed653ca53..93cd6f97f8 100644
--- a/apps/codecs/libffmpegFLAC/SOURCES
+++ b/apps/codecs/libffmpegFLAC/SOURCES
@@ -1,5 +1,6 @@
bitstream.c
decoder.c
+shndec.c
#if defined(CPU_COLDFIRE) && !defined(SIMULATOR)
coldfire.S
#endif
diff --git a/apps/codecs/libffmpegFLAC/decoder.c b/apps/codecs/libffmpegFLAC/decoder.c
index 9d84bb17e4..082bb99b6a 100644
--- a/apps/codecs/libffmpegFLAC/decoder.c
+++ b/apps/codecs/libffmpegFLAC/decoder.c
@@ -46,23 +46,9 @@
#include "coldfire.h"
#endif
-#define INT_MAX 2147483647
-
#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
-/* Needed by golomb.h */
-const uint8_t ff_log2_tab[256] ICONST_ATTR = {
- 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
-};
-
static const int sample_rate_table[] ICONST_ATTR =
{ 0, 0, 0, 0,
8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000,
diff --git a/apps/codecs/libffmpegFLAC/golomb.h b/apps/codecs/libffmpegFLAC/golomb.h
index 9dcbcb2d54..2739f38086 100644
--- a/apps/codecs/libffmpegFLAC/golomb.h
+++ b/apps/codecs/libffmpegFLAC/golomb.h
@@ -19,9 +19,20 @@
*
*/
+#include <limits.h>
/* From libavutil/common.h */
-extern const uint8_t ff_log2_tab[256];
+const uint8_t ff_log2_tab[256] ICONST_ATTR = {
+ 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
+ 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
+};
+
static inline int av_log2(unsigned int v)
{
int n;
@@ -104,3 +115,25 @@ static inline int get_sr_golomb_flac(GetBitContext *gb, int k, int limit, int es
int v= get_ur_golomb_jpegls(gb, k, limit, esc_len);
return (v>>1) ^ -(v&1);
}
+
+/**
+ * read unsigned golomb rice code (shorten).
+ */
+#define get_ur_golomb_shorten(gb, k) get_ur_golomb_jpegls(gb, k, INT_MAX, 0)
+/*
+static inline unsigned int get_ur_golomb_shorten(GetBitContext *gb, int k){
+ return get_ur_golomb_jpegls(gb, k, INT_MAX, 0);
+}
+*/
+
+/**
+ * read signed golomb rice code (shorten).
+ */
+static inline int get_sr_golomb_shorten(GetBitContext* gb, int k)
+{
+ int uvar = get_ur_golomb_jpegls(gb, k + 1, INT_MAX, 0);
+ if (uvar & 1)
+ return ~(uvar >> 1);
+ else
+ return uvar >> 1;
+}
diff --git a/apps/codecs/libffmpegFLAC/shndec.c b/apps/codecs/libffmpegFLAC/shndec.c
new file mode 100644
index 0000000000..7f5f5f4767
--- /dev/null
+++ b/apps/codecs/libffmpegFLAC/shndec.c
@@ -0,0 +1,404 @@
+/*
+ * Shorten decoder
+ * Copyright (c) 2005 Jeff Muizelaar
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * 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 shorten.c
+ * Shorten decoder
+ * @author Jeff Muizelaar
+ *
+ */
+
+#include "../codec.h"
+#include "../lib/codeclib.h"
+extern struct codec_api* ci;
+#define DEBUGF ci->debugf
+
+#include "bitstream.h"
+#include "golomb.h"
+#include "shndec.h"
+
+/* These seem reasonable from my test files.
