コード例 #1
0
ファイル: rv10.c プロジェクト: Yelinson/OpenVideoHub
/* write RV 1.0 compatible frame header */
void rv10_encode_picture_header(MpegEncContext *s, int picture_number)
{
    int full_frame= 0;

    align_put_bits(&s->pb);

    put_bits(&s->pb, 1, 1);     /* marker */

    put_bits(&s->pb, 1, (s->pict_type == FF_P_TYPE));

    put_bits(&s->pb, 1, 0);     /* not PB frame */

    put_bits(&s->pb, 5, s->qscale);

    if (s->pict_type == FF_I_TYPE) {
        /* specific MPEG like DC coding not used */
    }
    /* if multiple packets per frame are sent, the position at which
       to display the macro blocks is coded here */
    if(!full_frame){
        put_bits(&s->pb, 6, 0); /* mb_x */
        put_bits(&s->pb, 6, 0); /* mb_y */
        put_bits(&s->pb, 12, s->mb_width * s->mb_height);
    }

    put_bits(&s->pb, 3, 0);     /* ignored */
}
コード例 #2
0
ファイル: mpeg4audio.c プロジェクト: 248668342/ffmpeg-windows
int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
{
    int five_bit_ch, four_bit_ch, comment_size, bits;
    int offset = put_bits_count(pb);

    copy_bits(pb, gb, 10);                  //Tag, Object Type, Frequency
    five_bit_ch  = copy_bits(pb, gb, 4);    //Front
    five_bit_ch += copy_bits(pb, gb, 4);    //Side
    five_bit_ch += copy_bits(pb, gb, 4);    //Back
    four_bit_ch  = copy_bits(pb, gb, 2);    //LFE
    four_bit_ch += copy_bits(pb, gb, 3);    //Data
    five_bit_ch += copy_bits(pb, gb, 4);    //Coupling
    if (copy_bits(pb, gb, 1))               //Mono Mixdown
        copy_bits(pb, gb, 4);
    if (copy_bits(pb, gb, 1))               //Stereo Mixdown
        copy_bits(pb, gb, 4);
    if (copy_bits(pb, gb, 1))               //Matrix Mixdown
        copy_bits(pb, gb, 3);
    for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16)
        copy_bits(pb, gb, 16);
    if (bits)
        copy_bits(pb, gb, bits);
    align_put_bits(pb);
    align_get_bits(gb);
    comment_size = copy_bits(pb, gb, 8);
    for (; comment_size > 0; comment_size--)
        copy_bits(pb, gb, 8);

    return put_bits_count(pb) - offset;
}
コード例 #3
0
ファイル: xau.audio.cpp プロジェクト: iamale/palm-heroes
size_t xau_pcm8m_encode( const sint8* pcm, size_t samples, void* buf, size_t bufsize )
{
	// check preconditions

	xau_codec_t codec;
	init_put_bits( &codec.pb, (uint8*)buf, bufsize );
	rice_init( codec.rice, PCM8M_K1, PCM8M_K2 );
	ppfilter_init( &codec.flt, PCM8M_SH );

	const sint8* p = pcm;
	for( size_t n = 0; n != samples; ++n ) {
		// a) skip sample diffing part as it seems hurting performance a lot on 8bit mode
		// *p -= prev / 2
		// b) apply polyphase filter
		sint32 tmp = ppfilter_encode( &codec.flt, *p++ );
		// c) skip median predictor part - also hurts performance on 8bps
		// *p -= PREDICTOR1( last, 4 );
		// d) encode the 'unsignificated' code
		rice_enc( &codec.pb, codec.rice, xbs_sign_pack( tmp ) );
	}
	align_put_bits( &codec.pb );
	uint32 written = put_bits_count( &codec.pb ) / 8;

