32 const uint8_t *
a = p + 4 - ((intptr_t)p & 3);
34 for (end -= 3; p <
a && p < end; p++) {
35 if (p[0] == 0 && p[1] == 0 && p[2] == 1)
39 for (end -= 3; p < end; p += 4) {
40 uint32_t x = *(
const uint32_t*)p;
43 if ((x - 0x01010101) & (~x) & 0x80808080) {
45 if (p[0] == 0 && p[2] == 1)
47 if (p[2] == 0 && p[3] == 1)
51 if (p[2] == 0 && p[4] == 1)
53 if (p[4] == 0 && p[5] == 1)
59 for (end += 3; p < end; p++) {
60 if (p[0] == 0 && p[1] == 0 && p[2] == 1)
77 const uint8_t *nal_start, *nal_end;
82 while (nal_start < end && !*(nal_start++));
88 avio_write(pb, nal_start, nal_end - nal_start);
89 size += 4 + nal_end - nal_start;
113 uint32_t sps_size = 0, pps_size = 0, sps_ext_size = 0;
114 int ret, nb_sps = 0, nb_pps = 0, nb_sps_ext = 0;
143 while (end - buf > 4) {
148 nal_type = buf[0] & 0x1f;
158 }
else if (nal_type == 8) {
166 }
else if (nal_type == 13) {
168 if (
size > UINT16_MAX || nb_sps_ext >= 256) {
182 if (sps_size < 6 || !pps_size) {
198 if (
sps[3] != 66 &&
sps[3] != 77 &&
sps[3] != 88) {
223 uint16_t sps_size, pps_size;
230 if (*
size < 11 ||
in[0] != 1)
234 if (11 + sps_size > *
size)
237 if (11 + sps_size + pps_size > *
size)
244 memcpy(
out + 4, &
in[8], sps_size);
246 memcpy(
out + 8 + sps_size, &
in[11 + sps_size], pps_size);
256 unsigned int res = 0;
258 if (end - start < nal_length_size)
260 while (nal_length_size--)
261 res = (res << 8) | *start++;
263 if (res > end - start)
270 uint32_t *dst_len,
int header_len)
281 while (
i < header_len &&
i < src_len)
284 while (
i + 2 < src_len)
331 return ((v >> 1) ^ sign) - sign;
336 int i, j, ret, rbsp_size, aspect_ratio_idc, pic_order_cnt_type;
337 int num_ref_frames_in_pic_order_cnt_cycle;
338 int delta_scale, lastScale = 8, nextScale = 8;
339 int sizeOfScalingList;
351 memset(
sps, 0,
sizeof(*
sps));
364 if (
sps->profile_idc == 100 ||
sps->profile_idc == 110 ||
365 sps->profile_idc == 122 ||
sps->profile_idc == 244 ||
sps->profile_idc == 44 ||
366 sps->profile_idc == 83 ||
sps->profile_idc == 86 ||
sps->profile_idc == 118 ||
367 sps->profile_idc == 128 ||
sps->profile_idc == 138 ||
sps->profile_idc == 139 ||
368 sps->profile_idc == 134) {
370 if (
sps->chroma_format_idc == 3) {
377 for (
i = 0;
i < ((
sps->chroma_format_idc != 3) ? 8 : 12);
i++) {
382 sizeOfScalingList =
i < 6 ? 16 : 64;
383 for (j = 0; j < sizeOfScalingList; j++) {
384 if (nextScale != 0) {
386 nextScale = (lastScale + delta_scale) & 0xff;
388 lastScale = nextScale == 0 ? lastScale : nextScale;
393 sps->chroma_format_idc = 1;
394 sps->bit_depth_luma = 8;
395 sps->bit_depth_chroma = 8;
401 if (pic_order_cnt_type == 0) {
403 }
else if (pic_order_cnt_type == 1) {
408 for (
i = 0;
i < num_ref_frames_in_pic_order_cnt_cycle;
i++)
418 if (!
sps->frame_mbs_only_flag)
432 aspect_ratio_idc =
get_bits(&gb, 8);
433 if (aspect_ratio_idc == 0xff) {
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
const uint8_t * ff_avc_find_startcode(const uint8_t *p, const uint8_t *end)
static int get_se_golomb(GetBitContext *gb)
const uint8_t * ff_avc_mp4_find_startcode(const uint8_t *start, const uint8_t *end, int nal_length_size)
static const AVRational avc_sample_aspect_ratio[17]
int ff_avc_decode_sps(H264SPS *sps, const uint8_t *buf, int buf_size)
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
uint8_t * ff_nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len, uint32_t *dst_len, int header_len)
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
static int get_ue_golomb(GetBitContext *gb)
static const uint8_t * avc_find_startcode_internal(const uint8_t *p, const uint8_t *end)
int ff_avc_parse_nal_units(AVIOContext *pb, const uint8_t *buf_in, int size)
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
void avio_w8(AVIOContext *s, int b)
void avio_wb32(AVIOContext *s, unsigned int val)
void avio_wb16(AVIOContext *s, unsigned int val)
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
bitstream reader API header.
static unsigned int get_bits1(GetBitContext *s)
static void skip_bits(GetBitContext *s, int n)
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
static void skip_bits1(GetBitContext *s)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
static av_always_inline int get_bitsz(GetBitContext *s, int n)
Read 0-25 bits.
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
H.264 common definitions.
#define FF_ARRAY_ELEMS(a)
Rational number (pair of numerator and denominator).
uint8_t chroma_format_idc