+ Does MAX_HEADER_SIZE really need to be 16384? */
+#define MAX_PRED_ORDER 16
+#define MAX_HEADER_SIZE DEFAULT_BLOCK_SIZE*4
+//#define MAX_HEADER_SIZE 16384
+
+#define ULONGSIZE 2
+
+#define WAVE_FORMAT_PCM 0x0001
+
+#define TYPESIZE 4
+#define CHANSIZE 0
+#define LPCQSIZE 2
+#define ENERGYSIZE 3
+#define BITSHIFTSIZE 2
+
+#define TYPE_S16HL 3 /* signed 16 bit shorts: high-low */
+#define TYPE_S16LH 5 /* signed 16 bit shorts: low-high */
+
+#define NWRAP 3
+#define NSKIPSIZE 1
+
+#define LPCQUANT 5
+#define V2LPCQOFFSET (1 << LPCQUANT)
+
+#define FNSIZE 2
+#define FN_DIFF0 0
+#define FN_DIFF1 1
+#define FN_DIFF2 2
+#define FN_DIFF3 3
+#define FN_QUIT 4
+#define FN_BLOCKSIZE 5
+#define FN_BITSHIFT 6
+#define FN_QLPC 7
+#define FN_ZERO 8
+#define FN_VERBATIM 9
+
+#define VERBATIM_CKSIZE_SIZE 5
+#define VERBATIM_BYTE_SIZE 8
+#define CANONICAL_HEADER_SIZE 44
+
+#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
+#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
+#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
+
+#define get_le16(gb) bswap_16(get_bits_long(gb, 16))
+#define get_le32(gb) bswap_32(get_bits_long(gb, 32))
+
+static inline uint32_t bswap_32(uint32_t x){
+ x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
+ return (x>>16) | (x<<16);
+}
+
+static inline uint16_t bswap_16(uint16_t x){
+ return (x>>8) | (x<<8);
+}
+
+/* converts fourcc string to int */
+static inline int ff_get_fourcc(const char *s){
+ //assert( strlen(s)==4 );
+ return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);
+}
+
+static unsigned int get_uint(ShortenContext *s, int k) ICODE_ATTR;
+static unsigned int get_uint(ShortenContext *s, int k)
+{
+ if (s->version != 0)
+ k = get_ur_golomb_shorten(&s->gb, ULONGSIZE);
+ return get_ur_golomb_shorten(&s->gb, k);
+}
+
+static void decode_subframe_lpc(ShortenContext *s, int32_t *decoded,
+ int residual_size, int pred_order) ICODE_ATTR;
+static void decode_subframe_lpc(ShortenContext *s, int32_t *decoded,
+ int residual_size, int pred_order)
+{
+ int sum, i, j;
+ int coeffs[MAX_PRED_ORDER];
+
+ for (i=0; i<pred_order; i++) {
+ coeffs[i] = get_sr_golomb_shorten(&s->gb, LPCQUANT);
+ }
+
+ for (i=0; i < s->blocksize; i++) {
+ sum = s->lpcqoffset;
+ for (j=0; j<pred_order; j++)
+ sum += coeffs[j] * decoded[i-j-1];
+
+ decoded[i] =
+ get_sr_golomb_shorten(&s->gb, residual_size) + (sum >> LPCQUANT);
+ }
+}
+
+int shorten_decode_frame(ShortenContext *s,
+ int32_t *decoded,
+ int32_t *offset,
+ uint8_t *buf,
+ int buf_size)
+{
+ int i;
+ int32_t sum;
+
+ init_get_bits(&s->gb, buf, buf_size*8);
+ get_bits(&s->gb, s->bitindex);
+
+ int cmd = get_ur_golomb_shorten(&s->gb, FNSIZE);
+ switch (cmd) {
+ case FN_ZERO:
+ case FN_DIFF0:
+ case FN_DIFF1:
+ case FN_DIFF2:
+ case FN_DIFF3:
+ case FN_QLPC:
+ {
+ int residual_size = 0;
+ int32_t coffset;
+ if (cmd != FN_ZERO) {
+ residual_size = get_ur_golomb_shorten(&s->gb, ENERGYSIZE);
+ /* this is a hack as version 0 differed in defintion of
+ get_sr_golomb_shorten */