	// check for overruns
	return written;
}
コード例 #4
0
ファイル: asv1.c プロジェクト: pcercuei/dcplaya
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
    ASV1Context * const a = avctx->priv_data;
    AVFrame *pict = data;
    AVFrame * const p= (AVFrame*)&a->picture;
    int size;
    int mb_x, mb_y;

    init_put_bits(&a->pb, buf, buf_size);
    
    *p = *pict;
    p->pict_type= I_TYPE;
    p->key_frame= 1;

    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
            dct_get(a, mb_x, mb_y);
            encode_mb(a, a->block);
        }
    }

    if(a->mb_width2 != a->mb_width){
        mb_x= a->mb_width2;
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
            dct_get(a, mb_x, mb_y);
            encode_mb(a, a->block);
        }
    }

    if(a->mb_height2 != a->mb_height){
        mb_y= a->mb_height2;
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
            dct_get(a, mb_x, mb_y);
            encode_mb(a, a->block);
        }
    }
    emms_c();
    
    align_put_bits(&a->pb);
    while(put_bits_count(&a->pb)&31)
        put_bits(&a->pb, 8, 0);
    
    size= put_bits_count(&a->pb)/32;
    
    if(avctx->codec_id == CODEC_ID_ASV1)
        a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
    else{
        int i;
        for(i=0; i<4*size; i++)
            buf[i]= reverse[ buf[i] ];
    }
    
    return size*4;
}
コード例 #5
0
void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number)
{
	int format;

	align_put_bits(&s->pb);

	put_bits(&s->pb, 17, 1);
	put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */
	put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->time_base.num) / //FIXME use timestamp
	                     s->avctx->time_base.den) & 0xff); /* TemporalReference */
	if (s->width == 352 && s->height == 288)
		format = 2;
	else if (s->width == 176 && s->height == 144)
		format = 3;
	else if (s->width == 128 && s->height == 96)
		format = 4;
	else if (s->width == 320 && s->height == 240)
		format = 5;
	else if (s->width == 160 && s->height == 120)
		format = 6;
	else if (s->width <= 255 && s->height <= 255)
		format = 0; /* use 1 byte width & height */
	else
		format = 1; /* use 2 bytes width & height */
	put_bits(&s->pb, 3, format); /* PictureSize */
	if (format == 0)
	{
		put_bits(&s->pb, 8, s->width);
		put_bits(&s->pb, 8, s->height);
	}
	else if (format == 1)
	{
		put_bits(&s->pb, 16, s->width);
		put_bits(&s->pb, 16, s->height);
	}
	put_bits(&s->pb, 2, s->pict_type == FF_P_TYPE); /* PictureType */
	put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
	put_bits(&s->pb, 5, s->qscale); /* Quantizer */
	put_bits(&s->pb, 1, 0); /* ExtraInformation */

	if(s->h263_aic)
	{
		s->y_dc_scale_table=
		    s->c_dc_scale_table= ff_aic_dc_scale_table;
	}
	else
	{
		s->y_dc_scale_table=
		    s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
	}
}
コード例 #6
0
ファイル: wmaenc.c プロジェクト: 119/dropcam_for_iphone
static int encode_frame(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], uint8_t *buf, int buf_size, int total_gain){
    init_put_bits(&s->pb, buf, buf_size);

    if (s->use_bit_reservoir) {
        assert(0);//FIXME not implemented
    }else{
        if(encode_block(s, src_coefs, total_gain) < 0)
            return INT_MAX;
    }

    align_put_bits(&s->pb);

    return put_bits_count(&s->pb)/8 - s->block_align;
}
コード例 #7
0
ファイル: aacenc.c プロジェクト: Akuaksh/soc
/**
 * Write some auxiliary information about the created AAC file.
 */
static void put_bitstream_info(AVCodecContext *avctx, AACEncContext *s, const char *name)
{
    int i, namelen, padbits;

