Function pnm_encode_frame

libavcodec/pnmenc.c:37–225

} PHMEncContext;

static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                            const AVFrame *p, int *got_packet)
{
    PHMEncContext *s = avctx->priv_data;
    uint8_t *bytestream, *bytestream_start, *bytestream_end;
    int i, h, h1, c, n, linesize, ret;
    int size = av_image_get_buffer_size(avctx->pix_fmt,
                                        avctx->width, avctx->height, 1);

    if (size < 0)
        return size;

    if ((ret = ff_get_encode_buffer(avctx, pkt, size + 200U, 0)) < 0)
        return ret;

    bytestream_start =
    bytestream       = pkt->data;
    bytestream_end   = pkt->data + pkt->size;

    h  = avctx->height;
    h1 = h;
    switch (avctx->pix_fmt) {
    case AV_PIX_FMT_MONOWHITE:
        c  = '4';
        n  = (avctx->width + 7) >> 3;
        break;
    case AV_PIX_FMT_GRAY8:
        c  = '5';
        n  = avctx->width;
        break;
    case AV_PIX_FMT_GRAY16BE:
        c  = '5';
        n  = avctx->width * 2;
        break;
    case AV_PIX_FMT_RGB24:
        c  = '6';
        n  = avctx->width * 3;
        break;
    case AV_PIX_FMT_RGB48BE:
        c  = '6';
        n  = avctx->width * 6;
        break;
    case AV_PIX_FMT_YUV420P:
        if (avctx->width & 1 || avctx->height & 1) {
            av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
            return AVERROR(EINVAL);
        }
        c  = '5';
        n  = avctx->width;
        h1 = (h * 3) / 2;
        break;
    case AV_PIX_FMT_YUV420P16BE:
        c  = '5';
        n  = avctx->width * 2;
        h1 = (h * 3) / 2;
        break;
    case AV_PIX_FMT_GBRPF32BE:
    case AV_PIX_FMT_GBRPF32LE: