31 #define OUTBUF_PADDED 1
33 #define INBUF_PADDED 1
54 #define GETB(c) (*(c).in++)
56 #define GETB(c) get_byte(&(c))
70 if (cnt >= INT_MAX - 1000) {
90 if (cnt > c->
in_end - src) {
98 #if defined(INBUF_PADDED) && defined(OUTBUF_PADDED)
105 memcpy(dst, src, cnt);
139 if (*outlen <= 0 || *inlen <= 0) {
166 back = (
GETB(c) << 3) + ((x >> 2) & 7) + 1;
170 back = (
GETB(c) << 6) + (x >> 2) + 1;
173 back = (1 << 14) + ((x & 8) << 11);
175 back += (
GETB(c) << 6) + (x >> 2);
176 if (back == (1 << 14)) {
189 back = (1 << 11) + (
GETB(c) << 2) + (x >> 2) + 1;
192 back = (
GETB(c) << 2) + (x >> 2) + 1;
209 #include <lzo/lzo1x.h>
211 #define MAXSZ (10*1024*1024)
215 #define BENCHMARK_LIBLZO_SAFE 0
216 #define BENCHMARK_LIBLZO_UNSAFE 0
218 int main(
int argc,
char *argv[]) {
219 FILE *
in = fopen(argv[1],
"rb");
220 int comp_level = argc > 2 ? atoi(argv[2]) : 0;
224 size_t s = fread(orig, 1, MAXSZ, in);
226 long tmp[LZO1X_MEM_COMPRESS];
230 if (comp_level == 0) {
231 lzo1x_1_compress(orig, s, comp, &clen, tmp);
232 }
else if (comp_level == 11) {
233 lzo1x_1_11_compress(orig, s, comp, &clen, tmp);
234 }
else if (comp_level == 12) {
235 lzo1x_1_12_compress(orig, s, comp, &clen, tmp);
236 }
else if (comp_level == 15) {
237 lzo1x_1_15_compress(orig, s, comp, &clen, tmp);
239 lzo1x_999_compress(orig, s, comp, &clen, tmp);
240 for (i = 0; i < 300; i++) {
242 inlen = clen; outlen = MAXSZ;
243 #if BENCHMARK_LIBLZO_SAFE
244 if (lzo1x_decompress_safe(comp, inlen, decomp, &outlen,
NULL))
245 #elif BENCHMARK_LIBLZO_UNSAFE
246 if (lzo1x_decompress(comp, inlen, decomp, &outlen,
NULL))
253 if (memcmp(orig, decomp, s))
#define AV_LZO_ERROR
a non-specific error in the compressed bitstream
void av_log_set_level(int level)
Set the log level.
static int get_len(LZOContext *c, int x, int mask)
Decodes a length value in the coding used by lzo.
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
#define av_assert0(cond)
assert() equivalent, that is always enabled.
static void copy(LZOContext *c, int cnt)
Copies bytes from input to output buffer with checking.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const uint16_t mask[17]
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
simple assert() macros that are a bit more flexible than ISO C assert().
static void copy_backptr(LZOContext *c, int back, int cnt)
Copies previously decoded bytes to current position.
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
#define AV_LZO_INPUT_DEPLETED
end of the input buffer reached before decoding finished
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
common internal and external API header
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
deliberately overlapping memcpy implementation
int main(int argc, char **argv)
#define AV_LZO_INVALID_BACKPTR
a reference to previously decoded data was wrong
static int get_byte(LZOContext *c)
Reads one byte from the input buffer, avoiding an overrun.