    namelen = strlen(name) + 2;
    put_bits(&s->pb, 3, TYPE_FIL);
    put_bits(&s->pb, 4, FFMIN(namelen, 15));
    if(namelen >= 15)
        put_bits(&s->pb, 8, namelen - 16);
    put_bits(&s->pb, 4, 0); //extension type - filler
    padbits = 8 - (put_bits_count(&s->pb) & 7);
    align_put_bits(&s->pb);
    for(i = 0; i < namelen - 2; i++)
        put_bits(&s->pb, 8, name[i]);
    put_bits(&s->pb, 12 - padbits, 0);
}
コード例 #8
0
ファイル: mpegaudio.c プロジェクト: pigmin/lisa-m-team4938
/* pad the end of the output stream with zeros */
void flush_put_bits(PutBitContext *s)
{
#ifdef ALT_BITSTREAM_WRITER
    align_put_bits(s);
#else
    s->bit_buf<<= s->bit_left;
    while (s->bit_left < 32) {
        /* XXX: should test end of buffer */
        *s->buf_ptr++=s->bit_buf >> 24;
        s->bit_buf<<=8;
        s->bit_left+=8;
    }
    s->bit_left=32;
    s->bit_buf=0;
#endif
}
コード例 #9
0
ファイル: cljr.c プロジェクト: Bevara/extra_libs_open
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
    CLJRContext * const a = avctx->priv_data;
    AVFrame *pict = data;
    AVFrame * const p= (AVFrame*)&a->picture;
    int size;

    *p = *pict;
    p->pict_type= FF_I_TYPE;
    p->key_frame= 1;

    emms_c();

    align_put_bits(&a->pb);
    while(get_bit_count(&a->pb)&31)
        put_bits(&a->pb, 8, 0);

    size= get_bit_count(&a->pb)/32;

    return size*4;
}
コード例 #10
0
ファイル: ituh263enc.c プロジェクト: eugenehp/ffmbc
void h263_encode_picture_header(MpegEncContext * s, int picture_number)
{
    int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref;
    int best_clock_code=1;
    int best_divisor=60;
    int best_error= INT_MAX;

    if(s->h263_plus){
        for(i=0; i<2; i++){
            int div, error;
            div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den);
            div= av_clip(div, 1, 127);
            error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div);
            if(error < best_error){
                best_error= error;
                best_divisor= div;
                best_clock_code= i;
            }
        }
    }
    s->custom_pcf= best_clock_code!=1 || best_divisor!=60;
    coded_frame_rate= 1800000;
    coded_frame_rate_base= (1000+best_clock_code)*best_divisor;

    align_put_bits(&s->pb);

    /* Update the pointer to last GOB */
    s->ptr_lastgob = put_bits_ptr(&s->pb);
    put_bits(&s->pb, 22, 0x20); /* PSC */
    temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp
                         (coded_frame_rate_base * (int64_t)s->avctx->time_base.den);
    put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */

    put_bits(&s->pb, 1, 1);     /* marker */
    put_bits(&s->pb, 1, 0);     /* h263 id */
    put_bits(&s->pb, 1, 0);     /* split screen off */
    put_bits(&s->pb, 1, 0);     /* camera  off */
    put_bits(&s->pb, 1, 0);     /* freeze picture release off */

    format = ff_match_2uint16(h263_format, FF_ARRAY_ELEMS(h263_format), s->width, s->height);
    if (!s->h263_plus) {
        /* H.263v1 */
        put_bits(&s->pb, 3, format);
        put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P));
        /* By now UMV IS DISABLED ON H.263v1, since the restrictions
        of H.263v1 UMV implies to check the predicted MV after
        calculation of the current MB to see if we're on the limits */
        put_bits(&s->pb, 1, 0);         /* Unrestricted Motion Vector: off */
        put_bits(&s->pb, 1, 0);         /* SAC: off */
        put_bits(&s->pb, 1, s->obmc);   /* Advanced Prediction */
        put_bits(&s->pb, 1, 0);         /* only I/P frames, no PB frame */
        put_bits(&s->pb, 5, s->qscale);
        put_bits(&s->pb, 1, 0);         /* Continuous Presence Multipoint mode: off */
    } else {
        int ufep=1;
        /* H.263v2 */
        /* H.263 Plus PTYPE */

