31 const uint8_t *
a = p + 4 - ((intptr_t)p & 3);
33 for (end -= 3; p < a && p <
end; p++) {
34 if (p[0] == 0 && p[1] == 0 && p[2] == 1)
38 for (end -= 3; p <
end; p += 4) {
39 uint32_t x = *(
const uint32_t*)p;
42 if ((x - 0x01010101) & (~x) & 0x80808080) {
44 if (p[0] == 0 && p[2] == 1)
46 if (p[2] == 0 && p[3] == 1)
50 if (p[2] == 0 && p[4] == 1)
52 if (p[4] == 0 && p[5] == 1)
58 for (end += 3; p <
end; p++) {
59 if (p[0] == 0 && p[1] == 0 && p[2] == 1)
68 if(p<out && out<end && !out[-1]) out--;
76 const uint8_t *nal_start, *nal_end;
81 while (nal_start < end && !*(nal_start++));
87 avio_write(pb, nal_start, nal_end - nal_start);
88 size += 4 + nal_end - nal_start;
113 uint32_t sps_size = 0, pps_size = 0;
114 int ret, nb_sps = 0, nb_pps = 0;
120 if (
AV_RB32(data) != 0x00000001 &&
140 while (end - buf > 4) {
145 nal_type = buf[0] & 0x1f;
155 }
else if (nal_type == 8) {
170 if (sps_size < 6 || !pps_size) {
200 uint16_t sps_size, pps_size;
205 if (*size >= 4 && (
AV_RB32(in) == 0x00000001 ||
AV_RB24(in) == 0x000001))
207 if (*size < 11 || in[0] != 1)
211 if (11 + sps_size > *size)
213 pps_size =
AV_RB16(&in[9 + sps_size]);
214 if (11 + sps_size + pps_size > *size)
216 out_size = 8 + sps_size + pps_size;
221 memcpy(out + 4, &in[8], sps_size);
222 AV_WB32(&out[4 + sps_size], 0x00000001);
223 memcpy(out + 8 + sps_size, &in[11 + sps_size], pps_size);
233 unsigned int res = 0;
235 if (end - start < nal_length_size)
237 while (nal_length_size--)
238 res = (res << 8) | *start++;
240 if (res > end - start)
247 uint32_t *dst_len,
int header_len)
258 while (i < header_len && i < src_len)
259 dst[len++] = src[i++];
261 while (i + 2 < src_len)
262 if (!src[i] && !src[i + 1] && src[i + 2] == 3) {
263 dst[len++] = src[i++];
264 dst[len++] = src[i++];
267 dst[len++] = src[i++];
270 dst[len++] = src[i++];
300 for (i = 0; i < 32 && !
get_bits1(gb); i++)
308 return ((v >> 1) ^ sign) - sign;
313 int i, j, ret, rbsp_size, aspect_ratio_idc, pic_order_cnt_type;
314 int num_ref_frames_in_pic_order_cnt_cycle;
315 int delta_scale, lastScale = 8, nextScale = 8;
316 int sizeOfScalingList;
362 sizeOfScalingList = i < 6 ? 16 : 64;
363 for (j = 0; j < sizeOfScalingList; j++) {
364 if (nextScale != 0) {
366 nextScale = (lastScale + delta_scale) & 0xff;
368 lastScale = nextScale == 0 ? lastScale : nextScale;
380 if (pic_order_cnt_type == 0) {
382 }
else if (pic_order_cnt_type == 1) {
387 for (i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++)
411 aspect_ratio_idc =
get_bits(&gb, 8);
412 if (aspect_ratio_idc == 0xff) {
415 }
else if (aspect_ratio_idc <
FF_ARRAY_ELEMS(avc_sample_aspect_ratio)) {
416 sps->
sar = avc_sample_aspect_ratio[aspect_ratio_idc];
uint8_t chroma_format_idc
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int get_se_golomb(GetBitContext *gb)
const uint8_t * ff_avc_find_startcode(const uint8_t *p, const uint8_t *end)
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
static int get_ue_golomb(GetBitContext *gb)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
static const AVRational avc_sample_aspect_ratio[17]
static av_cold int end(AVCodecContext *avctx)
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
bitstream reader API header.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
H.264 common definitions.
#define i(width, name, range_min, range_max)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
int ff_avc_parse_nal_units(AVIOContext *pb, const uint8_t *buf_in, int size)
uint8_t frame_mbs_only_flag
static const uint8_t * ff_avc_find_startcode_internal(const uint8_t *p, const uint8_t *end)
uint8_t constraint_set_flags
uint8_t * ff_nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len, uint32_t *dst_len, int header_len)
#define FF_ARRAY_ELEMS(a)
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
void avio_w8(AVIOContext *s, int b)
static unsigned int get_bits1(GetBitContext *s)
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)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
static void skip_bits1(GetBitContext *s)
static void skip_bits(GetBitContext *s, int n)
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
Rational number (pair of numerator and denominator).
const uint8_t * ff_avc_mp4_find_startcode(const uint8_t *start, const uint8_t *end, int nal_length_size)
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
void avio_wb16(AVIOContext *s, unsigned int val)
H264SequenceParameterSet * ff_avc_decode_sps(const uint8_t *buf, int buf_size)
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
void avio_wb32(AVIOContext *s, unsigned int val)
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
static av_always_inline int get_bitsz(GetBitContext *s, int n)
Read 0-25 bits.