+ if (s->version == 0)
+ residual_size--;
+ }
+
+ if (s->nmean == 0) {
+ coffset = offset[0];
+ } else {
+ sum = (s->version < 2) ? 0 : s->nmean / 2;
+ for (i=0; i<s->nmean; i++)
+ sum += offset[i];
+
+ coffset = sum / s->nmean;
+ if (s->version >= 2)
+ coffset >>= FFMIN(1, s->bitshift);
+ }
+
+ switch (cmd) {
+ case FN_ZERO:
+ for (i=0; i<s->blocksize; i++)
+ decoded[i] = 0;
+ break;
+
+ case FN_DIFF0:
+ for (i=0; i<s->blocksize; i++)
+ decoded[i] =
+ get_sr_golomb_shorten(&s->gb, residual_size) +
+ coffset;
+ break;
+
+ case FN_DIFF1:
+ for (i=0; i<s->blocksize; i++)
+ decoded[i] =
+ get_sr_golomb_shorten(&s->gb, residual_size) +
+ decoded[i - 1];
+ break;
+
+ case FN_DIFF2:
+ for (i=0; i<s->blocksize; i++)
+ decoded[i] =
+ get_sr_golomb_shorten(&s->gb, residual_size) +
+ 2*decoded[i-1] - decoded[i-2];
+ break;
+
+ case FN_DIFF3:
+ for (i=0; i<s->blocksize; i++)
+ decoded[i] =
+ get_sr_golomb_shorten(&s->gb, residual_size) +
+ 3*decoded[i-1] - 3*decoded[i-2] + decoded[i-3];
+ break;
+
+ case FN_QLPC:
+ {
+ int pred_order = get_ur_golomb_shorten(&s->gb, LPCQSIZE);
+ if (pred_order > MAX_PRED_ORDER) {
+ return -2;
+ }
+
+ for (i=0; i<pred_order; i++)
+ decoded[i - pred_order] -= coffset;
+ decode_subframe_lpc(s, decoded, residual_size, pred_order);
+ if (coffset != 0) {
+ for (i=0; i < s->blocksize; i++)
+ decoded[i] += coffset;
+ }
+ }
+ }
+
+ if (s->nmean > 0) {
+ sum = (s->version < 2) ? 0 : s->blocksize / 2;
+ for (i=0; i<s->blocksize; i++)
+ sum += decoded[i];
+
+ for (i=1; i<s->nmean; i++)
+ offset[i-1] = offset[i];
+
+ if (s->version < 2) {
+ offset[s->nmean - 1] = sum / s->blocksize;
+ } else {
+ offset[s->nmean - 1] =
+ (sum / s->blocksize) << s->bitshift;
+ }
+ }
+
+ for (i=-s->nwrap; i<0; i++)
+ decoded[i] = decoded[i + s->blocksize];
+
+ int scale = s->bitshift + SHN_OUTPUT_DEPTH - s->bits_per_sample;
+ for (i = 0; i < s->blocksize; i++)
+ decoded[i] <<= scale;
+ break;
+ }
+
+ case FN_VERBATIM:
+ i = get_ur_golomb_shorten(&s->gb, VERBATIM_CKSIZE_SIZE);
+ while (i--)
+ get_ur_golomb_shorten(&s->gb, VERBATIM_BYTE_SIZE);
+ return 4;
+ break;
+
+ case FN_BITSHIFT:
+ s->bitshift = get_ur_golomb_shorten(&s->gb, BITSHIFTSIZE);
+ return 3;
+ break;
+
+ case FN_BLOCKSIZE:
+ s->blocksize = get_uint(s, av_log2(s->blocksize));
+ return 2;
+ break;
+
+ case FN_QUIT:
+ return 1;
+ break;
+
+ default:
+ return -1;
+ break;
+ }
+
+ return 0;
+}
+
+static int decode_wave_header(ShortenContext *s,
+ uint8_t *header,
+ int header_size)
+{
+ GetBitContext hb;
+ int len;
+
+ init_get_bits(&hb, header, header_size*8);
+ if (get_le32(&hb) != MKTAG('R','I','F','F')) {
+ return -8;
+ }
+
+ int chunk_size = get_le32(&hb);
+
+ if (get_le32(&hb) != MKTAG('W','A','V','E')) {
+ return -9;
+ }
+
+ while (get_le32(&hb) != MKTAG('f','m','t',' ')) {
+ len = get_le32(&hb);
+ skip_bits(&hb, 8*len);
+ }
+
+ len = get_le32(&hb);
+ if (len < 16) {
+ return -10;
+ }
+
+ if (get_le16(&hb) != WAVE_FORMAT_PCM ) {
+ return -11;
+ }
+
+ s->channels = get_le16(&hb);