        put_bits(&s->pb, 3, 7);
        put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */
        if (format == 8)
            put_bits(&s->pb,3,6); /* Custom Source Format */
        else
            put_bits(&s->pb, 3, format);

        put_bits(&s->pb,1, s->custom_pcf);
        put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */
        put_bits(&s->pb,1,0); /* SAC: off */
        put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */
        put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */
        put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */
        put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */
        put_bits(&s->pb,1,0); /* Reference Picture Selection: off */
        put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */
        put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */
        put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */
        put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
        put_bits(&s->pb,3,0); /* Reserved */

        put_bits(&s->pb, 3, s->pict_type == AV_PICTURE_TYPE_P);

        put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */
        put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */
        put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */
        put_bits(&s->pb,2,0); /* Reserved */
        put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */

        /* This should be here if PLUSPTYPE */
        put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */

        if (format == 8) {
            /* Custom Picture Format (CPFMT) */
            s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);

            put_bits(&s->pb,4,s->aspect_ratio_info);
            put_bits(&s->pb,9,(s->width >> 2) - 1);
            put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
            put_bits(&s->pb,9,(s->height >> 2));
            if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
                put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
                put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
            }
        }
        if(s->custom_pcf){
            if(ufep){
                put_bits(&s->pb, 1, best_clock_code);
                put_bits(&s->pb, 7, best_divisor);
            }
            put_sbits(&s->pb, 2, temp_ref>>8);
        }

        /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */
        if (s->umvplus)
//            put_bits(&s->pb,1,1); /* Limited according tables of Annex D */
//FIXME check actual requested range
            put_bits(&s->pb,2,1); /* unlimited */
        if(s->h263_slice_structured)
            put_bits(&s->pb,2,0); /* no weird submodes */

        put_bits(&s->pb, 5, s->qscale);
    }
コード例 #11
0
static void put_header(MpegEncContext *s, int header)
{
    align_put_bits(&s->pb);
    put_bits(&s->pb, 16, header>>16);
    put_sbits(&s->pb, 16, header);
}
コード例 #12
0
ファイル: wmaenc.c プロジェクト: 119/dropcam_for_iphone
static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], int total_gain){
    int v, bsize, ch, coef_nb_bits, parse_exponents;
    float mdct_norm;
    int nb_coefs[MAX_CHANNELS];
    static const int fixed_exp[25]={20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20};

    //FIXME remove duplication relative to decoder
    if (s->use_variable_block_len) {
        assert(0); //FIXME not implemented
    }else{
        /* fixed block len */
        s->next_block_len_bits = s->frame_len_bits;
        s->prev_block_len_bits = s->frame_len_bits;
        s->block_len_bits = s->frame_len_bits;
    }

    s->block_len = 1 << s->block_len_bits;
//     assert((s->block_pos + s->block_len) <= s->frame_len);
    bsize = s->frame_len_bits - s->block_len_bits;

    //FIXME factor
    v = s->coefs_end[bsize] - s->coefs_start;
    for(ch = 0; ch < s->nb_channels; ch++)
        nb_coefs[ch] = v;
    {
        int n4 = s->block_len / 2;
        mdct_norm = 1.0 / (float)n4;
        if (s->version == 1) {
            mdct_norm *= sqrt(n4);
        }
    }

    if (s->nb_channels == 2) {
        put_bits(&s->pb, 1, s->ms_stereo= 1);
    }

    for(ch = 0; ch < s->nb_channels; ch++) {
        s->channel_coded[ch] = 1; //FIXME only set channel_coded when needed, instead of always
        if (s->channel_coded[ch]) {
            init_exp(s, ch, fixed_exp);
        }
    }

    for(ch = 0; ch < s->nb_channels; ch++) {
        if (s->channel_coded[ch]) {
            WMACoef *coefs1;
            float *coefs, *exponents, mult;
            int i, n;

