Function encode_frame

libavcodec/tiffenc.c:198–443

}

static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
                        int buf_size, void *data)
{
    TiffEncoderContext *s = avctx->priv_data;
    AVFrame *pict = data;
    AVFrame *const p = (AVFrame *) & s->picture;
    int i;
    int n;
    uint8_t *ptr = buf;
    uint8_t *offset;
    uint32_t strips;
    uint32_t *strip_sizes = NULL;
    uint32_t *strip_offsets = NULL;
    int bytes_per_row;
    uint32_t res[2] = { 72, 1 };        // image resolution (72/1)
    static const uint16_t bpp_tab[] = { 8, 8, 8, 8 };
    int ret = -1;
    int is_yuv = 0;
    uint8_t *yuv_line = NULL;
    int shift_h, shift_v;

    s->buf_start = buf;
    s->buf = &ptr;
    s->buf_size = buf_size;

    *p = *pict;
    p->pict_type = FF_I_TYPE;
    p->key_frame = 1;
    avctx->coded_frame= &s->picture;

    s->compr = TIFF_PACKBITS;
    if (avctx->compression_level == 0) {
        s->compr = TIFF_RAW;
    } else if(avctx->compression_level == 2) {
        s->compr = TIFF_LZW;
#if CONFIG_ZLIB
    } else if ((avctx->compression_level >= 3)) {
        s->compr = TIFF_DEFLATE;
#endif
    }

    s->width = avctx->width;
    s->height = avctx->height;
    s->subsampling[0] = 1;
    s->subsampling[1] = 1;

    switch (avctx->pix_fmt) {
    case PIX_FMT_RGB24:
        s->bpp = 24;
        s->photometric_interpretation = 2;
        break;
    case PIX_FMT_GRAY8:
        s->bpp = 8;
        s->photometric_interpretation = 1;
        break;
    case PIX_FMT_PAL8:
        s->bpp = 8;
        s->photometric_interpretation = 3;