+ if (s->channels > MAX_CHANNELS) {
+ return -3;
+ }
+
+ s->sample_rate = get_le32(&hb);
+
+ skip_bits(&hb, 32);
+ //s->bit_rate = 8*get_le32(&hb);
+
+ int block_align = get_le16(&hb);
+ s->totalsamples = (chunk_size - 36) / block_align;
+
+ s->bits_per_sample = get_le16(&hb);
+ if (s->bits_per_sample != 16) {
+ return -12;
+ }
+
+ len -= 16;
+ if (len > 0) {
+ return len;
+ }
+
+ return 0;
+}
+
+int shorten_init(ShortenContext* s, uint8_t *buf, int buf_size)
+{
+ int i;
+
+ s->blocksize = DEFAULT_BLOCK_SIZE;
+ s->channels = 1;
+ s->nmean = -1;
+
+ init_get_bits(&s->gb, buf, buf_size*8);
+ get_bits(&s->gb, s->bitindex);
+
+ /* shorten signature */
+ if (get_bits_long(&s->gb, 32) != bswap_32(ff_get_fourcc("ajkg"))) {
+ return -1;
+ }
+
+ s->version = get_bits(&s->gb, 8);
+
+ int internal_ftype = get_uint(s, TYPESIZE);
+ if ((internal_ftype != TYPE_S16HL) && (internal_ftype != TYPE_S16LH)) {
+ return -2;
+ }
+
+ s->channels = get_uint(s, CHANSIZE);
+ if (s->channels > MAX_CHANNELS) {
+ return -3;
+ }
+
+ /* get blocksize if version > 0 */
+ int maxnlpc = 0;
+ if (s->version > 0) {
+ s->blocksize = get_uint(s, av_log2(DEFAULT_BLOCK_SIZE));
+ maxnlpc = get_uint(s, LPCQSIZE);
+ s->nmean = get_uint(s, 0);
+
+ int skip_bytes = get_uint(s, NSKIPSIZE);
+ for (i=0; i<skip_bytes; i++) {
+ skip_bits(&s->gb, 8);
+ }
+ }
+
+ if (s->nmean > MAX_NMEAN) {
+ return -4;
+ }
+
+ s->nwrap = FFMAX(NWRAP, maxnlpc);
+ if (s->nwrap > MAX_NWRAP) {
+ return -5;
+ }
+
+ if (s->version > 1)
+ s->lpcqoffset = V2LPCQOFFSET;
+
+ if (get_ur_golomb_shorten(&s->gb, FNSIZE) != FN_VERBATIM) {
+ return -6;
+ }
+
+ uint8_t header[MAX_HEADER_SIZE];
+ int header_size = get_ur_golomb_shorten(&s->gb, VERBATIM_CKSIZE_SIZE);
+ if (header_size >= MAX_HEADER_SIZE || header_size < CANONICAL_HEADER_SIZE) {
+ return -7;
+ }
+
+ for (i=0; i<header_size; i++)
+ header[i] = (char)get_ur_golomb_shorten(&s->gb, VERBATIM_BYTE_SIZE);
+
+ s->header_bits = s->gb.index;
+
+ return decode_wave_header(s, header, header_size);
+}
diff --git a/apps/codecs/libffmpegFLAC/shndec.h b/apps/codecs/libffmpegFLAC/shndec.h
new file mode 100644
index 0000000000..6b830dcafa
--- /dev/null
+++ b/apps/codecs/libffmpegFLAC/shndec.h
@@ -0,0 +1,36 @@
+#include "bitstream.h"
+
+#define SHN_OUTPUT_DEPTH 28
+#define DEFAULT_BLOCK_SIZE 256
+#define MAX_FRAMESIZE 1024
+#define MAX_CHANNELS 2
+#define MAX_NWRAP 3
+#define MAX_NMEAN 4
+
+typedef struct ShortenContext {
+ GetBitContext gb;
+ int32_t lpcqoffset;
+ uint32_t totalsamples;
+ int header_bits;
+ int channels;
+ int sample_rate;
+ int bits_per_sample;
+ int version;
+ int bitshift;
+ int nmean;
+ int nwrap;
+ int blocksize;
+ int bitindex;
+/* Not needed...
+ int bit_rate;
+ int block_align;
+ int chunk_size;
+*/
+} ShortenContext;
+
+int shorten_init(ShortenContext* s, uint8_t *buf, int buf_size);
+int shorten_decode_frame(ShortenContext *s,
+ int32_t *decoded,
+ int32_t *offset,
+ uint8_t *buf,
+ int buf_size) ICODE_ATTR;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 06:30:21 +0000