            coefs1 = s->coefs1[ch];
            exponents = s->exponents[ch];
            mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
            mult *= mdct_norm;
            coefs = src_coefs[ch];
            if (s->use_noise_coding && 0) {
                assert(0); //FIXME not implemented
            } else {
                coefs += s->coefs_start;
                n = nb_coefs[ch];
                for(i = 0;i < n; i++){
                    double t= *coefs++ / (exponents[i] * mult);
                    if(t<-32768 || t>32767)
                        return -1;

                    coefs1[i] = lrint(t);
                }
            }
        }
    }

    v = 0;
    for(ch = 0; ch < s->nb_channels; ch++) {
        int a = s->channel_coded[ch];
        put_bits(&s->pb, 1, a);
        v |= a;
    }

    if (!v)
        return 1;

    for(v= total_gain-1; v>=127; v-= 127)
        put_bits(&s->pb, 7, 127);
    put_bits(&s->pb, 7, v);

    coef_nb_bits= ff_wma_total_gain_to_bits(total_gain);

    if (s->use_noise_coding) {
        for(ch = 0; ch < s->nb_channels; ch++) {
            if (s->channel_coded[ch]) {
                int i, n;
                n = s->exponent_high_sizes[bsize];
                for(i=0;i<n;i++) {
                    put_bits(&s->pb, 1, s->high_band_coded[ch][i]= 0);
                    if (0)
                        nb_coefs[ch] -= s->exponent_high_bands[bsize][i];
                }
            }
        }
    }

    parse_exponents = 1;
    if (s->block_len_bits != s->frame_len_bits) {
        put_bits(&s->pb, 1, parse_exponents);
    }

    if (parse_exponents) {
        for(ch = 0; ch < s->nb_channels; ch++) {
            if (s->channel_coded[ch]) {
                if (s->use_exp_vlc) {
                    encode_exp_vlc(s, ch, fixed_exp);
                } else {
                    assert(0); //FIXME not implemented
//                    encode_exp_lsp(s, ch);
                }
            }
        }
    } else {
        assert(0); //FIXME not implemented
    }

    for(ch = 0; ch < s->nb_channels; ch++) {
        if (s->channel_coded[ch]) {
            int run, tindex;
            WMACoef *ptr, *eptr;
            tindex = (ch == 1 && s->ms_stereo);
            ptr = &s->coefs1[ch][0];
            eptr = ptr + nb_coefs[ch];

            run=0;
            for(;ptr < eptr; ptr++){
                if(*ptr){
                    int level= *ptr;
                    int abs_level= FFABS(level);
                    int code= 0;
                    if(abs_level <= s->coef_vlcs[tindex]->max_level){
                        if(run < s->coef_vlcs[tindex]->levels[abs_level-1])
                            code= run + s->int_table[tindex][abs_level-1];
                    }

                    assert(code < s->coef_vlcs[tindex]->n);
                    put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code], s->coef_vlcs[tindex]->huffcodes[code]);

                    if(code == 0){
                        if(1<<coef_nb_bits <= abs_level)
                            return -1;


                        //Workaround minor rounding differences for the regression tests, FIXME we should find and replace the problematic float by fixpoint for reg tests
                        if(abs_level == 0x71B && (s->avctx->flags & CODEC_FLAG_BITEXACT)) abs_level=0x71A;

                        put_bits(&s->pb, coef_nb_bits, abs_level);
                        put_bits(&s->pb, s->frame_len_bits, run);
                    }
                    put_bits(&s->pb, 1, level < 0); //FIXME the sign is fliped somewhere
                    run=0;
                }else{
                    run++;
                }
            }
            if(run)
                put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1], s->coef_vlcs[tindex]->huffcodes[1]);
        }
        if (s->version == 1 && s->nb_channels >= 2) {
            align_put_bits(&s->pb);
        }
    }
    return 0;
}